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黄瓜白粉病和番茄叶霉病是西安市温室生产中的两大病害,传播蔓延极快,发病后仅十多天便迅速扩及整个温室,致使叶片早期染病干枯,提前拔蔓,造成减产,同时它又是夏季大田黄瓜、番茄严重发病的主要侵染来源。今春,我们使用陕西省化工设计研究院出品的50%托布津甲基可湿性粉(简称4431)和50%托布津乙基可湿性粉(简称4432)在郊区进行防治试验,效果很好。一,黄瓜白粉病防治试验:在
Cucumber powdery mildew and tomato leaf mold is the two major diseases in greenhouse production in Xi’an. The spread of the disease is very fast. After the onset of disease, it rapidly spread to the entire greenhouse, resulting in early leaf drying and early pull, resulting in reduced production, At the same time, it is the main source of infestation of cucumber and tomato in the summer field. This spring, we use the chemical design and Research Institute of Shaanxi Province produced 50% Topaz methyl wettable powder (referred to as 4431) and 50% Topazin ethyl wettable powder (4432) in the suburbs for prevention and treatment work, the effect is very good. First, cucumber powdery mildew prevention and control test: in