摘要
以二斑叶螨为Tetranychus urticae Koch试虫,采用田间药效试验的方法,研究了乙唑螨腈等6种杀螨剂对二斑叶螨的田间防效及对草莓的安全性。以期为草莓二斑叶螨防控提供高效、安全的杀螨剂。结果表明:30%乙唑螨腈悬浮剂速效性与持效性最好,药后1 d的防效为91. 80%,14 d防效为95. 56%; 20%丁氟螨酯悬浮剂和100g/L联苯菊酯乳油2种药剂的速效性较好,持效性较差,药后1 d防效在83%~89%,药后14 d的防效在27%~46%; 43%联苯肼酯悬浮剂在药后3 d的防效最高,达到87. 87%; 1. 8%阿维菌素乳油在药后1~14 d防效在36%~72%之间。73%炔螨特乳油在365 mg/L浓度下对草莓叶片产生药害,其它药剂对草莓安全。
In order to find the effective and safe acaricides to control two-spotted spider mite,the safety of six acaricides on strawberry and their field efficacy against two-spotted spider mite were studied using Tetranychus urticae Koch as trial insect. The results showed that SYP-9625 30% SC had best fast-acting and long-lasting effect to two-spotted spider mite,with the control efficacy of 91. 80% after one day of application and 95. 56% after 14 days. Cyflumetofen 20% EC and bifenthrin 100 g/L EC performed well in quick-acting but bad in persistence,the control efficacy was 80% ~ 89% after one day of application and 27% ~ 46% after 14 days of application. Bifenazate 43% SC provided the best control efficacy of 87. 87% after 3 days of application. The control efficacy of abamectin 1. 8% EC was 36% ~ 72% after 1 ~ 14 days of application. Propargite 73% EC at 365 mg/L produced phytotoxicity to strawberry leaves,while the other acaricides were safe for strawberry.
引文
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