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采用室内菌丝生长抑制法系统测定了苦参碱、宁南霉素单剂及其多种组合混剂对 引起大豆根腐病的瓜果腐霉菌的抑制作用,结果表明,苦参碱、宁南霉素单剂及其多种组 合混剂对供试病菌菌丝生长有良好的抑制作用,当苦参碱与宁南霉素以4．0:2．5的比例混合 后抑制作用最强,增效值为1．96,表现明显增效作用。田间试验结果也证明该混剂可有效 控制大豆苗期根腐病,当以6．5％苦·宁种子处理可分散粉剂按种子重量1．0:100包衣时的防 治效果可达72．4％。
The inhibitory effects of matrine and ning nanmycin single agents and their combination on the growth of Pythium melilotoides causing soybean root rot were determined by indoor mycelium growth inhibition method. The results showed that matrine and ningjing A single dose of nystatin and its multiple combinations have a good inhibitory effect on mycelial growth of the tested bacteria. When matrine and ningamycin are mixed in a ratio of 4.0: 2.5, the inhibition effect is the strongest , Systolic value of 1.96, showing significant synergies. The results of field experiments also proved that the mixture can effectively control soybean root rot at seedling stage, and the control effect when using 6.5% Kuhin Ning seed dispersible powder coated by the seed weight 1.0: 100 can reach 72. 4%.