English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

It is known that changes in prey density influence the biocontrol efficiency of beneficial predatory insects or parasitoids. This study asked the effect of different densities of whitefly (Traileuroides vaporariorum) on the search efficiency of the predator Delphastus pusillus through the determination of the functional response. Leaflets with eggs and second instars nymphs were obtained from bean plants infested with T. vaporariorum and placed in 5 cm diameter Petri dishes that contained moist filter paper. Thereafter, one individual predator, in larval or adult stage, was introduced in each dish, and left in contact for 24 hr with each prey density (8, 16, 32, 64 and 128 individuals). Results showed a type II response function of adults as well as larvae of D. pusillus predating whitefly nymphs. However, when eggs were supplied, there was not a clear tendency with prey density. Adult predators showed a high egg consumption rate (a’= 0.1480 consumed prey/density) with a handling time (Th) = 108 seconds, while larvae showed little preference for the egg stage.

ciencia y tecnología agropecuaria

Efecto de la densidad de población de Trialeurodes vaporariorum (Hemiptera: Aleyrodidae) sobre la eficiencia del depredador Delphastus pusillus (Coleoptera: Coccinellidae)