灰霉病是温棚蔬菜栽培中易发生和流行的主要病害之—。它发生早、蔓延快、为害重、损失大，严重影响着温棚蔬菜生产。据调查，灰霉病一旦发生，轻者减产30％～40％，严重者可造成损失80％以上。一、症状特点叶片发病，初期出现浅白色小点，继而形成水渍状大型灰褐色病斑。潮湿 Botrytis cinerea greenhouse cultivation is prone to occur and the prevalence of the major diseases -. It occurs early, spread fast, heavy damage, big loss, a serious impact on greenhouse production of vegetables. According to the survey, in the event of gray mold disease, light output reduction of 30% to 40%, severe cases can cause more than 80% loss. First, the symptoms of the onset of leaves, the initial emergence of shallow white dots, and then form a large watery stain-like brown spots. Wet