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西葫芦又叫美州南瓜、搅瓜,是我国北方很受消费者欢迎的一种瓜类。近一、二年我县利用日光温室进行越冬茬和冬春茬生产,使整个冬季和春季都可有西葫芦供应,大大丰富了群众的菜蓝子。由于连年重茬种植,病害时有发生,严重影响西葫芦的产量,现将常发生的几种病害的识别与防治方法介绍如下。一、白粉病白粉病初发病时,叶上有圆形白色小粉斑,以后不断增多扩大,连成大粉斑,最终使全叶布满白粉。有时叶
Zucchini, also known as the United States pumpkin, stir melon, is a kind of melon popular with consumers in northern China. Nearly a year or two my county use of solar greenhouse for winter and spring stubble crop production, so that the entire winter and spring can have a supply of zucchini, greatly enriched the masses of vegetables. Due to perennial plantings, diseases have occurred, a serious impact on the production of zucchini, are now common occurrence of several disease identification and prevention methods are described below. First, powdery mildew The first incidence of powdery mildew, the leaves are round white small speckles, after the increase continued to expand, even into large plaque, and eventually the whole leaf covered with white powder. Sometimes leaves