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玉米弯孢霉叶斑病菌生长的温度范围是 9～ 38℃ ,p H值为 3～ 1 0 ,最适温度为 30℃ ,最适p H为 7;孢子产生的温度是 1 5～ 38℃ ,最适温度为 30℃ ,相对湿度为 98%以上。分生孢子萌发的温度为 7～ 41℃ ,p H值为 3～ 1 0 ,最适温度为 30～ 32℃ ,最适 p H为 6。孢子萌发不需要补充营养 ,饱和湿度下萌发率只有 7% ,而在水滴中可达 95%以上。光线对孢子萌发有抑制作用。以果糖作碳源 ,以甘氨酸作氮源菌丝生长最佳。以可溶性淀粉作碳源 ,以酪氨酸作氮源产孢最多。紫外光对孢子有杀伤作用 ,1 2 50 ppm的百菌清或 833ppm的福美双可完全抑制孢子萌发。菌丝体及孢子的致死温度分别为 52℃和 55℃。自然条件下 ,病菌孢子 3个月 ,病叶内菌丝体 1 2个月仍存活
The temperature range of growth of Curvularia lunata was 9 ~ 38 ℃, p H value was 3 ~ 10, the optimum temperature was 30 ℃, the optimum pH was 7; the spore temperature was 15 ~ 38 ℃ , The optimum temperature is 30 ℃, relative humidity is above 98%. Conidia germination temperature of 7 ~ 41 ℃, p H value of 3 ~ 1 0, the optimum temperature was 30 ~ 32 ℃, the optimum p H was 6. Spore germination does not need to add nutrition, germination rate of only 7% under saturated humidity, and up to 95% in water droplets. Light spores germination inhibition. Using fructose as carbon source and glycine as nitrogen source mycelium grew best. With soluble starch as carbon source, tyrosine as nitrogen source sporulation up. UV light has a killing effect on the spores, and 1 250 ppm chlorothalonil or 833 ppm thiram completely inhibits spore germination. The lethal temperatures of mycelia and spores were 52 ℃ and 55 ℃, respectively. Under natural conditions, the bacteria spores 3 months, diseased leaves mycelia still survive 12 months