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2015 ; 5
(ä): 10989
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English Wikipedia
A neonicotinoid impairs olfactory learning in Asian honey bees (Apis cerana)
exposed as larvae or as adults
#MMPMID26086769
Tan K
; Chen W
; Dong S
; Liu X
; Wang Y
; Nieh JC
Sci Rep
2015[Jun]; 5
(ä): 10989
PMID26086769
show ga
Xenobiotics such as the neonicotinoid pesticide, imidacloprid, are used globally,
but their effects on native bee species are poorly understood. We studied the
effects of sublethal doses of imidacloprid on olfactory learning in the native
honey bee species, Apis cerana, an important pollinator of agricultural and
native plants throughout Asia. We provide the first evidence that imidacloprid
can impair learning in A. cerana workers exposed as adults or as larvae. Adults
that ingested a single imidacloprid dose as low as 0.1 ng/bee had significantly
reduced olfactory learning acquisition, which was 1.6-fold higher in control
bees. Longer-term learning (1-17 h after the last learning trial) was also
impaired. Bees exposed as larvae to a total dose of 0.24 ng/bee did not have
reduced survival to adulthood. However, these larval-treated bees had
significantly impaired olfactory learning when tested as adults: control bees
exhibited up to 4.8-fold better short-term learning acquisition, though
longer-term learning was not affected. Thus, sublethal cognitive deficits
elicited by neonicotinoids on a broad range of native bee species deserve further
study.