两种取食刺激物对AcNPV和Bt增效的作用

A Study of Feeding Adjuvant Synergy on AcNPV and Bt

取食刺激物使害虫幼虫在初期摄入更多的活性成分能提高病毒感染效果.室内以蜂蜜和新鲜小白菜汁分别添饲银纹夜蛾幼虫,测定了其对AcNPV和Bt的增效作用,结果表明：在中低浓度AcNPV时,蜂蜜和新鲜小白菜汁液刺激银纹夜蛾幼虫初期取食,其感染后前3 d的粪便量比只有AcNPV处理的增加34.51%-79.60%,幼虫死亡率提高8.89%-13.33%,LT50缩短1.4-2.7 d.蜂蜜提高了Bt对银纹夜蛾幼虫的死亡率,但死亡速度未见明显加快.

The synergy of honey and cabbage filtrate on Autographa Californica nuclear polyhedrosis virus（Ac-NPV） and Bacillus thringiensis （Bt） against the larvae of plus agnate was studied. The results indicated that the percentage pf mortality of the layvae and the diet consumption in the first 3 days after inoculation increased by 34.51%-79.60%, the percentage of morality of the larvae increased by 8.99%-13.33% ,and LT50 shorted by 1.4- 2.7 d compared with those in AcNPV only treated. As for Bt honey also raised the larvae morality, but the- death process showed no differences.