this study was conducted to evaluate the age-specific functional response of psyllaephagus zdeneki noyes & fallahzadeh (hymenoptera: encyrtidae) at different nymph densities of olive psyllid, euphyllura pakistanica loginova (hemiptera: psyllidae). due to parasitoid behaviour of feeding and parasitizing the host, both traits were separately explored on a daily functional response. results of...

Plant viruses can profoundly alter the phenotypes of their host plants, with potentially far-reaching implications for ecology. Yet few studies have explored the indirect, host-mediated, effects of plant viruses on non-vector insects. We examined how infection of Cucurbita pepo plants by Cucumber mosaic virus (CMV) impacted the susceptibility of aphids (Myzus persicae) to attack by the parasito...

Parent-offspring conflict over clutch size may lead to siblicidal behavior between juveniles. In parasitoid wasps, selection for siblicide in small broods is predicted to produce a dearth of gregarious broods with few eggs. Here we document the clutch size distribution in the Bethylidae, a large family of aculeate parasitoids. Small gregarious clutches are the most common. Further data suggest ...

Parasitoid wasps are important natural enemies of arthropod hosts in natural and agricultural ecosystems and are often associated with viruses or virion-like particles. Here, we report a novel negative-stranded RNA virus from a parasitoid wasp (Pteromalus puparum). The complete viral genome is 12,230 nucleotides in length, containing five non-overlapping, linearly arranged open reading frames. ...

In this work, the wasp Brachymeria podagrica is recorded for first time Colombia, a solitary parasitoid of larvae Peckia collusor fly. Third instar P. were exposed to outdoor ambient conditions 6 hours in garden Tecnológico de Antioquia (Medellín, Colombia). 29 B. adults obtained from host pupae. Prevalence parasitism was 14.5 %.

we studied the pest and parasitoid fauna of cauliflower fields in southern tehran in 2011. in the course of our research the ichneumonid wasp barichneumon derogator (wesmael) of the subfamily ichneumoninae was collected and identified. this parasitoid attacks the larval stages of lepidopteran pests. the species b. derogator is newly recorded from iran.

Immature development of parasitoid wasps is restricted to resources found in a single host that is often similar in size to the adult parasitoid. When two or more parasitoids of the same or different species attack the same host, there is competition for monopolization of host resources. The success of intrinsic competition differs between parasitoids attacking growing hosts and parasitoids att...

The sensory ecology of predator detection by prey has been little studied for any arthropod prey predator system, in contrast to the sensory ecology of prey finding by predators. The aim of this study was to quantify the foraging signals produced by the parasitoid Sympiesis sericeicornis (Hymenoptera: Eulophidae) and the sensory ecology of enemy detection and the avoidance behaviour of the leaf...

This laboratory study investigated whether the larval-pupal parasitoid Oomyzus sokolowskii females adjust their brood size and sex ratio in response to body size and stage of Plutella xylostella larval hosts, as well as to their own body size and the order of oviposition. These factors were analyzed using multiple regression with simultaneous entry of them and their two-way interactions. Parasi...

the carob moth, ectomyelois ceratoniae zeller (lep.: pyralidae) is the most important pest of pomegranate orchards in iran. this current research was carried out to study the biology of venturia canescens gravenhorst (hym.: ichneumonidae) as one of its larval parasitoids. laboratory studies were conducted on the immature developmental time, adult longevity, functional response, parasite progeny...