利用昆虫天敌来防治害虫,已有许多成功的事例,并显示出了它一定的优越性。1978年我们在汨罗县明月大队大量罹病的稻飞虱(Nilaparuata lugens Stal)上分离到一株昆虫致病菌,经鉴定该菌属粘质沙雷氏菌(Serratia marcescens)。田间试验表明,防治稻飞虱有良好的效果。被感染粘质沙雷氏菌的稻飞虱,死虫初死时柔软,腹部膨大,很易弄破流出红色液体,死后躯体变红。现将结果报道如下。 The use of insect natural enemies to control pests, there have been many successful examples, and showed some of its superiority. In 1978, we isolated an insect pathogen on Nilaparuata lugens Stal, a large-scale diseased plant in the Mingyue Brigade in Miluo County, which was identified as Serratia marcescens. Field experiments show that the prevention and treatment of planthoppers have a good effect. Infected with S. marcescens planthoppers, dead insects first soft, swollen abdomen, it is easy to break out of the red liquid, the body becomes reddish after death. The results are reported below.