نتایج جستجو برای: parasitoids wasps
تعداد نتایج: 5938 فیلتر نتایج به سال:
Corridors that connect otherwise isolated habitats have often been proposed as a management strategy to mitigate negative effects of habitat fragmentation. Non-crop corridors may have the potential to enhance the connectivity for arthropod predators in cropland landscapes, especially for species that require multiple habitats, such as cavity-nesting wasps which use wooded habitat for nesting an...
Possibilities to combine augmentative biological control using Trichogramma spp. egg parasitoids and conservation through habitat manipulation, for the management of rice leaffolder stemborer pests have received only cursory mention in literature. We reviewed information on use releases manipulation manage leaffolders stemborers rice. Stemborers become a priority since 1990s with research focus...
insects are poikilothermes, hence environmentalfactors, and primarily temperature can affect their biological activities and behavior. in this study thermal range preferred by ooencyrtusfecundusferrier &voegelewas; investigated by a device producing a thermal gradient from 16 to47ºc. temperature of different parts of the arena was precisely recorded by eight thermometers entered the arena from ...
Abstract Drought events have the potential to mediate tri-trophic interactions. Changes in plant quality influence herbivore performance, which affects prey availability and for natural enemies. Parasitoid wasps are particularly vulnerable these changes since their development is inextricably linked that of prey. However, we know little about indirect effects water limitation on parasitoid espe...
Many insects possess a sexual communication system that is vulnerable to chemical espionage by parasitic wasps. We recently discovered that a hitch-hiking (H) egg parasitoid exploits the antiaphrodisiac pheromone benzyl cyanide (BC) of the Large Cabbage White butterfly Pieris brassicae. This pheromone is passed from male butterflies to females during mating to render them less attractive to con...
23 Ficus and their species–specific pollinator fig wasps represent an obligate plant-insect 24 mutualism, but figs also support a community of non-pollinating fig wasps (NPFWs) 25 that consist of gall makers and parasitoids/inquilines. We studied interactions between 26 Kradibia tentacularis, the pollinator of a dioecious fig tree species Ficus montana, and 27 an undescribed NPFW Sycoscapter sp...
We examined the native community of insects interacting with an invasive species, Tetropium fuscum (F.) (Coleoptera: Cerambycidae), in its new range to explore reasons for the invader's relatively slow spread. Tetropium fuscum is a European spruce borer established in Nova Scotia since at least 1990, but it has spread only about 125 km from its site of introduction. We compared the densities of...
During their larval development, endoparasitoids are known to dispose of host resources in several different ways. Some parasitoid wasps consume most or all tissues of the host, whereas others consume a small fraction of host resources and either ensure that the hostmoves away from the pupation site or allow the host to remain close to the parasitoid cocoon(s). Using a single host species, Myth...
While the ecological consequences of plant diversity have received much attention, the mechanisms by which intraspecific diversity affects associated communities remains understudied. We report on a field experiment documenting the effects of patch diversity in the plant Baccharis salicifolia (genotypic monocultures versus polycultures of four genotypes), ants (presence versus absence) and thei...
Inventory of the caterpillars, their food plants and parasitoids began in 1978 for today's Area de Conservacion Guanacaste (ACG), in northwestern Costa Rica. This complex mosaic of 120 000 ha of conserved and regenerating dry, cloud and rain forest over 0-2000 m elevation contains at least 10 000 species of non-leaf-mining caterpillars used by more than 5000 species of parasitoids. Several hund...
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