论文部分内容阅读
防治棉红蜘蛛一般用有机磷杀虫剂。由于害虫的抗性日益增强,而现有农药又易产生公害,因此筛选高效、低毒、低残留的抗生素,是防治棉红蜘蛛的新途径。我们用浅黄链霉菌韶关变种(Stre-ptomyces flaveolus var.Shaoguanensis n.var.)产生的孢内杀虫抗生素T_(21),经两年多室内和田间试验,防治棉红蜘蛛效果良好。 (一)材料与方法 1.药剂来源:均为市售化学农药。抗生素T_(21)供试样品,摇瓶发酵浸提液使用时,稀释10～20倍;浓缩液稀释30～60倍;工厂产品稀释200～500倍,均加0.1％海鸥洗涤液作粘着剂。使用浓度参照常用数。
Prevention and treatment of cotton spider mites commonly used organophosphate pesticides. Due to the increasing resistance of pests, and the existing pesticides are prone to public nuisance, screening of efficient, low toxicity and low residual antibiotics is a new way to control cotton spider mites. We used the spore insecticide T_ (21) produced by Streptomyces flaveolus var. Shaoguanensis n.var. After more than two years of indoor and field trials, we were able to control cotton spider mite effectively. (A) materials and methods 1. Pharmacy sources: all commercial pesticides. Antibiotics T_ (21) for the test sample, shake flask fermentation extract when used, diluted 10 to 20 times; concentrated solution diluted 30 to 60 times; factory product diluted 200 to 500 times, plus 0.1% seagull washing liquid as a binder . Use the concentration of common reference.