论文部分内容阅读
杨毒蛾Leucoma Candida Studinger 是我区杨树主要害虫之一,在德龙岗上的几个林场经常发生,危害较大。多年来,采用化学防治,收到一定效果。但是,由于连年使用化学林药,使该虫失去了自然控制力。近几年来采取喷洒苏云金杆菌的防治方法,效果很好,只是常量喷洒用水量较大,大面积防治运水较困难。为寻求节水途径,又对人畜无害的药剂,
Leucoma Candida Studinger is one of the main pests of poplar in our district, and some farms in Delonggang often occur, which is more harmful. Over the years, the use of chemical control, received a certain effect. However, due to years of use of chemical forest medicine, the insect loses its natural control. In recent years, spraying Bacillus thuringiensis prevention and control methods, the effect is very good, but a large amount of constant spray water, large areas of water more difficult to prevent and control. To seek ways to save water, but also harmless to humans and animals,