于八六年至八七年,我们省内外收集到了三株茶尺蠖核型多角体病毒(NPV),通过筛选,得到一株毒力较高的毒株:“Bm.NPV—I”,用此毒株分别接种2—3龄,3—4龄,4—5龄三个不同龄期的幼虫,测得“Bm.NPV—Ⅰ”这一毒株对2—3龄幼虫的敏感性最强,其感染死亡率97.14％。对3-4龄幼虫的感染死亡率为 88.57％,对4—5龄幼虫的敏感性最弱,其感染死亡率为40％。 From 1986 to 1987, we collected three strains of NPV from inside and outside our province. Through screening, we got a strain with higher virulence: “Bm.NPV-I” The strains were inoculated 2-3 age, 3-4 age, 4-5 age three larvae of different ages, measured “Bm.NPV-Ⅰ” strain of 2-3 instar larvae most susceptible Strong, its infection mortality rate was 97.14%. The mortality rate of infection to 3-4 instar larvae was 88.57%, the sensitivity to 4-5 instar larvae was the weakest, and the infection mortality rate was 40%.