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一、危害症状发病植株地上部表现生长缓慢似缺氮肥状,植株较矮小,发育不良,果实小或畸形。当天气干燥或中午前后棚室温度升高时,病株有明显萎蔫现象。地下根部形成大小和形状不同的瘤状根结,主要危害植株根部,以侧根和须根最易受害。一般地块常造成作物产量损失10%～30%,严重时达70%以上,甚至整株死亡。其综合防治措施如下:
First, the symptoms of harm The above-ground parts of the performance of slow growth of nitrogen-like fertilizer-like plants shorter, dysplasia, small fruit or deformity. When the weather is dry or greenhouse temperature around noon, the diseased plants have obvious wilting phenomenon. Underground root formation of different size and shape of the tumor-like root knot, the main hazard plant roots to the most vulnerable to lateral roots and fibrous roots. In general, plots often result in 10% to 30% loss of crop yield, more than 70% in severe cases, and even death of entire plants. Its comprehensive prevention and treatment measures are as follows: