Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| on the history of cottons and cotton weevils. | 1913 | 17793208 | |
| sunflower seed weevils and their control. | 1946 | 20286294 | |
| the toxicities of three petroleum oils to the grain weevils. | 1947 | 18901084 | |
| cytological studies upon genus otiorrhynchus (curculionidae, coleoptera) in poland. | 1949 | 15397412 | |
| [certain considerations on two cases of dermatitis caused by chickpea weevils]. | 1951 | 14914658 | |
| [experimental infection of body lice and grain weevils with rickettsia conori (tick fever)]. | 1952 | 14943609 | |
| [cytology of parthenogenetic curculionidae in switzerland]. | 1954 | 14364724 | |
| [sterilizing action of x-rays on corn weevils]. | 1959 | 14424485 | |
| some media used in an attempt to isolate and culture the mycetomal microorganisms of sitophilus weevils. | 1961 | 14477536 | |
| [on species of eutinobothrus (col., curculionidae, cryptohynchinae)]. | 1963 | 14141130 | |
| mycetomal and other microorganisms in young and aging sitophilus (coleoptera: curculionidae). | 1964 | 14222664 | |
| daily rhythm in the susceptibility of an insect to a toxic agent. | adult boll weevils exhibited a daily rhythm in their susceptibility to standardized doses of the insecticide, methyl parathion. the mortality produced by the insecticide was intimately related to the time of day at which the toxicant was applied. the rhythm appeared to be photoperiodically entrained and, regardless of the length of day or "clock time-of-day of treatment," a period of greatest resistance always occurred at dawn and recurred at 6-hour intervals throughout the 24-hour cycle. the gr ... | 1964 | 17814497 |
| the effects of chronic doses of an organophosphorus inhibitor on cholinesterase activity in boll weevils. | 1965 | 5841254 | |
| flora and fauna on backs of large papuan moss-forest weevils. | large, living, flightless weevils feeding on leaves of woody plants high moss forest on various new guinea mountain ranges have plant growth on their backs. fungi and algae have been found on 11 species of gymnopholus, lichens on six species, and liverworts on one species. in other genera of weevils, on the same mountains, there are additional specific associations with fungi, algae, lichens, and liverworts. the fungi and lichens, at least, are inhabited by oribatid mites of a new family, which ... | 1965 | 17841980 |
| 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 | |
| [isolation of candida brumptii from the mycetocytes of the larva of hylobius abietis l. (curculionidae xylophage). study of its oxidases]. | 1966 | 4958527 | |
| 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 | |
| praecocilenchus rhaphidophorus n. gen., n. sp. (nematoda: aphelenchoidea) parasitizing rhynchophorus bilineatus (montrouzier) (coleoptera: curculionidae) in new britain. | praecocilenchus rhaphidophorus n. gen., n. sp. is described as a new endoparasitic aphelenchoid nematode parasitizing adults of the palm weevil, rhynchophorus bilineatus (montrouzier). p. rhaphidophorus is unusual in that juveniles develop to maturity within the female uterus and thin, needle-shaped crystals form in the intestines of mature parasitic females. hundreds of parasitic female nematodes were found in the body cavity of infected hosts. the role of this parasite as a biological control ... | 1969 | 19325682 |
| 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 | |
| sex pheromones produced by male boll weevil: isolation, identification, and synthesis. | the response of female boll weevils to males, anthonomus grandis boheman, in laboratory bioassays can be reproduced by exposure to a mixture of compounds i, ii, and either iii or iv, all isolated from male weevils and their fecal material. the same response was elicited by mixtures of tile synthesized coimpounds. compound i is (+)-cis-2-isopropenyl-l-methylcyclobtutaneethanol; ii, cis-3,3-dimethiyl->(1,beta)cyclohexaneethanol; iii, cis-3,3-dimethlyl->(1,alpha)-cyclohexaneacetaldehyde; and iv, tr ... | 1969 | 17758066 |
| dodder weevils in simultaneous association with parasitic plants and their hosts. | the weevil smicronyx quadrifer (broad sense) is restricted in host preference to the parasitic dodders (cuscuta species) durin its adult life, but its larvae consistently move from dodder stems into living stems of certain hosts of dodders, where they feed, grow to maturity, and undergo metamorphosis. such associations, involving three interacting organisms, are very unusual among phytogragous insects. | 1970 | 17838984 |
| 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 | |
| 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 | |
| sterility induced in boll weevils by alkylating agents administered in an adult diet. | 1972 | 4257783 | |
| 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 | |
| genetic polymorphism and evolution in parthenogenetic animals. i. polyploid curculionidae. | the genetic variability at enzyme loci in different triploid and tetraploid parthenogenetic weevil populations has been elucidated by starch gel electrophoresis. the overall genotype of individual weevils belonging to different populations has been determined for over 25 loci. the results are compared with those obtained for diploid bisexual races of either the same or closely related species. the variation within a parthenogenetic population differs from that in diploid, sexually reproducing po ... | 1973 | 17248626 |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| genetic polymorphism and evolution in parthenogenetic animals. vi. diploid and triploid polydrosus mollis (coleoptera: curculionidae). | 1976 | 947875 | |
| 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 |
| 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 |
| [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 |
| head capsule transmission of long-wavelength light in the curculionidae. | the head capsule of many weevils contains a region that transmits only far-red and near-infrared light. in the alfalfa weevil, hypera postica, this extraocular cutoff filter evidently works in conjunction with the compound eyes, enabling the insect to use visual cues in locating or recognizing its host plant. | 1977 | 17837083 |
| evidence of a chemotactic substance in the spermathecal gland of the female boll weevil (coleoptera: curculionidae). | 1978 | 564566 | |
| 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 |
| rhythms in pheromone production of the male boll weevil. | male boll weevils, anthonomus grandis, held in a light regimen of 16 hours of light and 8 hours of darkness released pheromone rhythmically during the 24 hours. the amount released during peaks was typically 20 times the amount released in valleys. the ratio of the two alcohol components of the pheromone also showed a daily rhythm. under continuous light, both the release of pheromone and the ratio of the two alcohol components were arrhythmic. in darkness, pheromone release was diminished more ... | 1978 | 17752372 |
| 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 |
| weevils invade usda basic research plan. | 1984 | 17819486 | |
| susceptibility of the carrot weevil (coleoptera: curculionidae) to steinernema feltiae, s. bibionis, and heterorhabditis heliothidis. | larvae, pupae, and adults of the carrot weevil (listronotus oregonensis) were infected and killed by the three entomophagous nematodes (steinernema feltiae, s. bibionis, and heterorhabditis heliothidis) under controlled conditions. third-stage larvae were more susceptible than pupae or adults. s. feltiae and s. bibionis were the most aggressive nematode species, causing larval mortality after 24-48 hours in both continuous and 2-hour contact with nematode suspension. the nematodes multiplied suf ... | 1985 | 19294108 |
| 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 | |
| nemtaode-vector relationships in the pine wilt disease system. | pinewood nematode, bursaphelenchus xylophilus, is the causal agent of pine wilt disease in north america and japan. dispersal stage dauer larvae are transported to new host trees on the body surface and within the tracheal system of several beetle species. worldwide, 21 species of cerambycidae, 1 genus of buprestidae, and 2 species of curculionidae are known to carry pinewood nematode dauer larvae upon emerging from nematode-infested trees. five species of cerambycids in the genus monochamus are ... | 1988 | 19290206 |
| 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 |
| association of the red ring nematode and other nematode species with the palm weevil, rhynchophorus palmarum. | the palm weevil, rhynchophorus palmarum (l.), was collected in cocoons from red ring-diseased coconut palms (cocos nucifera l.) in trinidad and tobago. juveniles of five species of nematodes were extracted from the genitalia and macerated bodies of newly emerged adults of the palm weevil: rhadinaphelenchus cocophilus (cobb) goodey (the red ring nematode), teratorhabditis sp., diplogasteritus sp., mononchoides sp., and bursaphelenchus sp. over 90% of newly emerged weevil females and males were in ... | 1990 | 19287703 |
| teratorhabditis palmarum n. sp. (nemata: rhabditidae): an associate of rhynchophorus palmarum and r. cruentatus. | teratorhabditis palmarum n. sp., an associate of the palm weevils rhynchophorus palmarum and r. cruentatus is described. teratorhabditis palmarum was isolated from newly emerged adults and cocoons of r. palmarum from red-ring diseased coconut palms, cocos nucifera, in trinidad and ecuador, and from red-ring diseased oil palms, elaeis guineensis, in colombia. teratorhabditis palmarum was also associated internally with newly emerged adults of r. cruentatus from mature transplanted cabbage palmett ... | 1990 | 19287730 |
| 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 |
| biological control of the pecan weevil, curculio caryae (coleoptera: curculionidae), with entomopathogenic nematodes. | steinernema carpocapsae (weiser) strain a11, s. feltiae (filipjev) strain sn, and heterorhabditis bacteriophora poinar strains hp88 and georgia were tested for their efficacy as biological control agents of the pecan weevil, curculio caryae (horn), in pecan orchard soil-profile containers under greenhouse conditions. percentage c. caryae parasitism by s. carpocapsae and h. bacteriophora strain hp88 and georgia was consistently poor when applied either prior to or following c. caryae entry into t ... | 1993 | 19279746 |
| 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 |
| 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 |
| 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 |
| [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 |
| 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 |
| 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 |
| incongruence between morphological and mitochondrial-dna characters suggests hybrid origins of parthenogenetic weevil lineages (genus aramigus). | an expanded matrix of morphological characters for the genus aramigus (coleoptera: curculionidae), which includes numerous polyploid parthenogenetic lineages, was compared and combined with a published matrix of mitochondrial dna (mtdna) characters. the matrix of morphological characters provides little resolution of the a. tessellatus and a. uruguayensis species complexes but does resolve previously unresolved relationships among other morphologically defined species (a. globoculus + a. interme ... | 1998 | 12066688 |
| two strains of cabbage seed weevil (coleoptera: curculionidae) exhibit differential susceptibility to a transgenic oilseed rape expressing oryzacystatin i. | the aim of this study was to assess the potential effect of a transgenic line of oilseed rape expressing oryzacystatin i (oci) on two strains of cabbage seed weevil. the level of oci expression in seeds was approximately 0.05% of total soluble proteins. the insects were field-collected in two different locations, and their progeny was analyzed after a 3 week-development in pods. both strains showed a similar pattern of proteolytic activity, and similar levels of oci-sensitive proteinase activity ... | 1998 | 12769939 |
| formation of the karyosome in developing oocytes of weevils (coleoptera, curculionidae). | a complex structure termed the karyosome forms in the nuclei of the developing oocytes of anthonomus pomorum, hylobius abietis and phyllobius sp. (coleoptera: curculionidae). it is composed of highly condensed chromosomes, fused with an electron-dense granular material. there are two types of nuclear body associated with the karyosome. the smaller bodies are found in the immediate vicinity of the karyosome. the larger, and more electron-dense, bodies originate next to the condensing chromosomes. ... | 1999 | 18627875 |
| beetle pollination of shorea parvifolia (section mutica, dipterocarpaceae) in a general flowering period in sarawak, malaysia. | pollination ecology of an emergent tree species, shorea (section mutica) parvifolia (dipterocarpaceae), was studied using the canopy observation system in a lowland dipterocarp forest in sarawak, malaysia, during a general flowering period in 1996. although the species has been reported to be pollinated by thrips in peninsular malaysia, our observations of flower visitors and pollination experiments indicated that beetles (chrysomelidae and curculionidae, coleoptera) contributed to pollination o ... | 1999 | 21680346 |
| 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 |
| 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 |
| effects of culture method and formulation on the virulence of steinernema riobrave (rhabditida: steinernematidae) to diaprepes abbreviatus (coleoptera: curculionidae). | the diaprepes root weevil, diaprepes abbreviatus, is a pest of vegetables, ornamental plants, sugarcane, and citrus in florida and the caribbean. the entomopathogenic nematode, steinernema riobrave, can reduce larval populations of d. abbreviatus substantially. efficacy of entomopathogenic nematodes, however, may be affected by culture method and formulation. using d. abbreviatus as the host, we compared the efficacy of two commercial s. riobrave formulations, a liquid and a waterdispersible gra ... | 2000 | 19270978 |