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随着保护地黄瓜种植面积的不断扩大,连年重茬,病菌累积导致黄瓜病害日趋严重。一些原来不太重要的病害也相继发生,且大有上升为主要病害的趋势。如黄瓜细菌性角斑病、灰霉病等。目前唐山市保护地黄瓜病害危害严重的主要有:黄瓜霜霉病、炭疽病、枯萎病,细菌性角斑病和灰霉病等。而且常常几种病害交替或混合发生,增加了防治难度,因病害造成黄瓜减产可达30～50％。为此我所经五年研究,制定了黄瓜主要病害的综防技术,其防效达89.2％以上,现介绍如下:
With the cucumber planting area continues to expand, year after year stubble, the accumulation of bacteria lead to increasingly serious cucumber diseases. Some previously unimportant diseases also occurred one after the other, with the trend of rising to major diseases. Such as cucumber bacterial angular leaf disease, gray mold and so on. At present, Tangshan City, protected cucumber diseases are the main hazards: cucumber downy mildew, anthracnose, Fusarium wilt, bacterial angular leaf spot and gray mold disease. And often several diseases occur alternately or mixed, increasing the difficulty of prevention and treatment, cucumber yield reduction due to disease up to 30 to 50%. To this end, after five years of research, I developed the comprehensive prevention technology of cucumber main diseases, its control efficiency reached 89.2%, which is introduced as follows: