Effects of some pesticides on Bombus terrestris under laboratory conditions
Abstract
Pesticides have not only lethal effect on bees but they can also change
their navigational behaviors. The bumblebees exposed to pesticides may not find
their food and hive, and even their motor nervous system can acutely be
affected. In this study, effects of some pesticides (abamectin, acetamiprid,
deltamethrin, imidacloprid) on bumblebees were investigated. The bumblebee
colonies were obtained from Koppert Biological Systems, Inc., Turkey. Six doses
of each pesticide were tested on motor behaviors of some extremities of the
bumblebees and bumblebees were fed on only 50% sucrose as a control group to
compare with pesticide applications. Pesticides were applied to bees by feeding
and spraying methods. Then, the situations of motor mobility of legs, antennae
and proboscis extension of the bumblebees exposed to pesticides were scored.
According to the results of the study, the pesticides used in the experiment
had an impact on motor nervous system of the bumblebees, and the most effective
pesticide was imidacloprid, followed by deltamethrin, acetamiprid, and
abamectin, respectively. These results show that imidacloprid, all doses,
demage basic motor coordination fundamental to locomotion and foraging and kill
at label dose.
Keywords
Bumblebees,Pesticide,Imidacloprid,Proboscis extension reflex
Supporting Institution
Project Number
Thanks
References
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