论文部分内容阅读
本文采用田间实验方法,研究了植物源农药博落回杀菌剂在露地不结球白菜(俗称小白菜,Brassica rapa L.Chinensis Grou)及土壤中的残留量变化,为其在无公害农产品的生产方面提供参考。结果显示:分别以浓度750 g/hm2、1 500 g/hm2的博落回杀菌剂处理露地小白菜,其在露地小白菜中的残留降解动态变化表现为前5 d降解较快,15 d以后基本无残留;而在土壤中的残留降解动态变化则表现为前7 d降解缓慢,7 d后降解速度则大大加快,32 d以后基本无残留;其农药残留半衰期分别为1.83 d和8.37 d,且最后残留量都低于我国对植物源农药的残留最大允许限量0.500 0 mg/kg。因此,博落回在露地小白菜及土壤中属易降解、低残留、安全性较高的植物源农药,适合在农业生产方面推广使用。
In this paper, field experiments were conducted to study the changes of residues of plant-derived pesticides in the non-heading Chinese cabbage (Brassica rapa L.Chinensis Grou) For reference. The results showed that the dynamic changes of residual degradation of Chinese cabbage in open cabbage with 750 g / hm 2 and 1 500 g / hm 2 respectively were rapidly degraded in the first 5 days. After 15 days And no residue remained in the soil. However, the dynamic changes of residual degradation in soil showed that the degradation was slow in the first 7 days and accelerated rapidly after 7 days, and remained basically no residue after 32 days. The half lives of pesticide residue were 1.83 d and 8.37 d, And the final residues are lower than the maximum allowable limit of 0.500 0 mg / kg for plant-derived pesticides in China. Therefore, Botanica back in the open cabbage and soil is easily degradable, low residue, high safety of plant-derived pesticides, suitable for agricultural use.