Gregory Ripault's research while affiliated with Etablissement Français du Sang Alsace and other places
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Publications (4)
Seed coating treatments of sunflower by the systemic insecticide imidacloprid was suspected of affecting honey bees and bumblebees. The hypothesis raised was whether imidacloprid could migrate into nectar and pollen, then modify flower attractiveness, homing behavior, and colony development. Our greenhouse and field experiments with Bombus terrestr...
A laboratory feeding test was conducted on queenless micro-colonies of three bumblebee workers (Bombus terrestris L) to study the effects of low doses of imidacloprid on pollen and syrup consumption, worker survival, brood size and larval development. Two doses were used: D1 = 10 µg AI kg−1 in syrup and 6 µg AI kg−1 in pollen; D2 was 2.5 times high...
Citations
... genome compared with other insect species such as flies and mosquitoes (Claudianos et al., 2006). While some review studies have compared the relative sensitivity of A. mellifera spp. to other bees (Arena and Sgolastra, 2014;Tasei et al., 2000) and insect species (Hardstone and Scott, 2010), quantitative comparisons of differences in sensitivity, especially using the same experimental approaches are lacking (but see (Scott-Dupree et al., 2009)). In addition, most of the 'standard' tests conducted to date tend to be of short duration (48-96 h, e.g. ...
... Although their high toxicity enables applying neonics at lower amounts relative to other classes of insecticides, there is a growing body of evidence for their lethal and sublethal effects on nontarget insects, including pollinators [31]. These include evidence for negative influences on fertility [32], foraging activity and learning performance [33,34]. This evidence for non-specific toxicity has led to regulatory bans on the use of three commonly used neonic formulations, clothianidin, imidacloprid (IMD) and thiamethoxam, in the European Union and Canada [24,25]. ...
... In addition, there is a strong discrepancy between the categories of non-Apis bees. The studies on the toxicity of pesticides against the bumble bees are fairly abundant [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50]. On the contrary, the toxicity studies are limited on stingless bees [51-57]. ...
