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《Journal of Bee》 2007-S1
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Foraging Behavior of Honeybee Affected by Imidacloprid

Yu-Chen Chuang En-Cheng Yang(1.Department of Entomology,Chung Hsing University,Taiwan Taichung 402;2.Department of Entomology,Taiwan University,Taiwan Taipei 106)  
Sub-lethal dosage of insecticide would not to determine the chronic neurotoxic effect on non-target insect.Previous studies have shown the honeybee behavior was affected by imidacloprid at low dosage level, especially effect the foraging behavior of forgers.In this study,the forgers were fed with different concentrations of imidacloprid and the time interval between two visits to the feeding site was recorded.Under the normal situation,the time interval was less than 300 s.However, the bees shown abnormal foraging behavior (300 s) when the concentration of imidacloprid was higher than 50μg/ L.At concentration of 600μg/L,34.4% of the tested bees were missing,and the number of missing bees would increase with the concentration.On the second day of the imidacloprid treatment,all the missing bees were back to the feeding site when the concentration were lower than 1 600μg/L,but some bees lose the recovery ability at concentration higher than 3 000μg/L.Abnormal foraging behavior was observed on those bees returned on the second day.These results suggest that honeybee colony may be weakened if the natural environment is contaminated by imidacloprid.
【CateGory Index】: S891
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