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应用活体增殖病毒 ,制备甘蓝夜蛾核型多角体病毒杀虫剂乳剂 ,室内对 4龄甘蓝夜蛾幼虫的毒力测定 ,其LD50 为 9 4 2× 1 0 3 PIB/头。田间防治效果表明 ,采用 1 0× 1 0 11PIB/hm2 和 3 0× 1 0 11PIB/hm2 的剂量防治甘蓝夜蛾的效果都在 70 %以上。乳液的稳定性较好 ,粘着性较强
The in vivo application of the live-proliferating virus to the cabbage budworm moth nuclear polyhedrosis virus insecticide emulsion was conducted to determine the toxicity of 4th instar larvae of cabbage budworm, with an LD50 of 9 4 2 × 10 3 PIB / head. The results of field control showed that the control effects of the dosage of 110 × 10 11 PIB / hm2 and 30 × 10 11 PIB / hm2 on the control of cabbage budworm were over 70%. Emulsion stability is better, better adhesion