The use of biopesticides against agricultural pests is great importance for the sustainability pest management. goal present study was to determine lethal (acute) and sublethal (first male young queen emerge time, competition point, total number workers, males queens) effects four commercial [Nibortem (1.5% Lecanicillium (Verticillium) lecanii strain V1-1, Nostalgist Beauveria bassiana Bb-1), P...

Deformed wing virus (DWV), notorious for its virulence in the western honey bee (Apis mellifera) when vectored by ectoparasitic mite Varroa destructor, is also widespread among wild bumble species, presumably through spillover from bees. Experimental studies on of DWV Bombus spp. have provided equivocal results and until now been confined to bees under laboratory conditions. Here, we inoculated...

BACKGROUND This study was undertaken to identify the potential side effects of the novel naturalyte insecticide spinetoram in comparison with spinosad on the bumblebee Bombus terrestris L. The potential lethal effects together with the ecologically relevant sublethal effects on aspects of bumblebee reproduction and foraging behaviour were evaluated. Bumblebee workers were exposed via direct con...

In this study, effect of three entomopathogenic fungi (% 1.5 Beauveria bassiana strain Bb-1, % Lecanicillium lecani V1-1 and Paecilomyces fumosoreus PFs-1) on Bombus terrestris workers was investigated under controlled laboratory conditions. Workers were exposed to recommended doses by topical application dry film method. Of the 30 in each colony, 15 them marked blue red their thorax. While put...