大麦条纹病侵染研究

Infection of barley stripe disease

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。

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 de- pended on the amount of initial infection and climatic conditions.