五种药剂对芒果及豆角田蓟马的防效试验

Efficacy trials of five pesticides against thrips from mango and cowpea

为筛鉴高效低毒的蓟马防治药剂,将20%烯啶虫胺AS等五种杀虫剂对芒果和豆角田蓟马进行了田间药效试验,通过虫口减退率和校正防效两个指标对试验进行结果分析。结果表明,20%烯啶虫胺AS对茶黄蓟马Scirtothrips dorsalis Hood和花蓟马Frankliniella intonsa Trybom两种蓟马的防效均较为突出,其中以1mL/L的20%烯啶虫胺AS效果最好,药后第5d对茶黄蓟马和花蓟马的防控效果还分别维持在84.18%、77.36%,持效期较长,其次0.5%印楝素EC+N-go对两种蓟马也有较好的防效。5%啶虫脒EC+N-go对茶黄蓟马的防效优于花蓟马,而20%啶虫脒*20%丁硫克百威WDG对花蓟马的防效优于茶黄蓟马。各药剂对两种作物较安全。

In order to search better insecticides, five different pesticides were tested on Scirtothripsdorsalis Hood and Frankliniellaintonsa Trybom. The effect of five insecticides was evaluated using the method of the density decrease and correction control efficiency. The results showed that the efficiency of the five insecticides had a great different. The 20% Nitenpyram AS had the best control on the two kinds of thrips, especially when the dosage of 1 mL/L was best, which efficiency for Frankliniellaintonsa Trybom and Scirtothripsdorsalis Hood were 84. 18% and 77.36% after 5 days,respectively, and it also had longer persistence. 0. 5% Azadirachtin ＋ N - go had better control on thrips too. In addition, 5% Cetamiprid EC ＋ N -go had better control on Frankliniellaintonsa Trybom than Scirtothripsdorsalis Hood, and 20% Acetamiprid ＊ 20% carbosulfan WDG was just the opposite. The five insecticides had better security on the mango and cowpea.