Observations on midgut of Apis mellifera workers (Hymenoptera: Apoidea) under controlled acute exposures to a Bacillus thuringiensis-based biopesticide

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• 作者：Vera D’Urso ; Gaetana Mazzeo ; Valerio Vaccalluzzo ; Giorgio Sabella…
• 关键词：honeybees ; Bacillus thuringiensis var. aizawai/kurstaki ; bioassay ; mortality ; morphostructural changes
• 刊名：Apidologie
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：48
• 期：1
• 页码：51-62
• 全文大小：
• 刊物主题：Entomology; Life Sciences, general;
• 出版者：Springer Paris
• ISSN：1297-9678
• 卷排序：48

文摘

Morphostructural investigations have been carried out on Apis mellifera workers treated with single controlled acute exposures to a biopesticide containing Bacillus thuringiensis (Bt), to detect midgut changes until 96 h. Our findings show concentration-dependence of these changes, reflecting in different degrees on both mortality and behaviour. In particular, some midgut changes are also found 96 h after treatment. Our results show that the tested product does not affect survival at presumable environmental concentrations, so confirming the lesser toxicity of Bt-based biopesticides compared to other pesticides. However, in the light of the discovered long-term changes, we discuss the opportunity of taking into account possible chronic exposures to Bt-based products on A. mellifera.