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油菜菌核的子囊孢子释放后,首先侵入花器,随后带茵花瓣谢落在叶片上,引起叶片发病,病叶萎蔫沾附在茎秆上,又引起茎秆发病,使输导组织受损,水分、养分输导受阻 ,造成减产。如果此时摘叶,可中断病菌的侵染途径,保护茎秆不受侵害。它具有如下优越性。 (1)简便省药、保护天敌。(2)防病效果明显。据陕西省汉中地区植保植检站试验,摘叶后对菌核病的防治效果可达73.7%,而花期喷药的防治效果为54.1%,轮作换
After the release of ascospores of rape mycell nucleus, the first invasion of flower, and then with the petal Xie Xie fall on the leaves, causing the leaves of disease, the diseased leaves wilt stained on the stalk, but also cause the incidence of stalks, the guide tissue damage, Water, nutrient transport blocked, resulting in reduced production. If you pick leaves at this time, can interrupt the pathogen infection, to protect the stem from infringement. It has the following advantages. (1) Simple medicine, protect natural enemies. (2) Prevention effect is obvious. According to the plant protection and phytosanitary station test in Hanzhong, Shaanxi Province, the control effect on sclerotinia after picking leaves was 73.7%, while that of flowering spraying was 54.1%