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目的 :测定西洋参种子分离真菌的致病性 ,并筛选对西洋参种传病原真菌有效的新型杀菌剂。方法 :幼苗期接种测定对西洋参的致病性 ,平皿菌丝生长抑制法进行杀菌剂的生物测定。结果 :镰刀菌Fusariumsp .5号菌株和链格孢菌Alternariasp .13号菌株对西洋参幼苗能致病。 3种杀菌剂中 ,施保克对 2种致病菌的抑制作用最强 ,多菌灵次之 ,适乐时的抑菌作用相对弱一些。结论 :施保克和适乐时可作为有效的候选药剂用于西洋参种子的药剂处理或种子包衣 ,替代生产上已使用多年的多菌灵 ,用来防治西洋参苗期病害。
OBJECTIVE: To determine the pathogenicity of American ginseng fungus isolated from seeds and to screen for a new fungicide effective against pathogenic fungi of American ginseng. Methods: The pathogenicity of American ginseng was determined by inoculation at seedling stage, and the bioassay of bactericide was carried out in the method of growth inhibition of plate mycelia. Results: Fusarium sp. 5 strain and Alternaria alternarius strain 13 could induce pathogenicity of American ginseng seedlings. Among the three kinds of fungicides, ShiPuKu had the strongest inhibitory effect on the two kinds of pathogenic bacteria, followed by carbendazim, and the bacteriostatic effect of Shifu was relatively weak. Conclusion: Shibucao and schoolex could be used as effective drug candidates for drug treatment or seed coating of American ginseng seeds, and instead of carbendazim, which has been used for many years in production, it is used to prevent and cure American Ginseng disease.