A field study examining the effects of exposure to neonicotinoid seed-treated corn on commercial bumble bee colonies
A field study examining the effects of exposure to neonicotinoid seed-treated corn on commercial bumble bee colonies
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DOI：
10.1007/s10646-014-1340-5
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发表时间：
2014-11-01
期刊：
影响因子：
2.7
通讯作者：
Scott-Dupree, Cynthia D.
中科院分区：
文献类型：
--
作者：
Cutler, G. Christopher;Scott-Dupree, Cynthia D.
新烟碱类杀虫剂已被研究为北美和欧洲熊蜂减少的可能原因。这在玉米农业生态系统中具有潜在的意义，因为这种作物经常用类烟碱处理，并且在北美和欧洲的大部分农业景观中占主导地位，在那里熊蜂和其他授粉者是常见的。我们进行了一项实验，其中商业熊蜂（熊蜂凤仙花）蜂箱放置在花粉棚旁边的玉米（玉米）领域，从“传统”的种子，用类烟碱酸处理，或“有机”种子，没有用杀虫剂处理。从玉米植株中采集花粉样品进行类烟碱残留分析，确定返回蜂巢的工蜂携带的花粉类型，并在秋季解剖蜂巢以测量作为群体活力标记的各种终点。在所有常规田间采集的花粉中均检测到噻虫胺（0.1-0.8 ng/g），但在有机田间采集的花粉中未检测到噻虫胺。玉米花粉很少从大黄蜂采集，绝大多数花粉来自玉米地周围的野生植物。所有蜂箱看起来都很健康，类烟碱种子处理对测量的任何蜂箱终点都没有影响，除了工蜂的数量，其中与有机田（127 +/-A17工蜂/蜂箱）相比，从放置在常规田（96 +/-A15工蜂/蜂箱）旁边的蜂箱中回收的工蜂明显较少。结果表明，在花粉脱落期间暴露于从类烟碱处理的棚中生长的玉米对B的风险较低。凤仙花
Neonicotinoid insecticides have been studied as possible contributors to bumble bee declines in North America and Europe. This has potential significance in corn agro-ecosystems since this crop is frequently treated with neonicotinoids and dominates much of the agricultural landscape in North America and Europe where bumble bees and other pollinators are commonplace. We conducted an experiment where commercial bumble bee (Bombus impatiens) hives were placed during pollen shed next to corn (Zea mays) fields that were grown from "conventional" seed that was treated with neonicotinoids, or "organic" seed that was not treated with pesticides. Samples of pollen were collected from corn plants for neonicotinoid residue analysis, pollen types carried by worker bees returning to hives were determined, and in autumn hives were dissected to measure various endpoints that serve as markers of colony vigor. Clothianidin was detected (0.1-0.8 ng/g) in pollen collected from all conventional fields, but was not detected in pollen from organic fields. Corn pollen was only rarely collected from bumble bee foragers and the vast majority of pollen was from wild plants around the corn fields. All hives appeared healthy and neonicotinoid seed treatments had no effect on any hive endpoints measured, except the number of workers, where significantly fewer workers were recovered from hives placed next to conventional fields (96 +/- A 15 workers per hive) compared to organic fields (127 +/- A 17 workers per hive). The results suggest that exposure during pollen shed to corn grown from neonicotinoid-treated shed poses low risk to B. impatiens.