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田同试验结果表明:大菜粉蝶颗粒体病毒(PbGV)防治甘蓝地上菜粉蝶幼虫的最低有效剂量在2.3×10~(10)～3.4×10~(10)颗粒体/亩之间;病毒的喷布应在寄主卵与低龄幼虫的高峰期进行,春夏季以在田间寄主卵孵化率近20％时使用为宜。喷布的雾滴细,可以提高防治效果。病毒与乐果、氧化乐果、乙酰甲胺磷等农药临时混用。不降低防治效果,降雨对病毒防治效果的影响不明显。在135.8亩的肪治示范试验中,菜粉蝶的虫口减退率均在90％以上,效果好且稳定。
The results of field experiment showed that the minimum effective dose of P. griseus particle-borne virus (PbGV) for controlling cabbage butterfly larvae was between 2.3 × 10 ~ (3) ~ 3.4 × 10 ~ (10) Cloth should be carried out in the peak of the host eggs and young larvae, spring and summer in the field when the host egg hatching rate of nearly 20% is appropriate. Spray fine droplets, can improve the control effect. Virus and dimethoate, omethoate, acephate and other pesticides temporary mix. Without reducing the control effect, the effect of rainfall on the virus control effect is not obvious. 135.8 mu in the rule of fat governance demonstration, cabbage butterfly insects population decline rate of 90% or more, the effect is good and stable.