烟草野火病发病规律的研究

１９９１￣１９９５年对烟草野火病发病规律进行了研究。结果表明：烟草野火病的初侵染来源主要是田间越冬的病残体及带菌种子，种皮内外及胚均可带菌，感病品种带菌率为８％￣１６％，病菌以轻口侵入为主要，其次是自然孔口，病害的发生与气候条件，品种，施肥，播期关系密切，气候条件中的雨量，雨日对病害影响最大。

Study on Occurence Role for Tobacco Wildfire Disease

Experiments on tobacco wildfire disease from 1991 to 1995 have demonstrated that the field primary infection source of disease mainly comes from tobacco refuse and infected seeds with bacteria in testa and endosperm. The important infection routs of the bacteria are small wounds, secondarily stomatas. The occurence of disease are closely with weather condition, varieties fertilizers and sowing time, among weather condition, rainfall and rainday have a great effect on the disease.