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病毒病、软腐病、霜霉病是秋白菜的三大病害。在阿克苏英瓦提地区,因病而损失的产量,一般达30—40％,严重的片叶无收。一九六二到一九六四年,我们曾进行过试验和调查,结果如下: 一、播种期与发病的关系 1.早播,幼苗期高温干燥,适于蚜虫大量滋生繁殖,传染病毒;同时,早播封行早,后期软腐病、霜霉病的发病指数高。 2.晚播,苗期躲过了高温,包心期已转入适温与低温阶段,蚜虫传毒的机会较少,发病期也推迟,发病程度轻。但播种过晚,生长期不足,包心不良,产量和质量都低。
Virus disease, soft rot, downy mildew is the autumn disease three major diseases. In the Aksu region of Invati, the loss of disease due to the production, usually up to 30-40%, serious leaves without revenue. Between 1962 and 1964, we conducted tests and surveys. The results are as follows: I. The relationship between sowing date and incidence 1. Early sowing, high temperature drying seedling, suitable for aphid large breeding, infectious virus; At the same time, early sealing sowing early and late soft rot, downy mildew incidence index high. Late seeding, seedlings escaped the high temperature, the package phase has been transferred to the appropriate temperature and low temperature stage, fewer opportunities for aphids poisoning, the onset is also delayed, the incidence of light. However, sowing too late, lack of growth, bad heart, yield and quality are low.