摘要
田间试验结果表明:25%甲维·毒死蜱水乳剂不同剂量对菜青虫2龄幼虫速效性好、持效期长,药后1～3d防效可达91.00%～100%,药后7d,对菜青虫的控制效果仍有87.05%～94.99%,与对照药剂甲维盐相近,极显著优于毒死蜱处理。25%甲维·毒死蜱水乳剂推荐用量为750mL/hm2(制剂用量),防治适期宜掌握在2龄幼虫前。
Field test results showed that the different doses of emamectin benzoate, ehlorpyrifos 25% EW had good quick-acting and long duration against the 2nd instar larvae ofPieris rapae. The control effect was up to 91.00-100% after treatment with 1-3 d and the control effect was still 87.05-94.99% after 7 days. The effect of emamectin benzoate. chlorpyrifos 25% EW was similar to pharmaceutical emamectin benzoate, very significantly better than the ehlorpyrifos treatment. Thus, the recommended dosage of emamectin benzoate- chlorpyrifos 25% EW was 750 mL/ha （agent dosage） against 2nd instar larvae ofPieris rapae.
出处
《农药》
CAS
北大核心
2010年第3期216-217,共2页
Agrochemicals
基金
镇江市工业攻关项目(GY2008008)
关键词
甲维·毒死蜱
菜青虫
防治效果
emamectin benzoate.chlorpyrifos
Pieris rapae
control effects
