Department of Animal Sciences, University of Wisconsin, Madison, Wisconsin, United States of America.
Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada.
PLoS One. 2018 Aug 6;13(8):e0201074. doi: 10.1371/journal.pone.0201074. eCollection 2018.
The insecticidal activity of parasiticide residues in dung of cattle treated with a sustained release eprinomectin formulation was examined, and an improved eprinomectin dung residue extraction method is presented. Emergent insect abundance and richness were significantly reduced in all post-treatment intervals (7, 14, 28, 56, 84, 112, and 140 d), relative to pre-treatment. Emergent insect diversity was reduced for between 84 and 112 d post-treatment. Collembola were not affected by residues. Chemical analyses subsequently documented residues of eprinomectin in dung of each collection period post-treatment at levels expected based on previously reported excretion profiles for this product. Cattle subcutaneously injected with this product excreted residues that reduced dung-breeding insect emergence for 5 mo post-treatment. The consequences of these long-term non-target effects to pasture ecosystems are not known.
研究了用阿维菌素控释制剂处理过的牛粪中杀虫剂残留的杀虫活性，并提出了一种改进的阿维菌素粪渣提取方法。与预处理相比，所有处理后间隔时间（7、14、28、56、84、112 和 140 天）的突发性昆虫丰度和丰富度均显著降低。处理后 84 至 112 天之间，昆虫多样性降低。残留对弹尾目昆虫没有影响。随后的化学分析记录了处理后每个收集期牛粪中的阿维菌素残留，其水平与该产品先前报道的排泄情况相符。牛经皮下注射该产品后，粪便中的残留可在 5 个月内减少粪便滋生昆虫的出现。这些长期非靶标效应对牧场生态系统的后果尚不清楚。
