灭幼脲Ⅲ号不同剂量及不同机型防治美国白蛾试验

Aerial control against Hyphantria cunea with chlorbenzuron Ⅲ at different doses and different types of aircrafts

利用M-18、运五(Y-5)、海燕650 B型3种机型飞机喷洒300,375,450,525,600 g/hm25种剂量的25%灭幼脲Ⅲ号防治3～4龄美国白蛾。试验结果表明:450,525,600 g/hm23种剂量的25%灭幼脲Ⅲ号施用11 d后,防治效果均达到95%以上。考虑防治成本和环境安全因素,推荐用药量为450 g/hm2。

Chlorbenzuron Ⅲ 25% was sprayed at the doses of 300,375,450,525,600 g/hm^2 against Hyphantria cunea with M-18, （Y-5） and Petrel 650 B aircraft. The results showed the control effects of chlorbenzuron Ⅲ 25% at the doses of 45 0,525,600 g/hm^2 were above 95% 11 days after the treat-ment. Considering the cost of control and environmental-friendly factors, the dose of 450 g/hm^2 was recommended in the control.