松毛虫在我省连年发生,大面积松林遭到严重破坏。三十多年来,采用过人工捕打、化学药剂、生物防治等多种措施,对保护松林起到了很大作用。但由于长期、大量使用化学杀虫剂,致使松毛虫抗药性不断增长,用药量及用药次数逐年加大,防治成本不断升高,而防效则逐年降低。并使环境受到污染,造成人畜中毒,并杀害了大量昆虫天敌和其它有益生物,破坏了松林内生物间相互制约和相互依存的生态平衡。 近年来,国内外研制出一种对鳞翅目幼虫有毒杀特效的HD—1杆菌制剂,广泛地应用于农、林、果和蔬菜等害虫的防治,取 Pine caterpillars occur in our province year after year, a large area pine was severely damaged. Thirty years, the use of artificial catching, chemical agents, biological control and other measures to protect pine forest has played a significant role. However, due to long-term, large-scale use of chemical insecticides, resulting in the increasing resistance of pine caterpillars, the dosage and the number of drugs increased year by year, prevention and control costs continue to rise, while the control effect is reduced year by year. And pollute the environment, poisoning humans and animals, killing a large number of insect natural enemies and other beneficial organisms, and undermining the ecological balance of mutual restraint and interdependence among the organisms in pine forests. In recent years, a kind of HD-1 bacilli preparation has been developed at home and abroad, which is toxic and effective to kill Lepidoptera larvae. It is widely used in the prevention and control of pests such as agriculture, forestry, fruits and vegetables.