水稻恶苗病菌对使百克、多菌灵的抗性遗传研究

The resistant inheritance of Fusarium monilifore to Prochloraz and Cabendazim

采用使百克、多菌灵对病原菌直接进行诱变,获得相应的抗性菌株,对其抗性遗传规律进行研究。结果表明,安徽省水稻恶苗病菌对多菌灵已产生了中等程度的抗药性,对使百克的抗性较低。通过多菌灵、使百克诱变均都能产生抗性菌株,但就抗性增长速度而言,多菌灵远高于使百克。产生抗性的突变菌株后代表现说明,多菌灵的抗性突变菌株遗传较稳定。单剂诱变的抗性菌株致病性高于复配剂诱变菌株和敏感菌株。

The resistant strains were obtained by inducing Fusarium monilifore with Prochloraz and Cabendazim, the inheritance of the mutants were also tested. The results showed that Fusarium monilifore in Anhui Province had mid-resistance to Cabendazim, and had low resistance to Prochloraz. The resistant growth rate of the strains induced by Cabendazim was faster than that by Prochloraz. The resistant inheritance of the mutant strains to Cabendazim was steadily. The pathogenicity of the mutants, induced by single-fungicide was stronger than that by mix-fungicide.