飞机喷洒Bt粉剂防治天然胡杨林春尺蠖技术

Aerial spray of Bt WP against Apocheima cinerarius in the natural forests of Populus euphratica

应用Y-5B型飞机低量喷洒16 000 IU/mg的Bt可湿性粉剂防治天然胡杨林春尺蠖,用量为1 500 g/hm2和1 200 g/hm2。结果表明两种剂量都具有高效持效的特点,1 200 g/hm2可使虫口减退率达到97%,有效地减轻了春尺蠖对新疆天然胡杨林的危害,防治成本有所下降。

The experiment showed that the control effect of low volume spray of 16 000 IU/mg Bt WP at the dosage of 1 500 g/hm^2 and 1 200 g/hm^2 against Apocheima cinerarius in the natural forests of Populus erphratica by Y-5B airplanes was high and longlasting. The application of 1 200 g/hm^2 can kill 97% of the pest. The harm of Apocheima cinerarius in the natural forests of Populus euphratica decreased rapidly. And the cost was lower.