【摘要】 本文介绍了以青虫菌6号为主体进行大面积防治试验,结果0.1∶7.5公斤/亩超低容量喷雾和常规喷雾0.1∶50公斤/亩,对小菜蛾、菜青虫和甘兰夜蛾幼虫3龄前有80.0—90.0%以上的防效;0.15∶50公斤/亩对小菜蛾、菜青虫有高效外,特别对甘兰夜蛾、菜青虫4—5龄幼虫有拒食增效作用和保护叶面完整的优势;青虫菌6号0.05∶50或0.1∶50公斤/亩对黄瓜蚜、甘兰蚜和茄蚜有68.65—98.73%的防效,0.1∶50—0.15∶50公斤/亩喷雾后对青椒蚜有99.0%的防效外,喷菌液后10天调查有分别降低花叶率42.86—71.43%的防效。BT乳剂0.5∶25公斤,每亩用稀释液7.5公斤超低容量喷雾防治小菜蛾有93.5%的防效,0.15∶50公斤/亩常规喷雾对菜青虫5龄幼虫有40.0—82.35%的防效,但叶面受害率100%;对甘兰夜蛾5龄幼虫有46.67—63.15%的死亡率,叶面受害率达34.25—49.52%。更多还原

【Abstract】 Through the large areas of controlling experiment to the diamond- ack moths,Plutella maculiponnis,caddge butterfly,Pieris rapae,by using difference ratios of 0.1:7.5kg/mu 0.1:50kg/mu(Bacteria liquid: Water/mu) of traditional spraying of Bucillus thuringiensis Var.Galler- iae,the results of controlling effcent can be reached at over82-90%, within 24-48 hours.Meanwhile,the results of controlling effcent to 4-5 instars larvae of the cabbage armyworm,Mamestra brassicae,are about 89.36-90.37%,except the high efficent of controlling diamond-back moths and cabbage butterfly by this kind of the pesticide under0.15: 50kg/mu So this pesticide have a function to force insect pests to induce eating and bring high results to the late instar larvae of cabbage butterf- ly and cabbage armyworm.The pesticide of B.thuringiensis Var Galleriae /Sumybus contains 0.3-0.5/1,000 bacteria liquid of 0.05:50 0.1:50kg/mu of permethrin,so its control efficent to sallov melon aphid,and the cabbage aphid can be reached at 68.65-90.69%.After spraying the pesticide at ratio of 0.1:50 or 0.15:50kg/mu to green pepper aphid,the controlling results can be got at 99%.From this test,we can investigate the reducing situation about the chlorosis CMV of the plents after 10 daysr,it can be reached 42.86-71.43%. The controlling efficent be using BT/Sumybus contains 0.2/1,000 bacteria liquid of 0.5:25 at the liquid of 7.5kg/mu,in ultra content spraying to diamond-back moths,can be reached 93.5%,and by using 0.15:50kg/mu to control P.rapae the fifth instar larvae of cabbage butt- erfly,the results are 55.88-82.35%,and the rate of the damaged larvae is about 100%,but the death of the M.drassicae fifth larvae of cabbage armyworm is about 46.667-63.15%.the rate of damaged larves is about 34.25-49.25%.更多还原