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灰霉病是冬季温室球茎茴香生产的一种主要病害,它多从衰老坏死或结水的叶片、叶柄开始侵染,引起枝叶坏死腐烂,球茎染病后,初呈水浸状灰绿色至灰褐色坏死斑,在病部表面产生霉层。由于温室灰霉病具有较强的侵染性,严重影响着温室球茎茴香的产量和品质。一、发病规律灰霉病菌以菌核或分生孢子在病残体或土壤表层内越冬。主要通过气流传播,也可以通过未腐熟的沤肥或通过浇水扩散,病菌的适宜温度在22～31℃,保护地气温20℃左右,连续相对湿度90%以上,植株叶面有水滴,管理造成伤口,生长衰弱时容易染病。
Botrytis cinerea is a major disease of greenhouse fennel production in winter. It mostly starts to infiltrate from leaves and petioles of aged necrotic or watery, causing necrosis and decay of branches and leaves. Necrotic spots, mold surface in the mold layer. Due to the strong infectivity of greenhouse gray mold, the yield and quality of bulb fennel in greenhouse were seriously affected. First, the incidence of Botrytis cinerea bacteria or conidia in the sick or soil surface winter. Mainly through the air flow, but also through the non-maturity of fertilizer or watering through the spread of the appropriate bacteria temperature of 22 ~ 31 ℃, the protective ground temperature of about 20 ℃, the relative humidity of 90% or more plant leaves with water droplets, management caused Wound, easy to get sick when growing weak.