Search results for "Chrysodeixis"

showing 5 items of 5 documents

Toxicity and Binding Studies of Bacillus thuringiensis Cry1Ac, Cry1F, Cry1C, and Cry2A Proteins in the Soybean Pests Anticarsia gemmatalis and Chryso…

2017

ABSTRACT Anticarsia gemmatalis (velvetbean caterpillar) and Chrysodeixis includens (soybean looper, formerly named Pseudoplusia includens ) are two important defoliating insects of soybeans. Both lepidopteran pests are controlled mainly with synthetic insecticides. Alternative control strategies, such as biopesticides based on the Bacillus thuringiensis (Bt) toxins or transgenic plants expressing Bt toxins, can be used and are increasingly being adopted. Studies on the insect susceptibilities and modes of action of the different Bt toxins are crucial to determine management strategies to control the pests and to delay outbreaks of insect resistance. In the present study, the susceptibilitie…

0106 biological sciences0301 basic medicine030106 microbiologyBacillus thuringiensissoya pestMothsChrysodeixis01 natural sciencesApplied Microbiology and BiotechnologyMicrobiologyHemolysin Proteins03 medical and health sciencesBacterial ProteinsBacillus thuringiensisChrysodeixis includensBotanyheterologous competitionAnimalsPest Control BiologicalCry proteinssoybean looperPlant DiseasesBacillus thuringiensis ToxinsEcologybiologybusiness.industryfungiPest controlfood and beveragesbiology.organism_classificationEndotoxins010602 entomologyBiopesticideAnticarsia gemmatalisCry1AcPseudoplusiaLarvavelvetbean caterpillarSoybeansbusinessFood ScienceBiotechnologyApplied and Environmental Microbiology
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Specific binding of Bacillus thuringiensis Cry1Ea toxin, and Cry1Ac and Cry1Fa competition analyses in Anticarsia gemmatalis and Chrysodeixis include…

2019

AbstractAnticarsia gemmatalis (velvetbean caterpillar) and Chrysodeixis includens (soybean looper) are two important defoliation pests of soybeans. In the present study, we have investigated the susceptibility and brush border membrane-binding properties of both species to Bacillus thuringiensis Cry1Ea toxin. Bioassays performed in first-instar larvae demonstrated potent activity against both soybean pests in terms of mortality or practical mortality. Competition-binding studies carried out with 125Iodine-labelled Cry1Ea, demonstrated the presence of specific binding sites on the midgut brush border membrane vesicles (BBMV) of both insect species. Heterologous competition-binding experiment…

0106 biological sciences0301 basic medicineBrush borderlcsh:MedicineMoths01 natural sciencesArticleMicrobiologyApplied microbiology03 medical and health sciencesHemolysin ProteinsBacterial ProteinsChrysodeixis includensBacillus thuringiensisEnvironmental biotechnologyAnimalsCaterpillarlcsh:ScienceMultidisciplinaryBinding SitesbiologyBacillus thuringiensis ToxinsMicrovillifungilcsh:Rfood and beveragesMidgutbiology.organism_classificationEndotoxins010602 entomologyAnticarsia gemmatalis030104 developmental biologyCry1AcBiological Control AgentsLarvaBiological Assaylcsh:QPEST analysisSoybeansScientific Reports
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Differential performance of a specialist and two generalist herbivores and their parasitoids on Plantago lanceolata

2011

The ability to cope with plant defense chemicals differs between specialist and generalist species. In this study, we examined the effects of the concentration of the two main iridoid glycosides (IGs) in Plantago lanceolata, aucubin and catalpol, on the performance of a specialist and two generalist herbivores and their respective endoparasitoids. Development of the specialist herbivore Melitaea cinxia was unaffected by the total leaf IG concentration in its host plant. By contrast, the generalist herbivores Spodoptera exigua and Chrysodeixis chalcites showed delayed larval and pupal development on plant genotypes with high leaf IG concentrations, respectively. This result is in line with t…

0106 biological sciencesChrysodeixis chalcitesHyposoter didymatorIridoid GlucosidesSpodopteraGeneralist and specialist species010603 evolutionary biology01 natural sciencesMelitaea cinxiaBiochemistryArticlePheromonesParasitoidHost-Parasite InteractionsMultitrophic interactionsSpodoptera exiguaBotanyPlant defense against herbivoryCotesia marginiventrisAnimalsCotesia melitaearumPlantagoEcology Evolution Behavior and Systematics2. Zero hungerImmunocompromised hostHerbivorePlantagobiologyHost (biology)fungiIridoid glycosidesfood and beveragesGeneral MedicineFeeding Behaviorbiology.organism_classificationAdaptation PhysiologicalHymenopteraChrysodeixis chalcitesPlant Leaves010602 entomologyMelitaeaLarvaChemical defensePlants EdibleButterflies
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Insecticidal spectrum and mode of action of the Bacillus thuringiensis Vip3Ca insecticidal protein.

2016

The Vip3Ca protein, discovered in a screening of Spanish collections of Bacillus thuringiensis, was known to be toxic to Chrysodeixis chalcites, Mamestra brassicae and Trichoplusia ni. In the present study, its activity has been tested with additional insect species and we found that Cydia pomonella is moderately susceptible to this protein. Vip3Ca (of approximately 90 kDa) was processed to an approximately 70 kDa protein when incubated with midgut juice in all tested species. The kinetics of proteolysis correlated with the susceptibility of the insect species to Vip3Ca. The activation was faster to slower in the following order: M. brassicae (susceptible), Spodoptera littoralis (moderately…

0301 basic medicineInsecticides030106 microbiologyInsect pest controlAgrotis ipsilonVegetative insecticidal proteinsMothsmedicine.disease_causeMicrobiologyCiencias BiológicasInsecticide Resistance03 medical and health sciencesBiología Celular MicrobiologíaBacterial ProteinsBacillus thuringiensisBotanyTrichoplusiamedicineAnimalsSpodoptera littoralisPest Control BiologicalEcology Evolution Behavior and SystematicsHistological localizationbiologyToxinfungiVEGETATIVE INSECTICIDAL PROTEINSMidgutBioinsecticidesApical membranebiology.organism_classificationCROP PROTECTIONChrysodeixis chalcitesBIOINSECTICIDES030104 developmental biologyCrop protectionINSECT PEST CONTROLHISTOLOGICAL LOCALIZATIONCIENCIAS NATURALES Y EXACTASJournal of invertebrate pathology
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Optimum and Maximum Host Sizes at Parasitism for the Endoparasitoid <I>Hyposoter didymator</I> (Hymenoptera: Ichneumonidae) Differ Greatl…

2007

Host size is considered a reliable indicator of host quality and an important determinant of parasitoid fitness. Koinobiont parasitoids attack hosts that continue feeding and growing during parasitism. In contrast with hemolymph-feeding koinobionts, tissue-feeding koinobionts face not only a minimum host size for successful development but also a maximum host size, because consumption of the entire host is often necessary for successful egression. Here we study interactions between a generalist tissue-feeding larval endoparasitoid, Hyposoter didymator Thunberg (Hymenoptera: Ichneumonidae) and two of its natural hosts, Spodoptera exigua Hübner and Chrysodeixis chalcites Esper (Lepidoptera: N…

animal structuresEcologybiologyEcologyHost (biology)WaspsfungiParasitismHymenopteraMothsbiology.organism_classificationHost-Parasite InteractionsChrysodeixis chalcitesParasitoidIchneumonidaeLarvaInsect ScienceExiguaAnimalsBody SizeInstarEcology Evolution Behavior and SystematicsEnvironmental Entomology
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