Abstract:

Helminthosporium gramineum Rabenhf．sp．echinochlone (HGE), a promising fungus for controlling barnyardgrass, was evaluated for biocontrol of rice bacterial leaf stripe caused by Xanthomonas oryzae pv oryzacola. The filtrate and crude toxins (ethyl acetate extract of culture filtrate of HGE) of HGE were tested with the method of stiletto, and measured in MIC(Minimun Inhibitory Concentration) and MBC(Minimal Bacteriocidal Concentration), compared with the checks of 20% thiodiazole-copper, 72% streptomycin sulfate and bismerthlazol. The result indicated that the biocontrol effect from the treatment of the crude toxins of HGE was much better than those of other treatments.