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为评价20.00%啶虫脒可湿性粉剂在棉花上使用后的残留动态及环境安全性,在新疆和陕西省进行了其在棉花上的残留动态和最终残留实验。棉花和土壤样品用乙腈提取,SPE柱净化,经岛津气相色谱仪ECD检测器测定其残留量。结果表明:20.00%啶虫脒半衰期在棉花中为2.0~2.9 d,土壤中为1.8~2.3 d。建议20.00%高效氯氟氰菊酯在推荐剂量下最多施药3次,安全间隔期为7.0 d。
In order to evaluate the residue dynamics and environmental safety of 20.00% acetamiprid WP after it was used on cotton, its residual activity on cotton and final residue experiments were carried out in Xinjiang and Shaanxi Provinces. Cotton and soil samples were extracted with acetonitrile and cleaned up by SPE column. The residue was determined by Shimadzu gas chromatograph ECD detector. The results showed that the half-life of 20.00% acetamiprid was 2.0-2.9 days in cotton and 1.8-2.3 days in soil. It is recommended that 20.00% lambda-cyhalothrin be applied up to 3 doses at the recommended dose with a safety interval of 7.0 d.