蜡蚧轮枝菌与农药混配防治甘蓝蚜的研究

利用蜡蚧轮枝菌MZ041024菌株不同浓度的孢子液,与吡虫啉、灭多威、阿维菌素、乐斯本4种不同浓度的化学农药混配对甘蓝蚜防治效果的试验研究,结果表明,蜡蚧轮枝菌MZ041024菌株孢子液在4 900～4.9亿个/ml浓度对甘蓝蚜具有一定的防治效果,随着浓度增加而防效提高,0.49亿个/ml和4.9亿个/ml浓度时效果最好,死亡率达64.69%.在分生孢子液为0.49亿个/ml与4种不同浓度的化学农药混用增效比较中,吡虫啉最高增效9%,与灭多威等混用则表现出拮抗作用.因此从生物防治和IPM等方面来看, 蜡蚧轮枝菌MZ041024菌株具有重要的研究价值和开发前景.

Study on Compounds of Verticillium Lecanii(MZ041024) and Pesticide on Brevicoryne Brassicae L

The virulence of the isolation of Verticillium lecanii(MZ041024) against Brevicoryne brassicae L with different conidia concentrations and four insecticides was studied.The results indicated that the concentrations during 4.9×10~3～4.9×10~8 conidia/ml of verticillium lecanii had some effects to control Brevicoryne brassicae L,and the mortality was increasing with the enhancement of conidia concentrations,and 4.9×10~7 and 4.9×10~8 conidia/ml had the highest mortality of 64.69%.The compounds of Verticillium lecannii in 4.9×10~7 conidia/ml and four kinds of pesticides had a stronger virulence to Brevicoryne brassicae L.Comparing with other insecticides,Imidacloprid was best,the mortality raised 9%.Thus MZ041024 strain had a significant research value according to biological control and IPM.