In: Proceedings of the 20th annual meeting entomologists in The Netherlands, organized by the Section Experimental and Applied Entomology (SETE), Ede, The Netherlands, 18 December 2009. - Amsterdam, The Netherlands : Nederlandse Entomologische Vereniging (NEV) - ISBN 9789071912337 - p. 29 - 34.
Amsterdam, The Netherlands : Nederlandse Entomologische Vereniging (NEV) - ISBN 9789071912337 the 20th annual meeting entomologists, Ede, The Netherlands, 2009-12-18
PRI BIOINT Entomology & Virology
Contribution in proceedings
Imidacloprid is a commonly used systemic insecticide which can induce several sublethal effects. Previous research has not shown any increased mortality in bees that were fed with sublethal doses. However, there is very little research conducted with the focus on survival rate of honeybees in the field. The aim of this study is to assess the influence of imidacloprid on the survival rate of honeybees under field conditions. Honeybees from different colonies were administered a single dose of imidacloprid of 0, 0.07, 0.7, 7 or 70 ng per bee. From each concentration one group was kept in the laboratory to assess lethal effects and one group was returned to the hive to assess possible sublethal effects. The surviving bees were counted regularly during 4 weeks. Analysis has shown no difference in survival rate between treatments in the laboratory. There is a difference between the 70 ng treatment and the control group in the field (P
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