| development of a biochemical profile for mass-reared boll weevils (coleoptera: curculionidae). | | 1976 | 3385 |
| oxygen uptake in male and female boll weevils, anthonomus grandis boheman (coleoptera: curculionidae) of the ebony strain fed a laboratory diet. | | 1976 | 4277 |
| [comparative study of the glycosidases of 2 lepidoptera wood-eating cossidae (cossus cossus l., and zeuzera pyrina l.) and various wood-eating coleoptera]. | the authors present here the results of their research concerning the study of the osidases of the caterpillars cossus cossus l. and zeuzera pyrina l. (lepidoptera cossidae). its enzyme equipment shows very important differences compared to the different species of scolytidae, cerambycidae, curculionidae and buprestidae. the differences are lie especially in the absence of some osidases acting on polysaccharides (hémicelluloses and cellulose). | 1977 | 410512 |
| evidence of a chemotactic substance in the spermathecal gland of the female boll weevil (coleoptera: curculionidae). | | 1978 | 564566 |
| genotypes of esterase ii determined from frass of anthonomus grandis boh. (coleoptera, curculionidae). | esterase ii was separated, using gel electrophoresis, from the frass of the cotton boll weevil, allowing genotyping of the individual weevil. the method and its application are discussed. | 1977 | 603619 |
| the ultrastructure and function of follicle cells in foucartia squamulata (herbst) (curculionidae). | the follicle cells of foucartia squamulata are involved in the formation of both vitelline membrane and chorion. precursors for these egg coverings are synthesized by the rough endoplasmic reticulum and condensed within dictyosomes. the vitelline membrane and the chorion appear on the oocyte surface simultaneously, which is an unusual phenomenon for insects. the follicular epithelium has not been found to contribute to vitellogenesis in the species under study. | 1978 | 657249 |
| chromosomal polymorphism in lepidospyris demissus (coleoptera, curculionidae). | the diploid number of chromosomes in lepidospyris demissus is 22 including a pair of sex-chromosomes (xy). however, in its polymorphic forms the diploid number is 23 with three sex-chromosomes (x,yy). | 1978 | 751785 |
| esterases of laboratory-reared and field-collected cotton boll weevils, anthonomus grandis boh.: polymorphism of adult esterases and formal genetics of esterase ii. | the esterases of the cotton boll weevil were separated by polyacrylamide gel electrophoresis into four major regions. these were named est i-iv in order of migration from anode to origin. polymorphism was observed in all regions. the est ii region was shown to consist of no more than two bands (fast and slow). the inheritance of the fast and slow bands of est ii was demonstrated to be controlled by codominant autosomal alleles. analysis of the gene frequency of the est ii region showed that one ... | 1977 | 869895 |
| genetic polymorphism and evolution in parthenogenetic animals. vi. diploid and triploid polydrosus mollis (coleoptera: curculionidae). | | 1976 | 947875 |
| hydrocarbons from males, females, and larvae of pecan weevil: curculio caryae (horn). | as part of a program to identify as many as possible of the components of the pecan weevil, curculio caryae (horn), the hydrocarbons from males, females, and larvae were isolated by solvent extraction and column chromatography and subjected to gas lipuid chromatography-mass spectrometry analysis. n-alkanes from c14-c32 in the larvae and unsaturated and branched chain hydrocarbons from c20-c32 in males and females were found. there are no significant differences between the hydrocarbons of the ma ... | 1975 | 1117804 |
| genetic polymorphism and evolution in parthenogenetic animals. iii. tetraploid otiorrhynchus scaber (coleoptera: curculionidae). | | 1976 | 1262242 |
| ige-mediated inhalant allergy in inhabitants of a building infested by the rice weevil (sitophilus oryzae). | the rice weevil (sitophilus oryzae) is known as a stored product pest. occupants living in a factory used previously as a granary and known to be contaminated by the rice weevil developed rhinitis and asthma. to study the role of the potential insect allergens, extracts were prepared from whole body and a grain dust of the rice and grain weevil (sitophilus granarius). the extracts were coupled to cyanogen bromide-activated paper disks. skin prick tests (spt) were performed using common inhalant ... | 1992 | 1471781 |
| storage proteins of the larval root weevil diaprepes abbreviatus (coleoptera: curculionidae): riboflavin binding and subunit isolation. | proteins present at high concentrations in hemolymph of the larval weevil diaprepes abbreviatus were previously shown to bind a synthetic coumarin, 7-amino-3-phenyl coumarin (coumarin-10). one of the two native proteins previously identified (protein i) is now shown to separate into two distinct bands (proteins ia and ib) using native gradient pore-limiting electrophoresis. the high concentration of proteins ia, ib, and ii in larval hemolymph, their disappearance from hemolymph upon pupation, an ... | 1992 | 1504322 |
| mitochondrial dna in the bark weevils: size, structure and heteroplasmy. | mitochondrial dna of higher animals has been described as an example of extreme efficiency in genome structure and function. where exceptionally large size molecules have been found (greater than 20 kb), most have occurred as rare variants within a species, suggesting that these variants arise infrequently and do not persist for long periods in evolutionary time. in contrast, all individuals of at least three species of bark weevil (curculionidae: pissodes) possess a mitochondrial genome of unus ... | 1989 | 2612897 |
| mycetocyte symbiosis in insects. | 1. non-pathogenic microorganisms, known as mycetocyte symbionts, are located in specialized 'mycetocyte' cells of many insects that feed on nutritionally unbalanced or poor diets. the insects include cockroaches, cimicidae and lygaeidae (heteroptera), the homoptera, anoplura, the diptera pupiparia, some formicine ants and many beetles. 2. most mycetocyte symbionts are prokaryotes and a great diversity of forms has been described. none has been cultured in vitro and their taxonomic position is ob ... | 1989 | 2696562 |
| heavy metal bioaccumulation and effects on waterhyacinth weevils, neochetina eichhorniae, feeding on waterhyacinth, eichhornia crassipes. | | 1986 | 3742077 |
| the effect of staphylococcal enterotoxin b on pheromone production in fat bodies isolated from male boll weevils. | | 1986 | 3950434 |
| sterility induced in boll weevils by alkylating agents administered in an adult diet. | | 1972 | 4257783 |
| volatile constituents of male and female boll weevils and their frass. | | 1974 | 4424677 |
| free amino acid levels in the boll weevil (coleoptera: curculionidae): the effect of five different diets. | | 1974 | 4434735 |
| low chromosome number and post-reductional xo in gelus californicus (lec.) (coleoptera: curculionidae). | | 1972 | 4653579 |
| frego bract cotton and normal bract cotton: how morphology affects control of boll weevils by insecticides. | | 1973 | 4690273 |
| metabolism of carbon-14-labeled hempa by adult boll weevils. | | 1973 | 4774380 |
| attraction of female boll weevils to diapausing and reproducing males. | | 1974 | 4833472 |
| [adaptation of weevil larvae of the tribe sipalini (coleoptera, curculionidae) and related groups to life in wood]. | | 1974 | 4847995 |
| [isolation of candida brumptii from the mycetocytes of the larva of hylobius abietis l. (curculionidae xylophage). study of its oxidases]. | | 1966 | 4958527 |
| phospholipid patterns of two symbiote-harbouring weevils, the rice weevil, sitophilus oryzae l., and the corn weevil, sitophilus zeamais (mots.) (coleoptera: curculionidae). | | 1972 | 5075766 |
| citrus oils as protectants of black-eyed peas against cowpea weevils: laboratory evaluation. | | 1972 | 5085809 |
| large-scale field tests of soil applications of aldicarb for suppression of populations of boll weevils. | | 1971 | 5122349 |
| effectiveness of carbofuran against strawberry root weevils in peppermint. | | 1971 | 5122364 |
| sexual competition of gamma-sterilized male cowpea weevils. | | 1971 | 5122367 |
| toxicity of parathion and several of its photoalteration products to boll weevils. | | 1971 | 5153762 |
| sterilization of boll weevils with combinations of chemosterilants and x-rays, gamma rays, thermal neutrons, or fast neutrons. | | 1969 | 5348617 |
| chromosomal polymorphism in pissodes weevils: further on incompatibility in p. terminalis. | | 1969 | 5370784 |
| the genus phrydiuchus, with the description of two new species (coleoptera: curculionidae). | | 1969 | 5374167 |
| lipid content and seasonal activity of odontopus calceatus (coleoptera: curculionidae) adults. | | 1969 | 5377047 |
| damage to testes and recovery of fertility in boll weevils fed chemosterilants. | | 1969 | 5391535 |
| cholinesterase in boll weevils, anthonomus grandis boheman. i. distribution and some properties of the crude enzyme. | | 1968 | 5653718 |
| [on the role of the time factor in the irradiation of insect imagoes (experiments on granary weevils)]. | | 1968 | 5676549 |
| the effects of chronic doses of an organophosphorus inhibitor on cholinesterase activity in boll weevils. | | 1965 | 5841254 |
| some effects of desiccation on locomotion of the grain beetle, sitophilus granarius (l.) (coleoptera: curculionidae). | | 1966 | 5919295 |
| locomotory behaviour of pyrethrum-resistant and susceptible strains of grain weevil, sitophilus granarius (l.) (coleoptera, curculionidae). | | 1966 | 5956582 |
| lipid biosynthesis in the boll weevil (anthonomus grandis boheman) (coleoptera: curculionidae): distribution of radioactivity in the principal lipid classes synthesized from c14-1-acetate. | | 1966 | 5969689 |
| bioelectric activity of the central nervous system in normal and diapausing alfalfa weevils. | | 1966 | 6003744 |
| lysozyme in eggs of the cotton boll weevil, anthonomus grandis boheman (coleoptera: curculionidae). | lysozyme exhibiting bacteriolytic activity was found in boll weevil eggs at a concentration of 2.22 ng of lysozyme per boll weevil egg. | 1980 | 7371758 |
| [determining of new karyotypes: value of a statistical method]. | for the authors, ectemnorrhininae (coleoptera, curculionidae) from southern indian ocean islands constitute the subject of systematic karyological studies, in order to get further information as to the phylogeny of this group of insects. a previous study had been carried out about 3 different species, ectemnorrhinus drygalskii, e. viridis and dusmoecetes richtersi, through direct observation of the only few mitotic metaphase plates, completely isolated from each other, which could be found in ad ... | 1995 | 7648358 |
| geographical origin of an introduced insect pest, listronotus bonariensis (kuschel), determined by rapd analysis. | the argentine stem weevil, listronotus bonariensis (kuschel) (coleoptera: curculionidae), is an important introduced pasture pest in new zealand. in this study geographical populations of this species were analysed using polymerase chain reaction-based randomly amplified polymorphic dna (rapd), in an attempt to determine the geographical origin of the pest. morphologically indistinguishable individuals were collected from nine south american, five new zealand and one australian populations. ten ... | 1994 | 8200816 |
| agrochemical activity and isolation of n-(4'-bromophenyl)-2,2-diphenylacetanilide from the thai plant arundo donax. | the chcl3 extract of the whole plant of arundo donax yielded n-(4'-bromophenyl)-2,2-diphenylacetanilide [1]. the structure was determined on the basis of chemical, spectroscopic, and x-ray crystallographic data. compound 1 has not been previously reported as a natural product and showed inhibition of feeding for boll weevils. | 1993 | 8254352 |
| amplification and sequencing of dna from a 120-135-million-year-old weevil. | dna has been successfully isolated from both fossilized plant and animal tissues. the oldest material, dated as 25-40 million years old (tertiary), was obtained from amber-entombed bees and termites. tissues from both these insects yielded dna of good quality, which could be amplified by the polymerase chain reaction (pcr) and subsequently sequenced, including the genes encoding 18s ribosomal rna and 16s rrna. we report here the extraction of dna from a 120-135-million-year-old weevil (nemonychi ... | 1993 | 8505978 |
| effects of maize weevils (coleoptera: curculionidae) on production of aflatoxin b1 by aspergillus flavus in stored corn. | insects play an important role as facilitators of the aflatoxin-producing fungus, aspergillus flavus link, in both preharvest and postharvest corn. the current study investigated the role of maize weevils, sitophilus zeamais motschulsky, in enhancing aflatoxin b1 content in stored corn. in laboratory experiments, aflatoxin b1 was quantified with an indirect enzyme-linked immunosorbent assay (elisa) on corn following artificial infestation with adult weevils that had each been topically treated w ... | 1995 | 8537546 |
| chemical identification, electrophysiological and behavioral activities of the pheromone of metamasius hemipterus (coleoptera: curculionidae). | five hydroxylated aliphatic molecules were identified as the pheromone produced by male west indian sugarcane borer (wisb): 4-methyl-5-nonanol (1), 2-methyl-4-heptanol (2), 2-methyl-4-octanol (3), 5-nonanol (4) and 3-hydroxy-4-methyl-5-nonanone (5). electroantennographic recordings revealed antennal responses to compounds 1, 2, 3 and 4. significant eags were also recorded in response to pheromone compounds of weevils belonging to the same subfamily and structurally related to the wisb pheromone. ... | 1996 | 8733610 |
| alfalfa weevil (coleoptera:curculionidae) management in alfalfa by spring grazing with cattle. | the effect of continuous, intensive grazing by cattle in the 1st alfalfa growth cycle on larval densities of the alfalfa weevil, hyera postica (gyllenhal), was evaluated in "alfagraze' and "apollo' alfalfa, which are tolerant and not tolerant to grazing, respectively. in small-cage exclusion trials, grazing reduced larval numbers in 1991 by 65% in alfagraze and by 32% in apollo. larval numbers in 1992 were low (< or = 0.6 larvae per stem) and were not reduced significantly by grazing. grazing an ... | 1996 | 8986125 |
| histopathological investigations on rickettsiella-like sp. and nonoccluded viruses infecting the pecan weevil curculio caryae, the squash beetle epilachna borealis, and the mexican bean beetle epilachna varivestis | electron microscopic observations of abnormal specimens of pecan weevils, curculio caryae, squash beetles, epilachna borealis, and mexican bean beetles, epilachna varivestis, obtained from insect-rearing facilities and from field collections revealed that rickettsia-like organisms (rlos) and viruses caused disease in these species. several pleomorphic forms of the rlos which were similar to those of rickettsiella sp. were found in tissues of the fat body, hypodermis, tracheal matrix, muscle, and ... | 1997 | 9056462 |
| molecular cloning of bruchid (zabrotes subfasciatus) alpha-amylase cdna and interactions of the expressed enzyme with bean amylase inhibitors. | alpha-amylases are important digestive enzymes in weevils that infest starchy seeds, and plants have evolved proteinaceous alpha-amylase inhibitors (alpha ai) for protection. to gain a better understanding of the interaction between weevil alpha-amylases and alpha ais, we cloned the alpha-amylase cdna of zabrotes subfasciatus larvae. larvae of this bruchid infest seeds of cultivated varieties of the common bean, phaseolus vulgaris, although the seeds contain high levels of an alpha ai. the alpha ... | 1997 | 9134709 |
| genetic characterization of populations of a de novo arisen sugar beet pest, aubeonymus mariaefranciscae (coleoptera, curculionidae), by rapd analysis. | the weevil aubeonymus mariaefranciscae is an important pest of sugar beet crops in southern spain that was first described as a new species in 1979. we have studied the genetic variability of this insect by rapd analysis of 122 individuals using eight primers. the high resolution provided by random amplified polymorphic dna (rapds), in combination with efficient genetic distance estimators, allowed a very detailed description of the ecology and evolution of the populations of this insect in the ... | 1997 | 9211731 |
| the influence of habitat and altitude on oxygen uptake in sub-antarctic weevils. | whole-organism oxygen uptake rate and its temperature sensitivity (determined using regression analyses and estimates of q10) were examined in six closely related weevil species (palirhoeus eatoni, bothrometopus randi, bothrometopus elongatus, bothrometopus parvulus, ectemnorhinus similis, and ectemnorhinus marioni) from sub-antarctic marion island over a short time period and using the same methods. bothrometopus elongatus, b. parvulus, and the two ectemnorhinus species have populations at both ... | 1997 | 9231383 |
| mitochondrial dna sequence divergence in weevils of the pissodes strobi species complex (coleoptera:curculionidae). | mitochondrial dna sequence divergence is unusually high between several species of the pissodes strobi complex, in contrast to low allozyme and morphological divergences, and the ability to hybridize in the laboratory. we sequenced an 810 bp segment in seven individuals, representing four species in the p. strobi complex and one outgroup species, p. affinis randall. the 810 bp segment covered the 3' half of the cytochrome oxidase subunit i (coi) gene. we also sequenced one specimen of p. strobi ... | 1997 | 9272443 |
| molecular characterization of a bean alpha-amylase inhibitor that inhibits the alpha-amylase of the mexican bean weevil zabrotes subfasciatus. | cultivated varieties of the common bean (phaseolus vulgaris l.) contain an alpha-amylase inhibitor (alpha ai-1) that inhibits porcine pancreatic alpha-amylase (ppa; ec 3.2.1.1) and the amylases of certain seed weevils, but not that of the mexican bean weevil, zabrotes subfasciatus. a variant of alpha ai-1, called alpha ai-2, is found in certain arcelin-containing wild accessions of the common bean. the variant alpha ai-2 inhibits z. subfasciatus alpha-amylase (zsa), but not ppa. we purified alph ... | 1997 | 9431678 |
| lack of nucleotide variability in a beetle pest with extreme inbreeding. | the coffee berry borer beetle hypothenemus hampei (ferrari) (curculionidae: scolytinae) is the major insect pest of coffee and has spread to most of the coffee-growing countries of the world. this beetle also displays an unusual life cycle, with regular sibling mating. this regular inbreeding and the population bottlenecks occurring on colonization of new regions should lead to low levels of genetic diversity. we were therefore interested in determining the level of nucleotide variation in nucle ... | 1998 | 9535165 |
| the laboratory preference of annual legumes by pea weevil sitona lineatus l. (col., curculionidae) and their effect on susceptibility of weevils to entomogenous nematodes. | the activity and natural mortality of sitona lineatus weevils during the egg laying period may be connected with host plant preference. preference of s. lineatus adults for early field pea and other pea cultivars influences their low feeding activity and results in lopff average body weight and higher susceptibility to entomogenous nematodes, steinernema carpocapsae, s. feltiae, and heterorhabditis bacteriophora. | 1998 | 9538029 |
| conidial attachment of metarhizium anisopliae and beauveria bassiana to the larval cuticle of diaprepes abbreviatus (coleoptera: curculionidae) treated with imidacloprid | a series of experiments was conducted to determine the effect of imidacloprid on the number of metarhizium anisopliae and beauveria bassiana conidia found on the cuticle of first instar diaprepes abbreviatus following different treatments. larvae treated with m. anisopliae conidia and imidacloprid by dipping removed significantly fewer conidia from their cuticle when in contact with soil or a food source compared with fungal-treated larvae alone. in addition, more m. anisopliae and b. bassiana c ... | 1998 | 9784344 |
| biological control of water hyacinth under conditions of maintenance management: can herbicides and insects be integrated? | / we hypothesized that repeated herbicidal (maintenance) control of water hyacinth infestations in florida suppressed biological control agent populations, especially the weevils neochetina eichhorniae and n. bruchi. we therefore sampled water hyacinth and weevil populations at 54 sites distributed statewide. half were under maintenance control, half were not treated with herbicides. general site conditions were assessed, demographic data were collected on weevil and plant populations, the repro ... | 1999 | 9852190 |
| a synergistic aggregation pheromone component in the banana weevil cosmopolites sordidus germar 1824 (coleoptera: curculionidae). | cosmopolites sordidus is an important pest on banana plantations worldwide. the chemistry of the aggregation pheromone of this insect has been recently resolved and here we present the first evidence from field trails that sordidin, a compound from the male released aggregation pheromone, attracts significant number of weevils only if host plant odors are also present. sordidin attracts few insects when it is presented without the host plant tissue. however, the attractiveness of host plant tiss ... | 1998 | 10030046 |
| virus-like particles in the ovaries of microctonus aethiopoides loan (hymenoptera: braconidae), a parasitoid of adult weevils (coleoptera: curculionidae) | the morphology of the female reproductive system of microctonus aethiopoides is described and illustrated, and an ultrastructural examination of the ovaries was carried out. virus-like particles (vlps) were initially found in the ovarial epithelial cells of females from pre-adult emergence from the pupal cocoon until at least 5 days after emergence. the particles assembled in the nucleus of the epithelial cells, apparently being synthesized de novo in association with a putative virogenic stroma ... | 1999 | 10066398 |
| thermal treatments to increase acoustic detectability of sitophilus oryzae (coleoptera: curculionidae) in stored grain. | hidden infestations of stored-product insect larvae are detected most rapidly by acoustic techniques when the larvae are highly active. larval activity is periodic, however, and it tends to decrease after the larvae are disturbed or cooled. because of the practical need for rapid inspection of grain at commercial elevators, several heat treatments were tested as potential methods of increasing larval activity and improving the speed and reliability of acoustic detection under adverse conditions. ... | 1999 | 10333753 |
| four intracellular genomes direct weevil biology: nuclear, mitochondrial, principal endosymbiont, and wolbachia. | cell physiology in the weevil sitophilus oryzae is coordinated by three integrated genomes: nuclear, mitochondrial, and the "s. oryzae principal endosymbiont" (sope). sope, a cytoplasmic bacterium (2 x 10(3) bacteria per specialized bacteriocyte cell and 3 x 10(6) bacteria per weevil) that belongs to the proteobacteria gamma3-subgroup, is present in all weevils studied. we discovered a fourth prokaryotic genome in somatic and germ tissues of 57% of weevil strains of three species, s. oryzae, sit ... | 1999 | 10359795 |
| insect pheromones--an overview of biosynthesis and endocrine regulation. | this overview describes, compares, and attempts to unify major themes related to the biosynthetic pathways and endocrine regulation of insect pheromone production. rather than developing and dedicating an entirely unique set of enzymes for pheromone biosynthesis, insects appear to have evolved to add one or a few tissue-specific auxiliary or modified enzymes that transform the products of "normal" metabolism to pheromone compounds of high stereochemical and quantitative specificity. this general ... | 1999 | 10406089 |
| entomopathogenic nematodes to control black vine weevil (coleoptera: curculionidae) on strawberry. | we investigated the potential of heterorhabditid nematodes to control larvae of the black vine weevil, otiorhynchus sulcatus (f.), in 2 field experiments in commercial strawberry plantings. in both experiments, nematodes were applied directly onto the straw mulch, or onto the soil after temporary removal of the mulch. heterorhabditis marelatus lui & berry (rhabditida: heterorhabditidae) reduced numbers of weevil larvae and the percentage of plants infested in both experiments, irrespective of st ... | 1999 | 10407621 |
| identification of sources of plant resistance to diaprepes abbreviatus (coleoptera: curculionidae) by three bioassays. | host plant resistance to the root weevil diaprepes abbreviatus (l.) was assessed for 3 citrus rootstock cultivars, 5 promising hybrid rootstocks, and 3 citroid fruit trees using 3 bioassay methods: a pot bioassay with 1-yr seedlings; a new, 21-cm plastic cell bioassay with 5-mo seedlings; and a diet incorporation bioassay. the plastic cell bioassay is a more rapid screening method and is capable of evaluating a larger number of entries in a shorter period compared with current methods. the 3 bio ... | 1999 | 10504899 |
| ttagg telomeric repeats in chromosomes of some insects and other arthropods. | we studied the occurrence of the ttagg telomere repeats by fluorescence in-situ hybridization (fish) and southern hybridization in ten insect species and two other arthropods. (ttagg)n-containing telomeres were found in three lepidoptera species, the silkworm bombyx mori (in which the telomeric sequence was recently discovered), the flour moth ephestia kuehniella, and the wax moth galleria mellonella, in one species of hymenoptera, the honey bee apis mellifera, in one species of coleoptera, the ... | 1999 | 10560968 |
| development-inhibiting activity of some tropical plants against sitophilus zeamais motschulsky (coleoptera: curculionidae). | thirteen tropical plants were evaluated for development-inhibiting activity against sitophilus zeamais. the bioassays were carried out by incorporating seeds or leaves at various dose levels into an artificial diet for the test insect. it was found that seeds of basella alba and leaves of operculina turpethum and calotropis gigantea were potent in delaying development and in reducing adult emergence, and hence the capacity for population increase. at 0.5% concentration, adult emergence in tests ... | 2000 | 10758266 |
| bean alpha-amylase inhibitor 1 in transgenic peas (pisum sativum) provides complete protection from pea weevil (bruchus pisorum) under field conditions. | two alpha-amylase inhibitors, called alphaai-1 and alphaai-2, that share 78% amino acid sequence identity and have a differential specificity toward mammalian and insect alpha-amylases are present in different accessions of the common bean (phaseolus vulgaris). using greenhouse-grown transgenic peas (pisum sativum), we have shown previously that expression of alphaai-1 in pea seeds can provide complete protection against the pea weevil (bruchus pisorum). here, we report that alphaai-1 also prote ... | 2000 | 10759552 |
| lethal and sublethal effects of selected insecticides and an insect growth regulator on the boll weevil (coleoptera: curculionidae) ectoparasitoid catolaccus grandis (hymenoptera: pteromalidae). | a laboratory culture of catolaccus grandis (burks), an ectoparasitoid of the boll weevil, anthonomus grandis grandis boheman, was exposed to lethal and sublethal doses of insecticides and an insect growth regulator using a spray chamber bioassay. materials tested were azinphos-methyl, endosulfan, fipronil, malathion, cyfluthrin, dimethoate, spinosad, methyl parathion, acephate, oxamyl, and tebufenozide. at full rates, spinosad was significantly less toxic to female c. grandis than other treatmen ... | 2000 | 10826176 |
| larval growth of diaprepes abbreviatus (coleoptera: curculionidae) and resulting root injury to three citrus varieties in two soil types. | larval growth and intraspecific competition of diaprepes abbreviatus (l.) larvae and consequent root injury in container-grown citrus in the greenhouse were evaluated. roots of carrizo citrange, citrus sinesis l. osbeck x poncirus trifoliata (l.) raf.; cleopatra mandarin, c. reticulata blanco, and swingle citrumelo, c. paradisi macf. x p. trifoliata (l.) raf. rootstock seedlings grown in candler fine sand and potting soil were colonized with different populations of d. abbreviatus larvae. larvae ... | 2000 | 10826189 |
| bioactivities of methyl allyl disulfide and diallyl trisulfide from essential oil of garlic to two species of stored-product pests, sitophilus zeamais (coleoptera: curculionidae) and tribolium castaneum (coleoptera: tenebrionidae). | two of the major constituents of the essential oil of garlic, allium sativum l., methyl allyl disulfide and diallyl trisulfide, were tested against sitophilus zeamais motschulsky and tribolium castaneum (herbst) for contact toxicity, fumigant toxicity, and antifeedant activity. the contact and fumigant toxicities of diallyl trisulfide were greater than that of methyl allyl disulfide to the adults of these two species of insects. these two compounds were also more toxic to t. castaneum adults tha ... | 2000 | 10826211 |
| field monitoring sitophilus zeamais and sitophilus oryzae (coleoptera: curculionidae) using refuge and flight traps baited with synthetic pheromone and cracked wheat. | flight traps with open vertical baffles and refuge traps in the form of rectangular cardboard boxes were used to catch sitophilus zeamais and s. oryzae in kenya. traps baited with the aggregation pheromone (sitophilure), and for the first time traps baited with pheromone and food bait (cracked wheat), were field tested. both traps types were effective in capturing sitophilus spp and gave higher weevil catch when baited with pheromone and cracked wheat combined than with pheromone or cracked whea ... | 2000 | 10880812 |
| effect of various essential oils on callosobruchus maculatus (f.) (coleoptera: bruchidae). | essential oils were extracted from four west african plant species [tagetes minuta (family compositae), hyptis suaveolens (family labiatae), white basil ocimum canum (family labiatae), and sweet basil o. basilicum (family labiatae)] by steam distillation. the oil of the pepper piper guineense (family piperaceae), was extracted from the fruits by hydro distillation and ethanol extraction. mixed essential oil and total ethanol extract was used. kaolin powder (clay) was mixed (aromatized) with thes ... | 2000 | 10880813 |
| grape cane gallmaker (coleoptera: curculionidae) and its impact on cultivated grapes. | the grape cane gallmaker, ampeloglypter sesostris (leconte), is a native weevil that infests new shoots of wild and cultivated grapes (vitis spp.). females oviposit on the tender portions of new shoots, producing a reddish gall that can expand the shoot to twice its normal diameter. these galls can be quite numerous in eastern vineyards, and their effects are unknown. we studied the spatial distribution of grape cane gallmaker and its impact on berry size, sugar content, and nutrient and mineral ... | 2000 | 10902332 |
| colonization and diversification of the species brachyderes rugatus (coleoptera) on the canary islands: evidence from mitochondrial dna coii gene sequences. | the genus brachyderes schönherr (coleoptera: curculionidae) is represented by the species b. rugatus wollaston on the canary islands, with one subspecies on each of the islands of gran canaria, tenerife, la palma, and el hierro. these four subspecies are associated with the endemic pine tree pinus canariensis, and their distributions are broadly coincident. eighty-eight individual canarian brachyderes, sampled from across the distributions of each subspecies, have been sequenced for 570 bp of th ... | 2000 | 10937264 |
| role of ground trash volatiles in the selection of hibernation sites by boll weevils. | volatiles play a large role in governing the behavior of boll weevils (anthonomus grandis boheman). they are attracted to cotton plants, and the female is sexually attracted to the male. the attracting compounds in both instances are terpenoids. primarily in the fall of the year, boll weevils seek hibernation sites in leaf trash, where they remain until the following spring or summer. in the present study, essential oils were prepared by steam distillation from several leaf samples known to be p ... | 2000 | 10956168 |
| entomological fauna from reserva biológica do atol das rocas, rn, brazil: i. morphospecies composition. | atol das rocas, the unique atoll in the south-western atlantic, is located 144 nautical miles (266 km) northeast from the city of natal, ne brazil and 80 nautical miles from arquipélago de fernando de noronha, with geographic co-ordinates 3 masculine51's and 33 masculine49"w. it's of volcanic origin and coralline formation. the reef is ellipsoid, its largest axis (e-w) is approximately 3.7 km long, and the shortest (n-s) is 2.5 km. inside the lagoon, there are two islands: the ilha do farol and ... | 2000 | 10959113 |
| are flightless galapaganus weevils older than the galápagos islands they inhabit? | the 15 species in the weevil genus galapaganus lanteri 1992 (entiminae: curculionidae: coleoptera) are distributed on coastal perú and ecuador and include 10 flightless species endemic to the galápagos islands. these beetles thus provide a promising system through which to investigate the patterns and processes of evolution on darwin's archipelago. sequences of the mtdna locus encoding cytochrome oxidase subunit i (coi) were obtained from samples of seven species occurring in different ecologica ... | 2000 | 10971687 |
| virulence of entomopathogenic nematodes to diaprepes abbreviatus (coleoptera: curculionidae) in the laboratory. | the diaprepes root weevil, diaprepes abbreviatus (l.) is the most severe weevil pest in florida citrus. entomopathogenic nematodes have effectively suppressed larval populations of d. abbreviatus. our objective was to conduct a broad laboratory comparison of entomopathogenic nematodes for virulence toward larvae of d. abbreviatus. the study was conducted at three temperatures (20, 24, and 29 degrees c) and included nine entomopathogenic species and 17 strains: heterorhabditis bacteriophora poina ... | 2000 | 10985017 |
| effect of mango weevil (coleoptera: curculionidae) damage on mango seed viability in hawaii. | the mango weevil, cryptorhynchus (= sternochetus) mangiferae (f.), is a federally quarantined pest that prevents shipment of mangos from hawaii into the continental united states. although this monophagous weevil allegedly causes reduced seed germination, damage to the fruit pulp, and premature fruit drop in mangos, there are few studies examining these potential sources of crop loss. we conducted studies to assess the effect of mango weevil infestation on seed viability while making observation ... | 2000 | 10985036 |
| grain injury models for prostephanus truncatus (coleoptera: bostrichidae) and sitophilus zeamais (coleoptera: curculionidae) in rural maize stores in west africa. | prostephanus truncatus (horn) and sitophilus zeamais motschulsky have been reported as the two most serious pests of stored maize in sub-saharan africa and smallholder farmers are in urgent need of guidelines for their proper management. in this article we investigate the injury rates attributable to these two species in terms of percentage weight loss and percentage grain damage, and we derive functional response models for the two species on maize. the models successfully described the progres ... | 2000 | 10985051 |
| advantageous attributes of larval whitefringed weevil, naupactus leucoloma (coleoptera: curculionidae) for bioassaying soil fumigants, and responses to pure and plant-derived isothiocyanates. | first instars of the soil-inhabiting whitefringed weevil, naupactus leucoloma (boheman), are a particularly good bioassay model for assessing volatile soil fumigants and biofumigants. eggs are readily obtained and can be stored for long periods with larvae hatched on demand and the first instar is non-feeding, surviving without food or shelter. longevity varies with temperature, but readily accommodates the period required to conduct bioassays without appreciable mortality of untreated controls. ... | 2000 | 11020793 |
| particle film deters oviposition by diaprepes abbreviatus (coleoptera: curculionidae). | a hydrophilic formulation of the inert silicate kaolin was tested in a screenhouse for its effect on the behavior of the root weevil diaprepes abbreviatus (l.), a pest of citrus and ornamental plants in florida and the caribbean. feeding by adults on treated foliage was reduced by 68-84% compared with adults fed untreated foliage. no insecticidal activity was detected after 14 d of exposure to kaolin-treated leaves. oviposition was completely suppressed on treated foliage. although females ovipo ... | 2000 | 11057718 |
| karyological notes on three weevil species from armenia (coleoptera, curculionidae, cleoninae). | karyological studies were carried out on three armenian weevil species from the subfamily cleoninae. the following chromosome numbers were found in individual species: 2n = 38, n male = 18 + xyp in menecleonus anxius (gyllenhal, 1824), 2n = 40, n male = 19 + xyp in conorhynchus nigrivittis (pallas, 1781) and 2n = 44, n male = 21 + xyp in lixus iridis olivier, 1807. the heterochromosomes of all the examined species form, in the first meiotic metaphase, a typical parachute bivalent. | 2000 | 11080914 |
| c-banding patterns in chromosomes and sperm of strophosoma capitatum (de geer, 1775) (coleoptera: curculionidae, brachyderinae). | an analysis was made of the c-banded karyotype of strophosoma capitatum (deg.). the results indicate that the chromosome number is 2n = 22 and n male = 10 + xyp. the examined karyotype shows a pericentromeric position of constitutive heterochromatin in all autosomes. the shorter arm of the x chromosome is heterochromatic while the y chromosome is wholly euchromatic. successive stages of spermatogenesis were analysed. | 2000 | 11080916 |
| suitability of two root-mining weevils for the biological control of scentless chamomile, tripleurospermum perforatum, with special regard to potential non-target effects. | the biology and host range of the two root-mining weevils diplapion confluens kirby and coryssomerus capucinus (beck), two potential agents for the biological control of scentless chamomile tripleurospermum perforatum (mérat) laínz, were studied in the field in southern germany and eastern austria, and in a common garden and under laboratory conditions in delémont, switzerland from 1993 to 1999. both weevils were univoltine, and females started to lay eggs in early spring. diplapion confluens ha ... | 2000 | 11107251 |
| a test of the reserve meristem hypothesis using verbascum thapsus (scrophulariaceae). | the reserve meristem hypothesis predicts that latent meristems may act as a bet-hedging strategy given high-cost, predictable herbivory. under this hypothesis, damage to a plant should elicit greater branching. this prediction was tested in verbascum thapsus with three experiments manipulating the intensity and type of damage to reproductive tissue. in the first experiment, seed set was prevented in the treatment group by stigma excision and lanolin application to 80% of the flowers of each plan ... | 2000 | 11118415 |
| development of teratocytes associated with microctonus aethiopoides loan (hymenoptera: braconidae) in natural and novel host species. | a laboratory study investigated development of teratocytes derived from the parasitoid microctonus aethiopoides loan in the natural host, sitona discoideus gyllenhal, and in three novel hosts, the introduced weed biological control agent rhinocyllus conicus (froehlich), and two new zealand native species nicaeana cervina broun and irenimus stolidus broun. weevils were exposed to parasitoids and then examined 6, 10 and 15 days post-parasitism for parasitoid stage and size, and teratocyte number a ... | 2001 | 11119771 |
| effect of some ghanaian plant components on control of two stored-product insect pests of cereals. | in an attempt to find natural and cheaper methods for the control of stored-product pests of cereals, some traditionally useful ghanaian plant materials were evaluated. hexane+isopropyl alcohol extract of leaves of ocimum viride proved most effective in the control of tribolium castaneum (coleoptera: tenebrionidae) and sitophilus oryzae (coleoptera: curculionidae), followed by that of chromolaena odorata. o. viride showed strong repellent activity and thus deterred the insects from feeding. it r ... | 2000 | 11124372 |
| effect of essential oils from leaves of ageratum conyzoides, lantana camara and chromolaena odorata on the mortality of sitophilus zeamais (coleoptera, curculionidae). | ageratum conyzoides, chromolaena odorata, and lantana camara, are common weed species in cameroon. essential oil extracts from their leaves were tested for efficacy on the morality of the maize grain weevil, sitophilus zeamais (coleoptera, curculionidae). concentrations of the essential oils relative to the maize grains of 0.013, 0.025, 0.05 and 0.1% (v/w) were used for a. conyzoides and 0.063, 0.125, 0.25 and 0.50% (v/w) for c. odorata and l. camara. twenty 7-day old adult weevils were fed on m ... | 2001 | 11124374 |
| evolutionary assembly of the conifer fauna: distinguishing ancient from recent associations in bark beetles. | several shifts from ancestral conifer feeding to angiosperm feeding have been implicated in the unparalleled diversification of beetle species. the single largest angiosperm-feeding beetle clade occurs in the weevils, and comprises the family curculionidae and relatives. most authorities confidently place the bark beetles (scolytidae) within this radiation of angiosperm feeders. however, some clues indicate that the association between conifers and some scolytids, particularly in the tribe tomic ... | 2000 | 11133024 |
| dispersal of the cotton boll weevil (coleoptera: curculionidae) in south america: evidence of rapd analysis. | rapd technique provides useful information on the geographic origin and dispersal of the boll weevil anthonomus grandis in south america. nine populations from argentina, brazil, paraguay, mexico and usa were analyzed. weevils were captured on native plants (misiones province, argentina) and on cotton cultures, except the sample from the united states (usda laboratory-reared colony). a sample of the 'peruvian square weevil', a. vestitus, from ecuador, was included in the analysis in order to com ... | 2000 | 11138940 |
| mass rearing the weevil hylobius transversovittatus (coleoptera: curculionidae), biological control agent of lythrum salicaria, on semiartificial diet. | lythrum salicaria l., purple loosestrife, an invasive eurasian perennial, is degrading wetlands across temperate north america. chemical, physical, and mechanical methods failed to provide long-term control. therefore, four host-specific insect species (two leaf feeders, a root feeder, and a flower feeder) were introduced as biological control agents. to increase the availability of adults of the root feeding weevil hylobius transversovittatus goeze for field releases, we developed a semiartific ... | 2000 | 11142294 |
| overseeding endophytic perennial ryegrass into stands of kentucky bluegrass to manage bluegrass billbug (coleoptera: curculionidae). | studies were conducted to determine the utility of overseeding endophyte enhanced varieties of perennial ryegrass, lolium perenne l., into existing stands of kentucky bluegrass, poa pratensis l., to manage bluegrass billbug, sphenophorus parvulus gyllenhal, larval populations and their damage. two commercial varieties of endophyte enhanced perennial ryegrass (repell ii and triple play) were overseeded at two different rates in the field. s. parvulus larval populations, their damage, and turfgras ... | 2000 | 11142296 |
| evaluation of sequential sampling plans for the larger grain borer (coleoptera: bostrichidae) and the maize weevil (coleoptera: curculionidae) and of visual grain assessment in west africa. | repeated sampling of rural maize stores in benin was conducted to evaluate published parameters of a sequential sampling plan for a negative binomial distribution to determine pest status for prostephanus truncatus (horn) and sitophilus zeamais motschulsky. a computer program was used to rerandomize the data and evaluate the effects, in terms of average sample number and error rates, of different sampling plan parameter values. with respect to p. truncatus, lower and upper thresholds of 0.2 and ... | 2000 | 11142318 |
| impacts of chipping on surrogates for the longhorned beetle anoplophora glabripennis (coleoptera: cerambycidae) in logs. | as part of the eradication program for recent introductions of the longhorned beetle anoplophora glabripennis (motschulsky) in the united states, wood from infested trees is chipped and incinerated. two tests were conducted to evaluate the efficiency of chipping wood from infested trees on the survival of the beetle. in the first test, plastic worms were used as surrogates for larvae of the beetle. plastic worms of different sizes were placed in holes drilled in logs of sugar maple, acer sacchar ... | 2000 | 11142319 |