环境因素对薏苡黑粉病菌冬孢子活力的影响

Environment Factor Influence on Coix Lachryma-jobi Ustilago Winter Spore Vitality

薏苡黑粉菌的冬孢子在室内干燥条件下,可以存活5年左右,北京地区田间地表及地下5cm 深处的冬孢子均可以安全越冬,增加土壤湿度有利于降低土壤中越冬孢子数量。病田轮作大豆、山药等作物安全期至少为2年。

Coix lachryma-jobi ustilago winter spore can live abolut five years under room drying condition.The winter spore at field surface and ha the 5cm depth of underground in the Beijing area can safely live through the winter.Increase of soil humidity is of benefit to reduce overwintering spore quantity in the soil. Crop safety period of disease field rotation of soybean and Chinese yam etc.is at least two years.