Effect of Ten Insecticides on Conidial Germination and Colonies Growth of Beauveria brongniartii

doi:10.16409/j.cnki.2095-039x.2016.04.005

Abstract

Abstract: Mixture of Beauveria brongniartii and insecticides is an effective measure to increase the pest control efficacy of B. brongniartii. Effects of ten widely used pesticides on conidial germination and colony growth of B. brongniartii srain NEAU30503 were measured by mixing them for different durations. The results showed that pesticide, mixture concentration and duration affect conidial germination and colony growth significantly. All the pesticides showed an increased inhibition of conidial germination with increases in their mixture concentrations. Lambda-cyhalothrin and acetamiprid showed slight inhibition, while phoxim emulsifiable concentrate and omethoate had strong inhibition of conidial germination. Inhibition of conidial germination was generally heightened with extended mixing duration, but was not different between 1 and 5 d mixtures of lambda-cyhalothrin or chlorpyrifos with the conidial. Acetamiprid showed the minimal inhibition of colonies growth while phoxim showed the strongest. The acetamiprid and pyrethroid insecticides were more compatible with B. brongniartii srain NEAU30503 than the other insecticides. These results provide an experimental basis for rational use of B. brongniartii in mixture with pesticides.

Key words: Beauveria brongniartii, insecticide, conidial germination, colony, compatibility

CLC Number:

S476.12

YU Hongchun, DU Juan, SONG Longteng, SUN Yifeng, LIU Conghe, ZHAO Kuijun, LI Kebin, XU Guoqing. Effect of Ten Insecticides on Conidial Germination and Colonies Growth of Beauveria brongniartii[J]. journal1, 2016, 32(4): 449-455.

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