Journal of Applied Entomology (2011) 135, 415-422

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M.A.P. Lima, C.S.S. Pires, R.N.C. Guedes, E.Y.T. Nakasu, M.S. Lara, E.M.G. Fontes, E.R. Sujii, S.C. Dias and L.A.O. Campos (2011)
Does Cry1Ac Bt-toxin impair development of worker larvae of Africanized honey bee?
Journal of Applied Entomology 135 (6), 415-422
Abstract: The western honey bee (Apis mellifera L.) is a widespread pollinator species. The present study aimed to test if Africanized honey bee larvae are negatively affected by the ingestion of diet contaminated with the Bacillus thunringiensis toxin Cry1Ac, which is expressed in GM cotton plants. The toxin activity was confirmed in bioassays with the velvetbean caterpillar (Anticarsia gemmatalis), a soybean pest species susceptible to Cry1Ac. The honey bee larvae were subjected to ingestion of either pure larval diet (control), diluted larval diet (diluted control) or larval diet diluted in a Cry1Ac solution at a concentration compatible with the maximum possible field exposure. Although diluted diet slightly increased larval mortality, Cry1Ac ingestion did not affect survival, developmental time, and neither adult body mass nor size, indicating that GM plants are unlikely to significantly impair the development of honey bee larvae. The larval-rearing system reported here was suitable to assess the lethal and sub-lethal effects of GM expressed toxins against honey bee larvae.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Raul Narciso C. Guedes

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
non-target effects/fate in environm.


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Anticarsia gemmatalis
Bacillus thuringiensis Cry1A-toxin (entomopathogen) Anticarsia gemmatalis