Effects of an insect growth regulator and a solvent on honeybee (Apis mellifera L.) brood development and queen viability

Ecotoxicology
Kathrin MilchreitKaspar Bienefeld

Abstract

Honeybee toxicology is complex because effects on individual bees are modulated by social interactions between colony members. In the present study, we applied high doses of the insect growth regulator fenoxycarb to honeybee colonies to elucidate a possible interplay of individually- and colony-mediated effects regarding honey bee toxicology. Additionally, possible effects of the solvent dimethyl sulfoxide (DMSO) were assessed. We conducted studies on egg hatching and brood development to assess brood care by nurse bees as well as queen viability. Egg hatching was determined by the eclosion rate of larvae from eggs originating from colonies (i) treated with sugar syrup only, (ii) treated with sugar syrup containing DMSO and (iii) treated with sugar syrup containing fenoxycarb (dissolved in DMSO). To evaluate brood development, combs with freshly laid eggs were reciprocally transferred between colonies, and development of brood was examined in the recipient hive. Brood reared inside DMSO- and fenoxycarb-treated colonies as well as brood from DMSO- and from fenoxycarb-exposed queens showed higher mortality than brood not exposed to the chemicals. No differences were found in egg hatching among the treatments, but there was a high...Continue Reading

References

Mar 1, 1986·The Journal of Heredity·J R Harbo
Feb 1, 1971·Proceedings of the National Academy of Sciences of the United States of America·C FriendT Sato
Oct 24, 2001·Archives of Insect Biochemistry and Physiology·M LambinM Gauthier
Nov 26, 2011·Theriogenology·J Wegener, K Bienefeld
May 2, 2013·Journal of Insect Physiology·Jakob WegenerKaspar Bienefeld

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