大麦条纹病侵染研究

针对大麦条纹病初侵染源和再侵染问题,进行了田间试验测定和大量的调查分析,明确了种子带菌是大麦条纹病的主要初侵染源。病指比较,种子带菌占整个初侵染源的90．8％,发病率比较,种子带菌占整个初侵染源的75％。种子消毒处理,能很好的控制大麦条纹病的发生发展。土壤中残存的大麦条纹病病菌,也是大麦条纹病的初侵染源,但在整个初侵染源中所占比例很小。大麦条纹病再侵染程度主要取决于初侵染量和气候条件。

Infection of barley stripe disease

In this paper,the result of field experiments showed that the seed-borne fungus was the main primary infection source of barley stripe disease.Disease index and the infection of seed-borne fungus were 90.8% in total primary infection,but by comparing the incidence of barley stripe disease,it was 75%.Seed treatment could effectively control barley stripe disease.The fungus remained in the soil also was primary infection source,but it has only a very small proportion.Re-infection of barley stripe disease mainly depended on the amount of initial infection and climatic conditions.