论文部分内容阅读
该文应用新型苏云金杆菌（Ｂｔ）分别于室内和室外对防治美国白蛾Ｈｙｐｈａｎｔｒｉ－ａ Ｃｕｎｅａ（Ｄｒｕｒｙ）进行了药效试验。幼虫１～２ 龄时应用浓度为１０００～１２００倍液；３～４ 龄时为８００～１０００倍液；５龄以上应为５００～８００ 倍液
In this paper, a new type of Bacillus thuringiensis (Bt) was used to control the efficacy of Hyphantri-a Cunea (Drury) in indoor and outdoor respectively. Larvae 1 to 2 age application concentration of 1000 to 1200 times; 3 to 4 age 800 to 1000 times the liquid; more than 5 years should be 500 to 800 times the liquid