济南百亩园园林绿化有限公司 

A, control of Botrytis cinerea

该病症状复杂，有叶斑病、溃疡病、腐烂病、猝倒等。病症明显，一般在潮湿条件下出现显著的灰色霉层。叶片、花瓣、嫩茎、幼苗均可发病。病原为灰葡萄孢霉，该病菌寄主范围广。早春（3-5月）、冬季温室内温度低、湿度大引起。

The symptoms of the disease are complex, leaf spot disease, ulcer disease, rot, cataplexy etc.. Symptoms significantly, generally gray mold layer significantly under wet conditions. Leaves, stems, petals, seedling disease. Pathogen Botrytis cinerea, wide host range of the pathogen. In early spring and winter (3-5 months), low temperature, high humidity inside greenhouse by.

防治方有：育苗地种植密度不宜过大，要适当通风，降低湿度，增加株行间光照；避免过多的叶面上保持干燥无水；或喷洒甲基托布津、苯来特、代森锰锌等。

Prevention: seedling planting density should not be too large, should be appropriate to reduce the humidity, ventilation, increased the plant row light; avoid too much to keep dry leaf; or spraying thiophanate methyl, benomyl, mancozeb etc..