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由于长期使用化学农药杀虫剂,致使棉铃虫产生较高的抗药性,用药量成倍增加,防治效果逐年下降,一般番茄减产20％～30％,严重的减产50％以上;并杀伤天敌,污染环境及农产品,影响我市的番茄生产和加工出口。1994年我站引进北京农大微生物发酵实验厂生产的l.8％爱福丁(BA一1)抗生素杀虫剂进行田间试验和示范,防治效要达到98％以上,保果率达到99.1％,番茄增产54.4％。试验示范结果证明,爱福丁(BA一1)乳油喷雾防治棉铃虫,对孵化的出壳期幼虫或初出壳的幼虫有较高的杀伤作用,对防治
As long-term use of chemical pesticides, resulting in high resistance to cotton bollworm, the dosage doubled, the control effect decreased year by year, the general reduction of 20% to 30% of tomatoes, a serious reduction of more than 50%; and natural enemies, Pollution of the environment and agricultural products, affecting the city’s tomato production and processing exports. In 1994, we introduced 1.8% avermectin (BA-1) antibiotic insecticide produced by Beijing Agricultural University Microbiological Fermentation Experimental Plant to carry out field experiments and demonstrations. The control effect reached more than 98%, the fruit preservation rate reached 99.1% Tomato yield 54.4%. Test results show that the proof of aphidin (BA-1) EC spray control bollworm hatching larvae hatchling or early shell larvae have a higher killing effect on the prevention and treatment