To clear the degradation regularity of propargite in apple, the liquid chromatography was applied to study the residue and degradation dynamics of 20% propargite agent in apple and soil. The results showed that the ha...To clear the degradation regularity of propargite in apple, the liquid chromatography was applied to study the residue and degradation dynamics of 20% propargite agent in apple and soil. The results showed that the half life of propargite in apple was 14.6-36.2 d, which was 7.1-8.6 d in soil. When the dosage of 20% propargite agent was 1 500-3 000 ml/hm^2, and the agent was sprayed for 2-3 times, the residues in apple and soil were less than 1.28 mg/kg. With comprehensive consideration on environmental safety, when 20% propargite agent was used to control apple mites, the recommended dosage was 1 500 ml/hm^2, the agent could be sprayed for 2-3 times, and the safety interval was 14 d.展开更多
文摘To clear the degradation regularity of propargite in apple, the liquid chromatography was applied to study the residue and degradation dynamics of 20% propargite agent in apple and soil. The results showed that the half life of propargite in apple was 14.6-36.2 d, which was 7.1-8.6 d in soil. When the dosage of 20% propargite agent was 1 500-3 000 ml/hm^2, and the agent was sprayed for 2-3 times, the residues in apple and soil were less than 1.28 mg/kg. With comprehensive consideration on environmental safety, when 20% propargite agent was used to control apple mites, the recommended dosage was 1 500 ml/hm^2, the agent could be sprayed for 2-3 times, and the safety interval was 14 d.
