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句容市菜区一年四季都有芹菜生长 ,致使芹菜病毒病有逐年加重的趋势。 2 0 0 0年的春芹菜 ,平均病株率达 35% ,严重田块全田发病 ,不仅降低了产量 ,而且不能食用 ,丧失了经济价值。分析芹菜病毒病在本地大流行的原因主要有三条 :一是菜地多年连作 ,土壤中有害菌逐年增加 ,加上?
Jurong city vegetable area celery grow all year round, resulting in celery virus disease has increased year by year trend. Spring celery in 2000, the average diseased rate of 35%, severe field all over the field incidence, not only reduce the yield, but also can not eat, lost economic value. Analysis of celery virus disease in the local pandemic for three main reasons: First, continuous vegetable for many years, the harmful bacteria in the soil increased year by year, plus?