Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
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| studies on the toxicity of acetone, acrolein and carbon dioxide on stored-product insects and wheat seed. | in laboratory experiments toxicity of acetone, acrolein and carbon dioxide were investigated against 4 species of stored-product insects. in all experiments, acrolein was the most toxic compound to the tested insects. in empty-space trials, estimated ld50 values of acrolein for adults of tribolium castaneum (herbst) (tenebrionidae), rhizopertha dominica (f.) (bostrychidae), sitophilus oryzae l. (curculionidae) and oryzaephilus surinamensis l. (silvanidae) were 7.26, 6.09, 6.37 and 5.65 microl l( ... | 2008 | 18810963 |
| temperature extremes, density dependence, and southern pine beetle (coleoptera: curculionidae) population dynamics in east texas. | previous studies of the southern pine beetle, dendroctonus frontalis zimm., established that its population in east texas responds to a delayed density-dependent process, whereas no clear role of climate has been determined. we tested two biological hypotheses for the influence of extreme temperatures on annual southern pine beetle population growth in the context of four alternative hypotheses for density-dependent population regulation. the significance of climate variables and their interacti ... | 2008 | 18559170 |
| mitochondrial nucleotide variability in invasive populations of the root weevil diaprepes abbreviatus (coleoptera: curculionidae) of florida and preliminary assessment of diaprepes sp. from dominica. | diaprepes abbreviatus (l.) (coleoptera: curculionidae) is a root weevil introduced into the united states from the caribbean in 1964. it is associated with >300 plants, including citrus, sugarcane, and potatoes. d. abbreviatus is widespread in florida, and it has recently been detected in limited areas of california and texas. the purpose of this research is to evaluate the utility of 16s ribosomal (16s rrna) and cytochrome oxidase i (coi) mitochondrial markers for the delineation of genetic pop ... | 2008 | 18767759 |
| effect of temperature and commodity on insecticidal efficacy of spinosad dust against sitophilus oryzae (coleoptera: curculionidae) and rhyzopertha dominica (coleoptera: bostrychidae). | the insecticidal effect of spinosad dust, a formulation that contains 0.125% spinosad, was evaluated against adults of sitophilus oryzae (l.) and rhyzopertha dominica (f.) at three temperature levels (20, 25, and 30 degrees c) and four commodities (wheat, triticum aestivum l.; barley, hordeum vulgare l.; rice, oryza sativa l.; and maize, zea mays l.). for this purpose, quantities of the above-mentioned grains were treated with spinosad at two dose rates (20 and 50 ppm of the formulation, corresp ... | 2008 | 18613602 |
| cotton harvest at 40% versus 75% boll-splitting on yield and economic return under standard and proactive boll weevil (coleoptera: curculionidae) spray regimes. | the standard practice of two or three preemptive insecticide applications at the start of pinhead (1-2-mm-diameter) squaring followed by threshold-triggered (when 10% of randomly selected squares have oviposition punctures) insecticide applications for boll weevil, anthonomus grandis grandis boheman (coleoptera: curculionidae), control does not provide reliable protection of cotton, gossypium hirsutum l., lint production. this study, conducted during 2004 and 2005, showed that three to six fewer ... | 2008 | 18950042 |
| transposable element loads in a bacterial symbiont of weevils are extremely variable. | not only are transposable elements profuse in the bacterial endosymbiont of maize weevils, but we found that their quantities also vary approximately 10-fold among individual weevils. because multicopy elements can facilitate homologous recombination, this insertion sequence (is) load variability suggests that these essentially asexual bacteria may exhibit substantial intraspecific genomic variation. | 2008 | 18952872 |
| detection of gamma radiation-induced dna damage in maize weevil, sitophilus zeamais motschulsky (coleoptera: curculionidae) assessed using the comet assay. | the deoxyribonucleic acid (dna) comet assay, being a quick, simple, sensitive, reliable and fairly inexpensive method for measuring dna strand breaks, has been used to assess dna damage caused by gamma radiation in developmental stages of maize weevil sitophilus zeamais motschulsky. | 2008 | 18979316 |
| odor-baited trap trees: a novel management tool for plum curculio (coleoptera: curculionidae). | the plum curculio, conotrachelus nenuphar (herbst) (coleoptera: curculionidae), one of the most important pests of apple (malus spp.) in eastern and central north america, historically has been managed in new england apple orchards by three full block insecticide applications. efforts to reduce insecticide inputs against plum curculio include perimeter row sprays, particularly after petal fall, to control immigrating adults. the odor-baited trap tree approach represents a new reduced input strat ... | 2008 | 18767740 |
| phylogeography of the bark beetle dendroctonus mexicanus hopkins (coleoptera: curculionidae: scolytinae). | dendroctonus mexicanus is polyphagous within the pinus genus and has a wide geographical distribution in mexico and guatemala. we examined the pattern of genetic variation across the range of this species to explore its demographic history and its phylogeographic pattern. analysis of the mtdna sequences of 173 individuals from 25 mexican populations allowed to us identify 53 geographically structured haplotypes. high haplotype and low nucleotide diversities and tajima's d indicate that d. mexica ... | 2008 | 18824110 |
| rapd and mitochondrial dna analysis of the soybean stalk weevil, sternechus subsignatus (coleoptera: curculionidae). | sternechus subsignatus boheman (curculionidae: sternechini) is one of the primary curculionidae species that reduces soybean yield in brazil. initially, outbreaks were reported in southern brazil in 1973; but, more recent, outbreaks were reported in bahia (summer 1997-1998) and maranhão (summer 2003-2004), two states in northeastern brazil. a putative related species, s. pinguis (fabricius), was first detected in salta province, argentina. the objective of this study was to evaluate intraspecifi ... | 2008 | 18826663 |
| multiple-species natural enemy approach for biological control of alfalfa snout beetle (coleoptera: curculionidae) using entomopathogenic nematodes. | multiple-species natural enemy approach for the biological control of the alfalfa snout beetle, otiorhynchus ligustici (l.) (coleoptera: curculionidae), was compared with using single-species of natural enemies in the alfalfa ecosystem by using entomopathogenic nematodes with different dispersal and foraging behaviors. steinernema carpocapsae ny001 (ambush nematode), heterorhabditis bacteriophora oswego (cruiser nematode), and steinernema feltiae valko (intermediate nematode) were applied in sin ... | 2008 | 18950034 |
| effect of irradiation on mating ability in the male sweetpotato weevil (coleoptera: curculionidae). | the sterile insect technique (sit) is widely used for suppressing or eradicating target pest insect populations. the effectiveness of sit depends on the ability of released sterile males to mate with and inseminate wild females. irradiation is the effective manner to sterilize mass-reared insects. the negative impacts of this procedure are not limited to damage on reproductive cells. gamma-radiation damages the epithelial tissue of midgut, which affects the alimentation in insects. irradiated ma ... | 2008 | 18767728 |
| identification of multiple ear-colonizing insect and disease resistance in cimmyt maize inbred lines with varying levels of silk maysin. | ninety four corn inbred lines selected from international center for the improvement of maize and wheat (cimmyt) in mexico were evaluated for levels of silk maysin in 2001 and 2002. damage by major ear-feeding insects [i.e., corn earworm, helicoverpa zea (boddie) (lepidoptera: noctuidae); maize weevil, sitophilus zeamais (motschulsky) (coleoptera: curculionidae); brown stink bug, euschistus servus (say); southern green stink bugs, nezara viridula (l.) (heteroptera: pentatomidae)], and common smu ... | 2008 | 18767760 |
| [occurrence of weevils (insecta: coleoptera) in pet food traded in the metropolitan region of recife, pernambuco state, brazil]. | with the purpose of verifying the occurrence of insect pests in dog food commercialized in the metropolitan region of recife, samples from 15 different pet stores were submitted to the extraction of insects in a berlese-tullgren apparatus. tribolium castaneum (herbst) (tenebrionidae) (55.2%) was the most frequent specie followed by oryzaephilus surinamensis (l.) (cucujidae) (31.3%), rhyzopertha dominica (fabricius) (bostrichidae) (8.9%) and lasioderma serricorne (fabricius) (anobiidae) (4.7%), a ... | 2008 | 19061049 |
| early-season aerial adult colonization and ground activity of pea leaf weevil (coleoptera: curculionidae) in pea as influenced by tillage system. | the pea leaf weevil, sitona lineatus (l.) (coleoptera: curculionidae), is an important pest of pea, pisum sativum l., in northern idaho. previous research revealed greater relative pea leaf weevil abundance and feeding damage in peas grown using conventional-tillage compared with no-tillage practices. however, the effects of tillage practices on early season colonization and activity by the pea leaf weevil on pea are not fully understood. aerial traps and pitfall traps were used to assess adult ... | 2008 | 18950043 |
| extensive proliferation of transposable elements in heritable bacterial symbionts. | we found that insertion sequence (is) elements are unusually abundant in the relatively recently evolved bacterial endosymbionts of maize weevils. because multicopy elements can facilitate genomic recombination and deletion, this is expansion may represent an early stage in the genomic reduction that is common in most ancient endosymbionts. | 2008 | 17981967 |
| high individual variation in pheromone production by tree-killing bark beetles (coleoptera: curculionidae: scolytinae). | aggregation via pheromone signalling is essential for tree-killing bark beetles to overcome tree defenses and reproduce within hosts. pheromone production is a trait that is linked to fitness, so high individual variation is paradoxical. one explanation is that the technique of measuring static pheromone pools overestimates true variation among individuals. an alternative hypothesis is that aggregation behaviour dilutes the contribution of individuals to the trait under selection and reduces the ... | 2008 | 17661002 |
| particle films for managing arthropod pests of apple. | a two-season study showed that a calendar-based spray program to manage arthropod pests with kaolin (60 g/liter) applied at the rate of 450 liters/ha was effective against european apple sawfly, hoplocampa testudinea (klug) (hymenoptera: tenthredinidae); white apple leafhopper, typhlocyba pomaria mcatee (homoptera: cicadellidae); apple red bug, lygidea mendax reuter (heteroptera: miridae); pear plant bug, lygocoris communis (knight) (heteroptera: miridae); and the apple rust mite, aculus schlech ... | 2008 | 18330129 |
| natural occurrence of beauveria bassiana in hypothenemus hampei (coleoptera: curculionidae) populations in unsprayed coffee fields. | three unsprayed coffee farms (farm 1, 2 and 3) were studied for the natural occurrence of the insect pathogenic fungus beauveria bassiana in hypothenemus hampei populations throughout the rainy season of 2004 (july-november) and 2005 (july-december). b. bassiana infections were found during most sampling dates in both years, on all three farms. the b. bassiana infection levels were higher in 2005 than in 2004 with mean prevalence of 12.1% and 2.7%, respectively. no consistent significant differe ... | 2008 | 17854825 |
| microbial control of insect pests in temperate orchard systems: potential for incorporation into ipm. | because of their selectivity and safety, microbial control agents (mcas) appear to be ready-made components of integrated pest management (ipm) systems that do not pose a threat to applicators or the environment and allow other natural enemies to function. control of several orchard pest insects using mcas, including viruses, bacillus thuringiensis, fungi, and entomopathogenic nematodes (epns), have been demonstrated in apple, pear, stone fruits, citrus, and several nut crops. b. thuringiensis i ... | 2008 | 17803454 |
| competition and intraguild predation between the braconid parasitoid bracon hylobii and the entomopathogenic nematode heterorhabditis downesi, natural enemies of the large pine weevil, hylobius abietis. | in biological control programmes introduced natural enemies compete with indigenous enemies for hosts and may also engage in intraguild predation when two species competing for the same prey attack and consume one another. the large pine weevil, hylobius abietis l. (coleoptera: curculionidae), is an important pest of coniferous reforestation in europe. among its natural enemies, the parasitoid bracon hylobii ratz. (hymenoptera: braconidae) and entomopathogenic nematodes have potential as biologi ... | 2009 | 19006580 |
| pine weevil feeding on norway spruce bark has a stronger impact on needle voc emissions than enhanced ultraviolet-b radiation. | plants can respond physiologically to damaging ultraviolet-b radiation by altering leaf chemistry, especially uv absorbing phenolic compounds. however, the effects on terpene emissions have received little attention. we conducted two field trials in plots with supplemented uv-b radiation and assessed the influence of feeding by pine weevils, hylobius abietis l., on volatile emissions from 3-year old norway spruce trees (picea abies l. karst.). we collected emissions from branch tips distal to th ... | 2009 | 18775595 |
| mycobiota associated with the ambrosia beetle scolytodes unipunctatus (coleoptera: curculionidae, scolytinae). | ambrosia beetles (coleoptera: scolytinae) are associated with strictly entomochoric and mutualistic fungi. we studied the mycobiota associated with scolytodes unipunctatus, ambrosia beetles that infest cecropia trees in central america. isolates were characterized using morphology and rdna sequences (its region, lsu, and ssu rdna). four species are described here: raffaelea scolytodis sp. nov. (ophiostomatales), gondwanamyces scolytodis sp. nov., custingophora cecropiae sp. nov., and graphium sp ... | 2009 | 18801429 |
| phylogeographical patterns of a generalist acorn weevil: insight into the biogeographical history of broadleaved deciduous and evergreen forests. | climatic changes during glacial periods have had a major influence on the recent evolutionary history of living organisms, even in temperate forests on islands, where the land was not covered with ice sheets. we investigated the phylogeographical patterns of the weevil curculio sikkimensis (curculionidae), a generalist seed predator of fagaceae plants living in both deciduous oak and evergreen forests of japan. its genetic structure was compared to that of another host-specific seed predator, c. ... | 2009 | 19445688 |
| molecular diagnostic for boll weevil (coleoptera: curculionidae) based on amplification of three species-specific microsatellites. | the boll weevil, anthonomus grandis grandis boheman (coleoptera: curculionidae), is a serious pest of cultivated cotton, gossypium hirsutum l., in the americas, and reinfestation of zones from which they have been eradicated is of perpetual concern. extensive arrays of pheromone traps monitor for reintroductions, but occasionally the traps collect nontarget weevils that can be misidentified by scouts. for example, the congeneric pepper weevil, anthonomus eugenii cano, and other superficially sim ... | 2009 | 19449658 |
| [parisoschoenus obesulus casey (coleoptera: curculionidae) is not a pest of young coconut tree fruits]. | this study aimed to evaluate if parisoschoenus obesulus casey only attacks naturally aborting coconuts and, consequently, is not a pest of young fruits of coconut tree. aiming to test this hypothesis, inflorescences at diverse stages of physiological development were offered to individuals of p. obesulus. the results showed that only aborting fruits were colonized by p. obesulus corroborating the established hypothesis. | 2009 | 19488515 |
| response of cranberry weevil (coleoptera: curculionidae) to host plant volatiles. | the oligophagous cranberry weevil, anthonomus musculus say, causes economic losses to blueberry growers in new jersey because females deposit eggs into developing flower buds and subsequent larval feeding damages buds, which fail to produce fruit. a cost-effective and reliable method is needed for monitoring this pest to correctly time insecticide applications. we studied the behavioral and antennal responses of adult a. musculus to its host plant volatiles to determine their potential for monit ... | 2009 | 19508797 |
| evaluation of natural diatomaceous earth deposits from south-eastern europe for stored-grain protection: the effect of particle size. | the use of diatomaceous earths (des) provides a promising alternative to the use of contact insecticides in stored-product ipm. geographical origin and the physical properties of a given de may affect its insecticidal activity. in the present study, de samples were collected from different locations of south-eastern europe, and their efficacy was evaluated in the laboratory against cryptolestes ferrugineus (stephens) (coleoptera: cucujiidae), sitophilus oryzae (l.) (coleoptera: curculionidae) an ... | 2009 | 19544360 |
| karyology of parthenogenetic weevils (coleoptera, curculionidae): do meiotic prophase stages occur? | we investigated the cytological mechanism of parthenogenesis by analyzing the chromosomes in five weevil species. all examined species are polyploids, four of which: otiorhynchus ovatus, simo variegates, cathormiocerus aristatus, and tropiphorus elevatus possess three haploid sets of chromosomes (3n=33), whereas the fifth, trachyphloeus parallelus, is tetraploid with 44 chromosomes (4n=44). the plates contained 27-31 chromosomes in triploid species and 38, 39, 41 and even 44 in tetraploid t. par ... | 2009 | 19595603 |
| relative susceptibility of haeckeliania sperata (hymenoptera: trichogrammatidae) to pesticides used in citrus and ornamental systems in florida. | haeckeliania sperata pinto is an egg-endoparasitoid of diaprepes abbreviatus l. (coleoptera: curculionidae). we evaluated the relative susceptibility of h. sperata adults to commercially relevant pesticides used in citrus and ornamental production systems. parasitoids were exposed to pesticide residues on leaf surfaces. four concentrations of seven pesticides were tested; concentrations for each pesticide consisted of a dilution series using the label rate for field applications as the starting ... | 2009 | 19610401 |
| effects of herbivory by diaprepes abbreviatus (coleoptera: curculionidae) larvae on four woody ornamental plant species. | the hypothesis that herbivory by diaprepes root weevil larvae reduces leaf gas exchange and biomass was tested on buttonwood (conocarpus erectus l.), surinam cherry (eugenia uniflora l.), mahogany (swietenia mahagoni jacq.), and pond apple (annona glabra l). for surinam cherry, net co2 assimilation, transpiration, and stomatal conductance, but not internal co2 concentration (collectively referred to as leaf gas exchange values), were 7-32% higher in noninfested than infested plants. for buttonwo ... | 2009 | 19610430 |
| biological characteristics of cionus latefasciatus (coleoptera: curculionidae) and effects of temperature on its growth and development. | cionus latefasciatus voss (coleoptera: curculionidae) is one of the most important insect pests on scrophularia ningpoensis hemsl. (scrophulariales: scrophuhrhceae), which is a well-known traditional chinese medicine plant in southeast china. the biological characteristics and effects of temperature on the growth and development of c. latefasciatus were studied in nature, in the greenhouse, and in the laboratory. in the area studied, 9-12 generations of this weevil occurred per year depending on ... | 2009 | 19610417 |
| electroantennogram technique for conotrachelus nenuphar (coleoptera: curculionidae). | reliable electroantennogram (eag) responses were obtained from the plum curculio, conotrachelus nenuphar (herbst), by using a whole body mount with glass electrodes filled with kcl-saturated agcl solution that penetrated the antennal club (recording electrode) and the membrane attached to the cervical sclerite between the thorax and the head (indifferent electrode). known attractive odor sources including extracts of headspace collections of 'stanley' plum and 'empire' apple tissues and a synthe ... | 2009 | 19508798 |
| purification and biochemical characterization of a specific beta-glucosidase from the digestive fluid of larvae of the palm weevil, rhynchophorus palmarum. | a beta-glucosidase was purified from the digestive fluid of the palm weevil rhynchophorus palmarum l. (coleoptera: curculionidae) by chromatography on anion-exchange, gel filtration, and hydrophobic interaction columns. the preparation was shown to be homogeneous on polyacrylamide gels, beta-glucosidase is a monomeric protein with a molecular weight of 58 kda based on its mobility in sds-page and 60 kda based on gel filtration. maximal beta-glucosidase activity occurred at 55 degrees c and ph 5. ... | 2009 | 19611239 |
| comparative acute toxicity of neonicotinoid and pyrethroid insecticides to non-target crayfish (procambarus clarkii) associated with rice-crayfish crop rotations. | most insecticides used to control rice water weevil (lissorhoptrus oryzophilus kuscel) infestations are pyrethroids. however, pyrethroids are highly toxic to non-target crayfish associated with rice-crayfish crop rotations. one solution to the near-exclusive reliance on pyrethroids in a rice-crayfish pest management program is to incorporate neonicotinoid insecticides, which are insect specific and effective against weevils but not extremely toxic to crayfish. this study aimed to take the first ... | 2009 | 19623546 |
| responses of the cabbage seedpod weevil, ceutorhynchus obstrictus (marsham) (coleoptera: curculionidae), to seed treatments of canola (brassica napus l.) with the neonicotinoid compounds clothianidin and imidacloprid. | the cabbage seedpod weevil, ceutorhynchus obstrictus (marsham), is a major pest in the production of canola (brassica napus l.) in north america and europe, and effective population control is often essential for economical crop production. in north america, neonicotinoid insecticides have been used for several years in canola as seed treatments for reducing herbivory by flea beetles. the neonicotinoids clothianidin and imidacloprid were investigated to determine their effects on preimaginal dev ... | 2009 | 19642076 |
| arrestment behavior in the polyphagous tropical root weevil diaprepes abbreviatus. | a semiochemical-based attractant for the tropical root weevil, diaprepes abbreviatus l., has been sought since the introduction of this polyphagous pest to florida in the 1960s. a six-unit wind tunnel apparatus was constructed to allow multiple runs to be conducted simultaneously to test the response of d. abbreviatus adults to volatile and contact semiochemicals. arrestment was measured as the number of weevils stopping and remaining on a target when presented with upwind target choices. no res ... | 2009 | 19610412 |
| comparison of larval development and overwintering stages of the spotted knapweed biological control agents agapeta zoegana (lepidoptera: tortricidae) and cyphocleonus achates (coleoptera: curculionidae) in montana versus eastern europe. | larval development of insects introduced for biological control of invasive weeds may be constrained if the new climate is more extreme than in their native range. we surveyed larval development in agapeta zoegana l. and cyphocleonus achates (fahraeus), two species of biological control insects introduced from eastern europe against spotted knapweed in western north america. we dissected spotted knapweed roots collected from five sites in western montana over 6 yr either in late fall or early sp ... | 2009 | 19689874 |
| field efficacy of entomopathogenic fungi and nematodes targeting caged last-instar plum curculio (coleoptera: curculionidae) in michigan cherry and apple orchards. | the plum curculio (conotrachelus nenuphar herbst) is a key pest of pome and stone fruit in eastern north america. we tested the efficacy of five pathogens over the course of three seasons in 10 michigan apple and cherry orchards, with introductions of larvae to caged pots containing pathogen-treated soil. the nematode steinernema riobrave was the most effective pathogen in the 2 yr it was tested, but only in soils with the highest sand content (81-88%) and when it was applied 1 h or 5 d after la ... | 2009 | 19689891 |
| flight activity of sitophilus oryzae (l) and sitophilus zeamais motsch (coleoptera: curculionidae) and its relationship with susceptibility to insecticides. | insect-pest mobility can influence insect susceptibility to the insecticides used to control them. the objective of this work was to evaluate the flight activity of sitophilus oryzae (l) and sitophilus zeamais motsch populations reared on corn and wheat grains, and its relationship with insecticide susceptibility. unsexed adult insects with ages between 10 and 20 days were placed on a plastic tray. a 40-watt incandescent light bulb was positioned at a 50 cm height relative to the tray. flight ac ... | 2009 | 19618059 |
| efficacy of two systemic insecticides injected into loblolly pine for protection against southern pine bark beetles (coleoptera: curculionidae). | we evaluated the efficacy of systemic insecticides emamectin benzoate and fipronil for preventing mortality of individual loblolly pines, pinus taeda l., as a result of attacks by southern pine bark beetles (coleoptera: curculionidae, scolytinae) for two consecutive years in mississippi (2005-2006) and alabama (2006-2007). trees were injected once in the spring of 2005 (mississippi) or 2006 (alabama) and then were baited with species-specific bark beetle lures several weeks later. the southern p ... | 2009 | 19610420 |
| pyrethroid resistance mediated by enzyme detoxification in listronotus maculicollis (coleoptera: curculionidae) from connecticut. | in 2009, pyrethroid resistance was confirmed for seven "annual bluegrass weevil" listronotus maculicollis kirby (coleoptera: curculionidae) adult populations from southern new england. the mechanisms responsible for conferring this resistance were unknown. in this study, topical application bioassays with bifenthrin and bifenthrin combined with synergists affecting three detoxification systems were conducted on four field-collected adult populations of l. maculicollis from connecticut to determi ... | 2009 | 19610439 |
| development of binomial sequential sampling plans for forecasting listronotus maculicollis (coleoptera: curculionidae) larvae based on the relationship to adult counts and turfgrass damage. | binomial sequential sampling plans were developed to forecast weevil listronotus maculicollis kirby (coleoptera: curculionidae), larval damage to golf course turfgrass and aid in the development of integrated pest management programs for the weevil. populations of emerging overwintered adults were sampled over a 2-yr period to determine the relationship between adult counts, larval density, and turfgrass damage. larval density and composition of preferred host plants (poa annua l.) significantly ... | 2009 | 19610454 |
| genetic structure of japanese populations of xylosandrus brevis (curculionidae: scolytinae). | we examined the genetic structure of populations of an ambrosia beetle, xylosandrus brevis (eichhoff) (curculionidae: scolytinae), to understand its colonization dynamics. we collected specimens from 20 sites in japan and studied the genetic structure of these populations using portions of the mitochondrial cytochrome oxidase i gene (coi). a phylogenetic analysis showed three distinct lineages (clades a, b, and c) within x. brevis. clade a had 65 haplotypes from all the populations, except for p ... | 2009 | 19689915 |
| dna taxonomy and phylogeography of beetles of the falkland islands (islas malvinas). | the falkland biota are generally considered to be derived from the nearest continental source in patagonian south america, yet they harbor many endemic species whose taxonomy and evolutionary history remains insufficiently understood. comprehensive sampling of coleoptera over two field seasons from numerous sites across the falkland archipelago produced representatives of 55 morphologically separable species, assigned to 35 genera and 13 families of coleoptera. partial mitochondrial cytochrome o ... | 2009 | 19723584 |
| factors affecting pheromone release by scyphophorus acupunctatus (coleoptera: curculionidae). | scyphophorus acupuncatus gyllenhal is considered to be the most significant pest of cultivated agaves in the world. recent studies on the chemical ecology of this weevil have shown that males release a pheromone that attracts both sexes. in this study, we investigated the effect of feeding, aging, photoperiod, and time of day on pheromone release by s. acupuncatus males under laboratory conditions. the pheromone released by individual males was sampled using solid-phase microextraction and analy ... | 2009 | 19825297 |
| on automatic bioacoustic detection of pests: the cases of rhynchophorus ferrugineus and sitophilus oryzae. | the present work reports research efforts toward development and evaluation of a unified framework for automatic bioacoustic recognition of specific insect pests. our approach is based on capturing and automatically recognizing the acoustic emission resulting from typical behaviors, e.g., locomotion and feeding, of the target pests. after acquisition the signals are amplified, filtered, parameterized, and classified by advanced machine learning methods on a portable computer. specifically, we in ... | 2009 | 19736784 |
| first in line or first in time? effects of settlement order and arrival date on reproduction in a group-living beetle dendroctonus ponderosae. | 1. in group-living organisms, individuals that initiate aggregations, termed pioneers, may suffer higher mortality costs than individuals that join established aggregations. here we examine the hypothesis that aggregation initiators achieve higher reproductive success in the early phases of colonization, potentially through lower competition and increased access to the resource (finder's advantage), and that this benefit is sufficient to outweigh the costs of pioneering. 2. we also examine the r ... | 2009 | 19292705 |
| flight take-off and walking behavior of insecticide-susceptible and - resistant strains of sitophilus zeamais exposed to deltamethrin. | insects have evolved a variety of physiological and behavioral responses to various toxins in natural and managed ecosystems. however, insect behavior is seldom considered in insecticide studies although insects are capable of changing their behavior in response to their sensory perception of insecticides, which may compromise insecticide efficacy. this is particularly serious for insect pests that are physiologically resistant to insecticides since insecticide avoidance may further compromise t ... | 2009 | 19302721 |
| ambrosiella beaveri, sp. nov., associated with an exotic ambrosia beetle, xylosandrus mutilatus (coleoptera: curculionidae, scolytinae), in mississippi, usa. | xylosandrus mutilatus is an asian ambrosia beetle that has recently established in mississippi, texas, alabama, and possibly florida, usa. we investigated the fungi associated with the mycangia (specialized fungus-transporting structures) of x. mutilatus in mississippi. mycangia consistently yielded an ambrosiella sp. which was subsequently found to be closely related to, but distinct from, other ambrosiella species affiliated with ceratocystis. this ambrosiella is described herein as ambrosiell ... | 2009 | 19319658 |
| geographic distribution and regional impacts of oxyops vitiosa (coleoptera: curculionidae) and boreioglycaspis melaleucae (hemiptera: psyllidae), biological control agents of the invasive tree melaleuca quinquenervia. | the invasive tree melaleuca quinquenervia (cav.) blake is widely distributed throughout peninsular florida and poses a significant threat to species diversity in the wetland systems of the everglades. mitigation of this threat includes the areawide release campaign of the biological control agents oxyops vitiosa pascoe and boreioglycaspis melaleucae moore. we summarize the results of this release effort and quantify the resulting geographic distribution of the herbivores as well as their regiona ... | 2009 | 19689893 |
| genetic constitution of parthenogenetic form of polydrusus inustus (coleoptera: curculionidae)--hints of hybrid origin and recombinations. | asexual reproduction among insects may arise spontaneously, as a result of infectious agents or hybridization between phylogenetically distinct organisms. polyploidy, which may be the result of auto- or allopoliploidization (also associated with hybridization), is often connected with parthenogenesis. however, all studied parthenogens of weevils were apomictic, rare meiotic stages have been observed in a few of them what could suggests in their genomes besides the mutational changeability also r ... | 2009 | 19777958 |
| systemic insecticides for control of black vine weevil (coleoptera: curculionidae) in container- and field-grown nursery crops. | black vine weevils, otiorhynchus sulcatus (f.) (coleoptera: curculionidae), are serious pests of container- and field-grown nursery crops. management programs usually target the larval stage in container-grown plants and the adults in field-grown plants. we tested several new systemic insecticides for efficacy against black vine weevil in container-grown sedum spp. and field-grown taxus spp. in 2006 and 2007, clothianidin, dinotefuran, and chlorantraniliprole were applied as surface drenches to ... | 2009 | 19610404 |
| effects of gallery density and species ratio on the fitness and fecundity of two sympatric bark beetles (coleoptera: curculionidae). | interspecific interactions among tree-killing bark beetle species may have ecologically important consequences on beetle population dynamics. using two tree-killing beetle species (dendroctonus brevicomis and d. frontalis), we performed observational and experimental studies to verify cross-attraction and co-colonization under field conditions in northern arizona and test the effects of gallery density and species ratio on response variables of average gallery length, offspring size (progeny fit ... | 2009 | 19508772 |
| bacterial community and nitrogen fixation in the red turpentine beetle, dendroctonus valens leconte (coleoptera: curculionidae: scolytinae). | the red turpentine beetle, dendroctonus valens leconte (coleoptera: curculionidae: scolytinae), colonizes all pines species within its native range throughout north and central america. recently, this species was accidentally introduced to china, where it has caused severe damage in pine forests. it belongs to a group of beetles that spend most of their lives between the tree bark and sapwood, where it feeds on phloem: a poor substrate with very low nutritional value of nitrogen and toxic proper ... | 2009 | 19543937 |
| occurrence of trichosirocalus horridus (coleoptera: curculionidae) on native cirsium altissimum versus exotic c. vulgare in north american tallgrass prairie. | postrelease studies can provide data with which to evaluate expectations based on prerelease tests of biological control insects. in 2004, we observed trichosirocalus horridus panzer (coleoptera: curculionidae), the rosette weevil introduced into north america against eurasian thistles, feeding on native tall thistle, cirsium altissimum l. spreng., in tallgrass prairie. in this study, we examined the rosette weevil's use of tall thistle, compared with its use of the co-occurring exotic bull this ... | 2009 | 19508782 |
| volatiles released from vaccinium corymbosum were attractive to aegorhinus superciliosus (coleoptera: curculionidae) in an olfactometric bioassay. | the objective of this study was to evaluate the role of host volatiles in the relationship between a blueberry plant vaccinium corymbosum l. and the raspberry weevil aegorhinus superciliosus (guérin) (coleoptera: curculionidae), the principal pest of blueberry in the south of chile. volatiles from the aerial part of different phenological stages of the host were collected on porapak q and analyzed by coupled gas chromatography-mass spectrometry (gc-ms). several chemical groups were identified in ... | 2009 | 19508787 |
| a folded and functional synthetic pa1b: an interlocked entomotoxic miniprotein. | pa1b (pea albumin 1, subunit b) is a hydrophobic, 37-amino acid miniprotein isolated from pea seeds (pivum sativum), crosslinked by three interlocked disulfide bridges, signature of the ick (inhibitory cystine-knot) family. it acts as an entomotoxic factor against major insect pests in stored crops and vegetables, making it a promising bioinsecticide. here we report an efficient and simple protocol for the production of large quantities of highly pure, biologically active synthetic pa1b. the fea ... | 2009 | 19399851 |
| acorn crop size and pre-dispersal predation determine inter-specific differences in the recruitment of co-occurring oaks. | the contribution of pre-dispersal seed predation to inter-specific differences in recruitment remains elusive. in species with no resistance mechanisms, differences in pre-dispersal predation may arise from differences in seed abundance (plant satiation) or in the ability of seeds to survive insect infestation (seed satiation). this study aimed to analyse the impact of pre-dispersal acorn predation by weevils in two co-occurring mediterranean oaks (quercus ilex and quercus humilis) and to compar ... | 2009 | 19544074 |
| potential of "lure and kill" in long-term pest management and eradication of invasive species. | "lure and kill" technology has been used for several decades in pest management and eradication of invasive species. in lure and kill, the insect pest attracted by a semiochemical lure is not "entrapped" at the source of the attractant as in mass trapping, but instead the insect is subjected to a killing agent, which eliminates affected individuals from the population after a short period. in past decades, a growing scientific literature has been published on this concept. this article provides ... | 2009 | 19610395 |
| woody stem galls interact with foliage to affect community associations. | gall wasps (hymenoptera: cynipidae) hijack the physiology of their host plant to produce galls that house wasps throughout their immature stages. the gall-maker-host plant interaction is highly evolved, and galls represent an extended phenotype of the gall wasp. we evaluated two-way interactions between stem galls produced by dryocosmus kuriphilus yasumatsu on castanea spp. (fagales: fagaceae) and foliage directly attached to galls (gall leaves) using gall leaf excision experiments and herbivore ... | 2009 | 19389291 |
| comparisons of boll weevil (coleoptera: curculionidae) pheromone traps with and without kill strips. | boll weevil, anthonomus grandis grandis boheman (coleoptera: curculionidae), eradication programs typically equip pheromone traps with an insecticide-impregnated kill strip. these strips are intended to kill captured insects, thereby simplifying trap servicing and reducing the loss of weevils from predation and escape. however, the effectiveness of kill strips has not been extensively evaluated. we examined the influences of kill strips on weevil captures, trap servicing, and the incidences of w ... | 2009 | 19253635 |
| artificial substrates for oviposition and larval development of the pepper weevil (coleoptera: curculionidae). | the pepper weevil, anthonomus eugenii cano (coleoptera: curculionidae), is a major pest of cultivated peppers (capsicum spp.) and other cultivated and wild species within the family solanaceae. laboratory study of this insect, as well as its biological control agents, will be greatly facilitated by an artificial rearing system that does not rely on pepper fruit. an egg collection method and amendments to a standard larval diet were investigated for use in the rearing of this weevil. spherical sa ... | 2009 | 19253644 |
| billbug (coleoptera: curculionidae) species composition, abundance, seasonal activity, and developmental time in florida. | billbugs (coleoptera: curculionidae: sphenophorus spp.) are common pests whose damage is often misdiagnosed on turfgrass in the united states. consequently, florida turfgrass managers have been struggling to satisfactorily control billbug outbreaks. thus, we sought to determine the species complex, abundance, seasonality, and fecundity of key sphenophorus spp. from field collections, and quantify duration of developmental and daily activity periods through greenhouse rearing tests. from january ... | 2009 | 19253650 |
| temporal lags and overlap in the diversification of weevils and flowering plants. | the extraordinary diversity of herbivorous beetles is usually attributed to coevolution with angiosperms. however, the degree and nature of contemporaneity in beetle and angiosperm diversification remain unclear. here we present a large-scale molecular phylogeny for weevils (herbivorous beetles in the superfamily curculionoidea), one of the most diverse lineages of insects, based on approximately 8 kilobases of dna sequence data from a worldwide sample including all families and subfamilies. est ... | 2009 | 19365072 |
| effect of weather on ips typographus (coleoptera curculionidae) phenology, voltinism, and associated spruce mortality in the southeastern alps. | summer drought associated with high temperatures recorded in the last few years has given rise to outbreaks of bark beetles developing in weakened host trees. the aim of this study was to investigate the possible weather effect on the biology of and damage caused by ips typographus l. in the southeastern alps. the study was carried out recording temperature (1962-2007), precipitation (1922-2007), and the damage caused by i. typographus (1993-2007). in addition, data from pheromone-baited traps ( ... | 2009 | 19389278 |
| repellent activity of alligator pepper, aframomum melegueta, and ginger, zingiber officinale, against the maize weevil, sitophilus zeamais. | the repellent activity of alligator pepper, aframomum melegueta, and ginger, zingiber officinale (zingiberaceae), against the maize weevil, sitophilus zeamais (coleoptera: curculionidae), was investigated in four-way olfactometer bioassays. results showed that vacuum distilled a. melegueta and z. officinale extracts were repellent towards adult s. zeamais both in the absence and the presence of maize, zea mays, grains. bioassay-guided liquid chromatographic fractionation of the distillates showe ... | 2009 | 19394981 |
| rnai in the cereal weevil sitophilus spp: systemic gene knockdown in the bacteriome tissue. | the weevils sitophilus spp. are among the most important cosmopolitan pests of stored cereal grains. however, their biology and physiology are poorly understood, mainly because the insect developmental stages take place within cereal grains and because of the lack of gene specific molecular manipulation. | 2009 | 19445662 |
| electrophysiological and behavioral responses of dendroctonus valens (coleoptera: curculionidae: scolytinae) to four bark beetle pheromones. | the red turpentine beetle, dendroctonus valens leconte (coleoptera: curculionidae: scolytinae), has caused extensive mortality of pinus tabuliformis carrière in north central china. the electrophysiological and behavioral activities of the four bark beetle pheromones, frontalin, exo-brevicomin, trans-verbenol, and cis-verbenol, singly or in combination with host-produced kairomones, were tested on red turpentine beetles. both sexes showed a consistent electrophysiological response to the four te ... | 2009 | 19389297 |
| scelianoma elydimorpha, a new genus and new species of entimine weevil from southwestern puerto rico (coleoptera: curculionidae, entiminae). | scelianoma elydimorpha franz & girón, new genus and new species, an entimine weevil endemic to southwestern puerto rico, is described and illustrated in detail, and assigned to the tribe eustylini (curculionidae: entiminae). scelianoma is distinguished from related taxa by the following diagnostic features: shape narrowly elongate, length/width ratio 2.8-3.5; integument with densely arranged scales; pronotum without conspicuous sculpturing; male metatibia with row of 5-7 teeth, each tooth with a ... | 2009 | 19488511 |
| effect of geographic isolation on genetic differentiation in dendroctonus pseudotsugae (coleoptera: curculionidae). | genetic structure of phytophagous insects has been widely studied, however, relative influence of the effect of geographic isolation, the host plant or both has been subject of considerable debate. several studies carried out on bark beetles in the genus dendroctonus evaluated these factors; nonetheless, recent evidence has shown that genetic structuring is a more complex process. our goal was to examine the effect of geographic isolation on genetic structure of the douglas-fir beetle dendrocton ... | 2009 | 19490169 |
| specificity and redundancy in the olfactory system of the bark beetle ips typographus: single-cell responses to ecologically relevant odors. | we screened 150 olfactory sensilla in single-sensillum recordings to unravel the mechanisms underlying host selection in the spruce bark beetle, ips typographus (coleoptera: curculionidae: scolytinae). odor stimuli comprised of pheromone (various bark beetle spp.), host, and non-host compounds elicited strong and selective responses from 106 olfactory receptor neurons (orns), 45 of which were tuned to pheromone compounds, 37 to host compounds, and 24 to non-host volatiles (nhv). in addition, 26 ... | 2009 | 19233334 |
| pyrethroid resistance in populations of listronotus maculicollis (coleoptera: curculionidae) from southern new england golf courses. | topical application bioassays of bifenthrin and lambda-cyhalothrin were conducted on field-collected populations of listronotus maculicollis kirby (coleoptera: curculionidae) from eight southern new england golf courses, six in connecticut, one in massachusetts, and one in rhode island. concentrations versus mortality regression lines were estimated to compare the ld50 values and resistance ratios for each insecticide and each population. the ld50 ranges for bifenthrin and lambda-cyhalothrin wer ... | 2009 | 19253659 |
| development of an efficient pheromone-based trapping method for the banana root borer cosmopolites sordidus. | the banana root borer cosmopolites sordidus (germar) (coleoptera: curculionidae) is a major pest of bananas throughout the world. chemical control is both undesirable and expensive, where biological control alternatives are limited, and pheromone-based trapping results in low captures. in this study, several important factors that affect pheromone-based catches, such as trap type, trap dimensions, and color and position of the traps, were optimized. ground traps were found to be superior to ramp ... | 2009 | 19139959 |
| efficacy of verbenone for protecting ponderosa pine stands from western pine beetle (coleoptera: curculionidae: scolytinae) attack in california. | the western pine beetle, dendroctonus brevicomis leconte (coleoptera: curculionidae: scolytinae), is a major cause of ponderosa pine, pinus ponderosa dougl. ex laws., mortality in much of western north america. currently, techniques for managing d. brevicomis infestations are limited. verbenone (4,6,6-trimethylbicyclo [3.1.1] hept-3-en-2-one) is an antiaggregation pheromone of several dendroctonus spp., including d. brevicomis, and it has been registered as a biopesticide for control of mountain ... | 2009 | 19886449 |
| curative activity of insecticides against plum curculio (coleoptera: curculionidae) in tart cherries. | tart cherry, prunus cerasus l. variety montmorency, fruit were infested with plum curculio, conotrachelus nenuphar (herbst) (coleoptera: curculionidae), and treated with insecticides to target late instars, neonates, and eggs. the organophosphates azinphos-methyl and phosmet and the neonicotinoid thiamethoxam reduced larval emergence rates by >90% for all life stage targets; after >30 d, few surviving larvae were found inside fruit. acetamiprid and thiacloprid also had curative activity and yiel ... | 2009 | 19886451 |
| effect of planting date on lissorhoptrus oryzophilus (coleoptera: curculionidae) density-yield relationship on rice in southeastern texas. | results of planting date and insecticide efficacy experiments targeting lissorhoptrus oryzophilus kuschel (coleoptera: curculionidae) on rice, oryza sativa l., in southeastern texas between 2002 and 2007 were used to determine density-yield relationships as a function of planting date. soil core samples were collected on two dates during main crop development to estimate immature l. oryzophilus populations followed by main and ratoon crop harvests. analysis of covariance (ancova) revealed that p ... | 2009 | 19736766 |
| reconsiderations on evaluating methodology of repellent effects: validation of indices and statistical analyses. | many pest repellents are in household use, and a variety of procedures, indices, and statistical tests have been used to examine their effectiveness. however, the effect of action mechanism on these indices has not been adequately discussed. in addition, the interreplication variance of data have not been taken into account in some cases. this study considered the validity of tests used to evaluate repellents and proposed methods to statistically evaluate them. first, various repellents with dif ... | 2009 | 19886465 |
| volatiles from a mite-infested spruce clone and their effects on pine weevil behavior. | induced responses by norway spruce (picea abies) seedlings to feeding damage by two mite species were studied by analyzing the volatiles emitted during infestation. four specimens of a norway spruce (picea abies l.) clone were infested with mites of nalepella sp., another four with oligonychus ununguis, and four were kept mite-free as controls. after a year of infestation, spruce volatiles were collected, analyzed, and identified using spme-gc-ms. in addition, enantiomers of chiral limonene and ... | 2009 | 19902304 |
| natural selection drives the fine-scale divergence of a coevolutionary arms race involving a long-mouthed weevil and its obligate host plant. | one of the major recent advances in evolutionary biology is the recognition that evolutionary interactions between species are substantially differentiated among geographic populations. to date, several authors have revealed natural selection pressures mediating the geographically-divergent processes of coevolution. how local, then, is the geographic structuring of natural selection in coevolutionary systems? | 2009 | 19941669 |
| [susceptibility of the parasitoid phymastichus coffea lasalle (hymenoptera: eulophidae) to beauveria bassiana under laboratory conditions]. | the coffee berry borer, hypothenemus hampei (ferrari) (coleoptera: curculionidae), is the most important coffee pest worldwide. beauveria bassiana is a generalist entomopathogenic fungus widely used by coffee farmers to control this pest and phymastichus coffea lasalle (hymenoptera: eulophidae) is an african endoparasitoid of h. hampei adults, recently imported to several latin american and caribbean countries to aid in the coffee berry borer control. the objective of this study was to determine ... | 2009 | 19943017 |
| evaluation of multiple funnel traps and stand characteristics for estimating western pine beetle-caused tree mortality. | the western pine beetle, dendroctonus brevicomis leconte (coleoptera: curculionidae: scolytinae), is a major cause of ponderosa pine, pinus ponderosa dougl. ex laws., mortality in much of western north america. this study was designed to quantify relationships between western pine beetle trap catches [including those of its primary invertebrate predator temnochila chlorodia (mannerheim) (coleoptera: trogositidae)], and levels of tree mortality attributed to western pine beetle at 44 trapping sit ... | 2009 | 20069846 |
| presence and significance of bacillus thuringiensis cry proteins associated with the andean weevil premnotrypes vorax (coleoptera: curculionidae). | the andean weevil premnotrypes vorax represents an important cause of damage to colombian potato crops. due to the impact of this plague on the economy of the country, we searched for new alternatives for its biological control, based on the entomopathogenic bacteria bacillus thuringiensis. a total of 300 b. thuringiensis strains obtained from potato plantations infested with p. vorax were analyzed through crystal morphology, sds-page, pcr and bioassays. we used site-directed mutagenesis to modi ... | 2009 | 20073348 |
| do arms races punctuate evolutionary stasis? unified insights from phylogeny, phylogeography and microevolutionary processes. | one of the major controversies in evolutionary biology concerns the processes underlying macroevolutionary patterns in which prolonged stasis is disrupted by rapid, short-term evolution that leads species to new adaptive zones. recent advances in the understanding of contemporary evolution have suggested that such rapid evolution can occur in the wild as a result of environmental changes. here, we examined a novel hypothesis that evolutionary stasis is punctuated by co-evolutionary arms races, w ... | 2009 | 19732333 |
| resistance among cultivated sunflower germplasm to stem-infesting pests in the central great plains. | a 7-yr field study evaluated 61 oilseed sunflower, helianthus annuus l., accessions and 31 interspecific crosses for resistance to attack by naturally occurring populations of three stem-infesting pests, the sunflower stem weevil, cylindrocopturus adspersus (leconte) (coleoptera: curculionidae); a longhorned beetle, dectes texanus leconte (coleoptera: cerambycidae); and a root boring moth, pelochrista womonana (kearfott) (lepidoptera: tortricidae), at two locations in the central great plains. g ... | 2009 | 19610449 |
| impacts of seeding rate on interactions between rice and rice water weevils. | the rice water weevil, lissorhoptrus oryzophilus kuschel, is the most widely distributed and destructive early season insect pest of rice, oryza sativa l., in the united states. economic losses result primarily from feeding by the larval stage of this insect on the roots of flooded rice plants. prior studies suggest that infestations of rice water weevil larvae are more severe at low plant densities. moreover, because feeding by the rice water weevil reduces rice plant tillering, a process parti ... | 2009 | 19886448 |
| pepper weevil attraction to volatiles from host and nonhost plants. | the location of wild and cultivated host plants by pepper weevil (anthonomus eugenii cano) may be aided by visual cues, the male-produced aggregation pheromone, herbivore-induced, or constitutive host plant volatiles. the attractiveness of constitutive plant volatiles to pioneer weevils is important in understanding, and perhaps controlling, dispersal of this insect between wild and cultivated hosts. ten-day-old male and 2- and 10-day-old female weevils were tested in short-range y-tube assays. ... | 2009 | 19791617 |
| insects and allies associated with bromeliads: a review. | bromeliads are a neotropical plant family (bromeliaceae) with about 2,900 described species. they vary considerably in architecture. many impound water in their inner leaf axils to form phytotelmata (plant pools), providing habitat for terrestrial arthropods with aquatic larvae, while their outer axils provide terraria for an assemblage of fully terrestrial arthropods. many bromeliads are epiphytic.dominant terrestrial arthropods with aquatic larvae inhabiting bromeliad phytotelmata are typicall ... | 2009 | 20209047 |
| take me to your leader: does early successional nonhost vegetation spatially inhibit pissodes strobi (coleoptera: curculionidae)? | the spatial influences of host and nonhost trees and shrubs on the colonization patterns of white pine weevil pissodes strobi (peck) were studied within a stand of planted interior hybrid spruce [picea glauca (moench) voss x picea engelmannii (parry) ex engelm.]. planted spruce accounted for one third of all trees within the stand, whereas the remaining two thirds were comprised of early-successional nonhost vegetation, such as alder (alnus spp.), paper birch (betula papyrifera marsh.), black co ... | 2009 | 19689899 |
| effects of biological control of rice weevil by anisopteromalus calandrae with a population of two aspergillus spp. | in this study, we assessed the interaction occurring between the rice weevil and two storage molds (aspergillus candidus link and aspergillus niger van tiegem) that prefer different moisture regimens under rice storage conditions. rice weevil induced rapid population growth in both of the storage molds. the colony forming units (cfus) of a. candidus and a. niger peaked at 10(9.00 +/- 0.02) and 10(7.72 +/- 0.03)/g, respectively. all of the rice grains were infested with the molds and eventually d ... | 2009 | 19791605 |
| evidence of contact pheromone use in mating behavior of the raspberry weevil (coleoptera: curculionidae). | numerous studies of insect species have shown that a subset of female cuticular hydrocarbons is used as short-range or contact pheromones. here, we studied the possible use of contact pheromones in the mating behavior of the weevil aegorhinus superciliosus, a native species of chile. males mounted females only after antennal contact with the female's cuticle, and only 33% of the males attempted to mate with dead females washed with solvent. when a glass rod (dummy) was coated with female cuticul ... | 2009 | 19791614 |
| [species diversity of ground-dwelling beetles on northern slope of daba mountain, china]. | by using pitfall trapping, the species composition and quantitative distribution of ground-dwelling beetles in man-made plantations in forest farm (mpff), secondary natural forests in farmland (sff), and man-made plantations in farmland (mpf) on northern slope of daba mountain were analyzed, and detrended correspondence analysis and cluster analysis were adopted to study the similarity of the species composition and quantitative distribution of the beetles among the three forest types. 1094 indi ... | 2009 | 19795659 |
| host preference and attack pattern of dendroctonus rhizophagus (coleoptera: curculionidae: scolytinae): a bark beetle specialist on pine regeneration. | pine seedlings and saplings are seldom attacked by bark beetles of the genus dendroctonus. however, dendroctonus rhizophagus (coleoptera: curculionidae: scolytinae) thomas and bright specifically attacks pine seedlings and causes conspicuous mortality in naturally regenerated stands in the sierra madre occidental, northern mexico. we evaluated the host preference and attack of d. rhizophagus under field conditions. we tried to establish any relationship between tree growth or host size and the n ... | 2009 | 19689900 |
| biological control of the red palm weevil, rhynchophorus ferrugineus (olivier) (coleoptera: curculionidae) by the parasitoid mite, rhynchopolipus rhynchophori (ewing) (acarina: podapolipidae). | the parasitoid mite, rhynchopolipus rhynchophori was released against the red palm weevil rhynchophorus ferrugineus stages. released of this mite applied at four levels of treatment, a (30 parasitic mites: 1 prey), b (60 parasitic mites: 1 prey), c (90 parasitic mites: 1 prey) and d (120 parasitic mites: 1 prey). the parasitoid mites successfully suppressed population density of the red palm weevil, r. ferrugineus stages within two weeks. the killing of different developmental stages of the red ... | 2009 | 19795774 |
| [attraction of sphenophorus levis vaurie adults (coleoptera: curculionidae) to vegetal tissues at different conservation levels]. | the occurrence of the sugarcane weevil sphenophorus levis vaurie is important in sugarcane in some regions in brazil. damage is caused by the larvae as they bore into the nodes and can reach 30 ton/ha/year. many control alternatives have been attempted, but none were satisfactory, except for the use of toxic baits. therefore, it is necessary to optimize their efficiency or to propose new techniques. the objective of the current study was to evaluate the attractiveness of adults of s. levis to su ... | 2009 | 20098932 |
| application of semiochemicals to assess the biodiversity of subcortical insects following an ecosystem disturbance in a sub-boreal forest. | from 2000 through 2003 we used semiochemical-baited traps in northeastern minnesota, usa, to assess changes in assemblages of subcortical forest insects after a catastrophic wind storm in 1999 and subsequent (1999-2000) fuel-reduction activities (salvage-logging and prescribed-burning). we determined the regional efficacy of fifteen semiochemical blends (pheromones and kairomones) as attractants for target and non-target subcortical insect species (coleoptera: anthribidae, buprestidae, cerambyci ... | 2009 | 20066478 |
| [persea schiedeana (lauraceae), a new host of heilipus lauri boheman (coleoptera: curculionidae) in veracruz, mexico]. | the presence of the molytinae heilipus lauri boheman is reported for the first time attacking fruits of persea schiedeana, commonly called 'chinene' in huatusco and zongolica, state of veracruz, mexico. | 2009 | 20098937 |
| isolation and characterization of 16 microsatellite loci in the mountain pine beetle, dendroctonus ponderosae hopkins (coleoptera: curculionidae: scolytinae). | we isolated 16 polymorphic microsatellite loci in the mountain pine beetle (dendroctonus ponderosae hopkins) and developed conditions for amplifying these markers in four multiplex reactions. three to 14 alleles were detected per locus across two sampled populations. observed and expected heterozygosities ranged from 0.000 to 0.902 and from 0.100 to 0.830, respectively. three loci deviated from hardy-weinberg equilibrium in one sampled population. one of these loci may be sex linked. these marke ... | 2009 | 21564842 |
| description of new dryocoetes (coleoptera, curculionidae, scolytinae) speciesfrom afghanistan and northern india and redescription of scolytoplatypus kunala strohm. | a new bark beetle species, dryocoetes brownei from northern india and afghanistan, is described as a new to science and redescription of scolytoplatypus kunala strohmeyer, 1908, previously known only from the female holotype, is provided. | 2010 | 21594179 |
| the external morphology of austroplatypus incompertus (schedl) (coleoptera, curculionidae, platypodinae). | previous descriptions of adult austroplatypus incompertus (schedl) are completed by the addition of descriptions and illustrations of the adults and, in particular, their maxillary palps. i describe and illustrate the non-adult phases of the life cycle and provide a key to the larval instars. the sexual dimorphism of austroplatypus incompertus is atypical and includes a latitudinal cline which obeys bergmann's rule. the taxonomic position of the genus within the platypodinae is clarified. platyp ... | 2010 | 21594175 |