5种除草剂对白僵菌孢子萌发的影响

Influence of Five Herbicides on Spore Germination of Beauveria bassiana

[目的]论证5种除草剂对2种寄生型白僵菌孢子萌发的影响。[方法]根据农药室内生物测定试验准则—抑制病原真菌孢子萌发试验凹玻片法。[结果]精异丙甲草胺、硝磺草酮对2种寄生型白僵菌孢子萌发抑制最为明显,与其他几种除草剂比较,差异性显著;而激素性除草剂二氯吡啶酸、氯氟吡氧乙酸对寄生于玉米螟型白僵菌孢子萌发影响不大,莠去津对2种寄生型白僵菌孢子萌发都有影响,与空白对照比较,差异显著。[结论]白僵菌的储存、使用,应尽量避开除草剂,特别是要避开精异丙甲草胺、硝磺草酮等药剂。

[Aims] In order to clarify impact of 5 herbicides on spore germination of 2 types of parasitic Beauve-ria bassiana. [Methods] Following pesticides guidelines for laboratory bioactivity tests part 1： determining fungicideinhibition of pathogen spore germination. [Results] Compared with several other herbicides（atrazine, fluroxypyr andclopyralid）, s-metolachlor and mesotrione restrained 2 types of Beauveria bassiana more significantly. Fluroxypyrand clopyralid showed little influence on it, and Atrazine demonstrated significant influence against the CK. [Con-clusions] Beauveria bassiana should be separated from herbicide when it be stored and used, especially dividedfrom s-metolachlor, mesotrione and atrazine.