生防菌绿色木霉对几种枯萎病菌的抑制作用

Inhibition of Trichoderma on Some Fusarium Pathogens

为了比较木霉菌(Trichoderma)对植物病原菌的拮抗作用效果,利用对峙平板法测定了绿色木霉菌及木霉菌和杀菌剂联合使用对几种枯萎菌的拮抗作用。通过对峙培养可以观察到,多数情况下,接种后3d内绿色木霉菌即可与病原菌接触,随后覆盖或侵入病原菌菌落内,从而抑制或阻碍其生长。木霉菌单独使用时有一定的抑菌效果,与杀菌剂联合使用比单用杀菌剂效果更显著,其中以绿色木霉菌+咪酰胺联合使用的效果最好,对西瓜枯萎病菌的抑制率达到了79.3%,对香蕉枯萎病1号小种的抑制率达到59%。

The inhibition of Trichoderma on the antagonism of Fusarium pathogens was studied. The results were determined by using of confrontation strains with Trichoderma viride alone or combined with fungicides for some Fusarium pathogens. Confrontation between the cultures can be observed. In most cases, within 3 d after inoculation with Fusarium, Trichoderma v iride could be contacted,and then covered or invasived into pathogen＇s colony,which inhibited or impeded their growth. Trichoderma combined with fungicides had a more effect than Trichoderma alone.