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菠菜生产中发生危害的主要病虫害有霜霉病、炭疽病和小菜蛾,其防治措施如下。1菠菜霜霉病1.1病状识别主要危害叶片,病斑初呈淡绿色小点,边缘不明显,扩大后呈不规则形,大小不一,直径3~17 mm,叶背病斑上产生白色霉层,后变灰色,病斑以植株下部向上扩展,干旱时病叶桔黄,湿度大时多
The main pests and diseases that occur in the production of spinach are downy mildew, anthracnose and diamondback moth. The prevention and cure measures are as follows. 1 spinach downy mildew 1.1 pathological identification of the main hazards of leaves, lesion initially showed a light green dots, the edge is not obvious, expanded irregularly shaped, the size of 3 ~ 17 mm in diameter, leaves back plaque white mold Layer, after the gray, lesion up to the lower part of the plant, the disease leaves orange yellow when dry, when the humidity is large