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在丹东分离到的美国白蛾(Hyphantria cunea Drury)核型多角体病毒是一种致病力较强的毒株。感染三龄幼虫死亡率回归直线方程为:y=2.94+0.46x。Lc_(50)值为3.16×10~4PIB/毫升.设计的长90厘米、宽50厘米、高60厘米的繁毒箱,每箱次可繁殖病死虫尸2000余头,含多角体3.2×10~(-4)亿个。三年间经较大面积的防治试验,防治美国白蛾的适宜龄期为2～3龄,应用浓度0.67～1.8×10~7FIB/毫升,防治效果为87.8～99.3%。若与低浓度敌百虫混用,增效5～10%。
The Hyphantria cunea Drury nuclear polyhedrosis virus isolated in Dandong is a virulent strain. The regression equation for the mortality of third instar larvae was y = 2.94 + 0.46x. The value of Lc_ (50) is 3.16 × 10 ~ 4PIB / ml.The designed length of 90 cm long, 50 cm wide and 60 cm tall box can multiply more than 2,000 diseased dead worms per case, with polyhedron 3.2 × 10 ~ (-4) million. Three years after a large area of prevention and control trials, the control of the United States white moth suitable age for 2 to 3 years, the application concentration of 0.67 ~ 1.8 × 10 ~ 7FIB / ml, control effect of 87.8 ~ 99.3%. If mixed with low concentrations of trichlorfon, 5% increase in efficiency 10%.