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小麦白粉病菌形成子囊孢子的必要条件之一是闭囊壳保持湿润。子囊孢子形成的温度范围为1～27℃,最适为11～15℃,紫外光、散光及黑暗无影响;酸碱度范围为pH3.2～9.2,以pH5.0～7.0最适。子囊孢子萌发的温度范围为1～36℃,最适为11～20℃;湿度范围为0～100%,以在水面及100%湿度时最高;黑暗及散光无影响;酸碱度范围为pH2.2～12.4,以pH5.0～8.0为最适。温度愈高、湿度愈大,病叶上的闭囊壳寿命则愈短。
One of the necessary conditions for the formation of Ascospores of Powdery mildew is that the capsule is kept moist. Ascospores formed in the temperature range of 1 ~ 27 ℃, the most suitable for 11 ~ 15 ℃, UV, astigmatism and darkness no effect; pH range of pH3.2 ~ 9.2, pH5.0 ~ 7.0 optimum. Ascospore germination temperature range of 1 ~ 36 ℃, the most suitable for 11 ~ 20 ℃; humidity range of 0 ~ 100% to the highest water and 100% humidity; no effect of dark and astigmatism; pH range of pH2.2 ~ 12.4, with pH5.0 ~ 8.0 as the most suitable. The higher the temperature, the greater the humidity, the diseased leaves on the life of the closed shell is shorter.