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闽北秋播油菜以白菜型为主,次为甘兰型。10月播种育苗,11月移栽。病毒病常年均有发生,唯程度不一。群众中有“秋旱病重”和“夏凉秋旱”之说,认为秋旱是病害流行的主要因素;而秋旱又与夏凉有密切关系。本文分析了夏凉秋旱对病害的影响及据此预测病害的可行性。 1.关于秋旱又病毒病重之说。按当地标准,从9月份开绐至11月,日降雨量少于2毫
North Fujian autumn rape cabbage-based, times as sweetlan type. Seeding nursery in October, November transplanting. Virus diseases occur all year round, but to varying degrees. Among the masses, there are “heavy autumn droughts” and “cool autumn droughts in summer,” saying that autumn droughts are the major factor in the epidemic of diseases. Autumn droughts are also closely related to summer cool. This paper analyzes the impact of summer cool autumn on the disease and the feasibility of disease prediction. 1. On the autumn drought and virus disease that heavy. According to local standards, from the beginning of September to November, the daily rainfall is less than 2 milliliters