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甘蔗锈病是危害甘蔗叶片的主要病害,对在北海蔗区发现的甘蔗锈病病原进行了生物学特性研究。结果表明:该病菌夏孢子在黑暗条件和浓度为1.5%的葡萄糖条件下可促进夏孢子萌发;较适宜萌发温度范围为20～25℃,最适宜温度是25℃;在相对湿度为80%以上的条件下,夏孢子均能萌发,最适宜的萌发湿度是100%+水滴,萌发率达28.3%;在pH值4.0～11.1范围内,夏孢子均能萌发,最适合萌发的pH值是7.0;常规条件下,夏孢子的存活期最长达120d。防治对策着重在于选种抗病品种和栽培管理。
Sugarcane rust is the main disease which is harmful to sugarcane leaves. The biological characteristics of the sugarcane rust pathogen found in Beihai sugarcane field were studied. The results showed that the urticaria could promote the spore germination under the conditions of darkness and 1.5% glucose. The optimum temperature ranged from 20 ℃ to 25 ℃, and the optimum temperature was 25 ℃. When the relative humidity was above 80% , The most suitable germination humidity was 100% + water droplet and the germination rate reached 28.3%. In the range of pH 4.0-11.1, the spores could germinate and the optimum pH for germination was 7.0 Under normal conditions, the survival of the summer spores up to 120d. Prevention and control measures focus on the selection of resistant varieties and cultivation management.