七种化学杀虫剂与球孢白僵菌TST05菌株的相容性研究

本文测定了7种常用化学杀虫剂高效氯氰菊酯、高氯甲维盐、辛硫磷、高效氯氟氰菊酯、阿维菌素、阿维杀虫单、虫酰肼对球孢白僵菌TST05菌株菌丝生长及孢子萌发、生长及产孢的影响,以研究化学药剂与球孢白僵菌TST05菌株的相容性,为化学杀虫剂和白僵菌制剂混合应用提供依据.结果表明,在田间常用浓度下,7种杀虫剂对该菌株的菌丝生长抑制率为27.93％～38.74％.虫酰肼组的孢子萌发率为33.19％,几乎不形成菌落,产孢量仅为0.05×106个/mL；而其余6种杀虫剂组的孢子萌发率为50.34％～70.62％,能形成较致密的菌落,产孢量为(2.51～3.58)×106个/mL.杀虫剂对该菌株的抑制作用随着浓度的降低而减小,田间浓度再稀释5倍后,各处理组孢子萌发率升高到72.08％～84.92％;产孢量为(3.01～9.61)×106个/mL.在田间浓度下,虫酰肼与该菌株不相容；其余6种杀虫剂的相客性较好.并且相客性随着杀虫剂浓度的降低而提高.

Compatibility of seven chemical pesticides with Beauveria bassiana strain TST05

The effects of seven common chemical pesticides,including beta-cypermethrin,cypermethrin-emamectin benzoate,phoxim,lambda-cyhalothrin,abamectin,abamectin-monosultap and tebufenozide on mycelial growth,spore germination and spore yield of Beauveria bassiana strain TST05 were tested to explore the compatibility of chemical pesticides with B.bassiana strain TST05,and provide experimental evidence for combined application in fields.The inhibition rate of the pesticides to mycelial growth was 27.93%-38.74% at conventional field concentrations.In tebufenozide group,the rate of spore germination was 33.19%,with a spore yield of only 0.05×106 conidia/mL,while in other groups,the rate of spore germination ranged from 50.34% to 70.62%,and the spore yield was around(2.51-3.58)×106 conidia/mL.The inhibition of the pesticides to the strain decreased with decreasing concentrations.After being diluted 1∶5,the rate of spore germination was up to 72.08%-84.92%,and the spore yield was about(3.01-9.61)×106conidia/mL.Except tebufenozide,the compatibility of the other six pesticides with B.bassiana strain TST05 was relatively good.And the compatibility was increased with the decrease of pesticide concentrations.