Individual and combined toxic effects of cypermethrin and chlorpyrifos on earthworm.

Individual and combined toxic effects of cypermethrin and chlorpyrifos on earthworm.
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氯氰菊酯和毒死蜱对蚯蚓的单独和联合毒性作用。

DOI:
10.1016/s1001-0742(10)60462-7
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发表时间:
2011-04
影响因子:
6.9
通讯作者:
Michelle W H G(段昌群指导的研究生)
Michelle W H G(段昌群指导的研究生)
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
周世萍(段昌群指导的研究生);段昌群;Michelle W H G(段昌群指导的研究生)

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对拟除虫菊酯(氯氰菊酯)和有机磷杀虫剂(毒死蜱)单独和联合使用的毒性进行了评估。对臭爱森蚓的急性、慢性和行为性反应进行了一系列试验,并对农药的生态风险进行了评价。结果表明,氯氰菊酯与毒死蜱混用对蚯蚓的毒性显著高于单独使用,特别是对蚯蚓的慢性反应。在浓度为5 mg/kg时,混合物对蚯蚓的生长和繁殖率有显著降低,但对个体进行测试时没有任何显著影响。混合农药毒性的增加意味着,使用仅从单一农药实验中获得的毒性数据可能低估了实际存在于田间的农药的生态风险。
Toxicities were assessed for a pyrethroid (cypermethrin) and an organophosphate insecticide (chlorpyrifos) individually and in combination. A series of tests were conducted on different responses (acute, chronic, behavioral) of earthworms of speciesEisenia fetida andreiin the ecological risk assessment of these pesticides. The results showed that the toxicity of the mixture of cypermethrin and chlorpyrifos was significantly higher than either of these pesticides individually, especially on the earthworm's chronic responses. At a concentration of 5 mg/kg, the mixture caused significant reductions on the growth and reproduction rates of earthworms, but did not cause any significant effect when the individual was tested. The increase in toxicity of the pesticide mixture means that the use of toxicity data obtained exclusively from single-pesticide experiments may underestimate the ecological risk of pesticides that actually present in the field.
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