Chemosensory proteins (CSPs) play important roles in chemosensation insects, but their exact physiological functions remain elusive. In order to investigate the of CSPs oriental armyworm Mythimna separata, present study we explored expression patterns and binding characteristics CSP, MsepCSP8. The distinctive MsepCSP8 were also validated by RNAi. results showed that shares high sequence similarity with other insect family members, including characteristic four-cysteine signature motif. mRNA...

Among the many topics of interest to ecologists studying associations between phytophagous insects and their host plants are influence natal plant on future oviposition decisions mechanisms generalist versus specialist selection behavior. In this study, we examined preferences, behavior larval development tomato/potato psyllid, Bactericera cockerelli. By rearing psyllids with two distinct geographically-linked haplotypes different plants, were able examine role potential local adaptation...

Two consecutive field trials using a blend of entomopathogens in combination with new chemistry insecticide were conducted to determine treatment effects on onion thrips (Thrips tabaci Lindeman) populations, crop damage, plant development, yield and impact natural enemies. Products tested an cropping system included the insect pathogenic fungus Beauveria bassiana (isolate WG-11), entomopathogenic nematode Heterorhabditis bacteriophora (strain VS) new-chemistry chemical spinetoram.In all...

Summary Parasitoid acceptance of host individuals that differ in suitability is dynamic, varying with physiological state and experience. Female parasitoids high egg loads low life expectancy (i.e. time limited) are more willing to accept hosts for progeny development than females limited). However, studies dynamic behaviour have only considered high‐ vs. low‐suitability within the same species. Here, we report first results on whether from different species vary also using two aphid...

Abstract Like many insects, mosquitoes, rely on endosymbionts to grow and develop. These can be acquired from the environment. We used next generation 454 pyrosequencing discern whole-body microbiome of mosquito species Culex quinquefasciatus in various larval stadia following exposure common pharmaceutical personal care products (PPCPs) found wastewater. PPCP treatments included environmentally-relevant concentrations; 1) a combination antibiotics, 2) mammalian hormones, 3) mixture...

Due to their nutritional value and function as soil nitrogen fixers, production of pulses has been increasing markedly in the United States, notably dryland areas Northern Plains Pacific Northwest States (NP&PNW). There are several insect-transmitted viruses that prevalent periodically injurious pulse crops NP&PNW elsewhere North America. Others currently minor concern, occurring over limited or sporadically. serious constraints for world not known America, but have potential be introduced...

The global threat of invasive alien species (IAS) being introduced into new habitats is concerning, particularly in agricultural crops as insect are continuing to expand their distribution through anthropogenic activities and climate changes. Pea aphids (Acyrthosiphon pisum Harris) an economic numerous legume they can reproduce parthenogenetically, damage directly, vector over 30 plant viruses the insect's continues spread. There no existing pea aphid-specific risk maps that identify habitat...

A robust integrated pest management (IPM) programme is needed to reduce the use of insecticides in controlling Helicoverpa armigera. Therefore, a 2 year field study was conducted evaluate alternative control measures (biochemical use) for H. armigera relative exclusively using chemical insecticides. The entomopathogenic fungus Beauveria bassiana, jasmonic acid and insecticide chlorantraniliprole were each applied twice during chickpea growing season.All three materials (either alone or...

Facultatively social bees allow for comparisons of and solitary behaviour under similar environmental conditions. When such are polymorphic within the same population it provides a special somewhat unusual opportunity to examine factors leading cooperative (social) behaviours where many parameters as environment not variable. Some species in genus Xylocopa offers opportunities. Studies these often point guarding resource limitation nesting. The large carpenter bee virginica L. (Hymenoptera:...

forage based on several factors such as body

Abstract Development of effective management practices for insect pests relies heavily on sampling methods to accurately detect and quantify emerging populations. Herein we describe a novel method extract count nymphs potato psyllid, Bactericera cockerelli (Šulc) (Hemiptera: Triozidae), from leaves in commercial fields potato, Solanum tuberosum L. (Solanaceae). The proposed (referred as the leaf washing method, LWM) consists of: (1) immersing samples infested cold water remove dust sand; (2)...

The ecological theory on host plant choice by herbivores suggests that mothers should choose plants will maximize their offspring's success. In annual plants, physiology (and therefore suitability) is sometimes influenced maturity and growth stage, which may influence female choice. Potato were grown under greenhouse conditions used in no-choice bioassays to determine the effect of variety oviposition number stylet sheaths (which approximate insertions) tomato/potato psyllids. No-choice...

Potato psyllid (Bactericera cockerelli) is an important pest of potato, tomato and pepper. Not only could a toxin secreted by nymphs results in serious phytotoxemia some host plants, but also over the past few years B. cockerelli was shown to transmit "Candidatus Liberibacter solanacearum", putative bacterial pathogen potato zebra chip (ZC) disease, tomato. ZC has caused devastating losses production western U.S., Mexico, elsewhere. New knowledge genetic diversity needed develop improved...

Abstract Aster leafhopper (Hemiptera: Cicadellidae: Macrosteles quadrilineatus Forbes) is a polyphagous insect species that migrates into the upper Midwest of United States and Western Canadian Prairies. Populations this are associated with transmission plant pathogen (Candidatus Phytoplasma asteris, 16SrI) to several annual crops perennial species. Previous studies suggest aster leafhoppers can sometimes prefer less suitable hosts for their development survival, yet it unclear if lower...

Potato psyllids (Bactericera cockerelli Sulc) are a pest on solanaceous crop plants, including bell peppers. vector Candidatus Liberibacter psyllaurous, but peppers (Capsicum annum L.) do not exhibit symptoms from infection. show variation in spatial patterns and host choice with cultivar plant species. Consequently, study of distribution sampling plan specific to is necessary for management this insect pest, as those developed other crops unlikely transfer among crops.Potato were evenly...

Plant pathogens can influence the behavior and performance of insect herbivores. Studies these associations typically focus on tripartite interactions between a plant host, pathogen, its vector. An unrelated herbivore or pathogen might such interactions. This study used model system consisting Tobacco mosaic virus (TMV), psyllid Bactericera cockerelli Sulc, tomatoes to investigate multipartite among nonvector, determine whether shifts in host physiology were behind potential Additionally,...