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病害一、芒果交链孢霉叶斑病(叶疫病)1.发生特点主要为害芒果的叶片。幼苗叶片、叶柄和茎上病斑圆形至不规则形,褐色至深褐色,稍隆起,轮纹不明显。叶柄受害叶片枯黄;茎部生圆形褐色病斑,有时纵裂,严重时幼苗枯死。2.防治方法 (1)农业防治:选用抗病砧木,如海南土杧、福建土杧和广西土
Disease First, the mango Alternaria leaf spot disease (leaf blight) 1. Occurred mainly harmful mango leaves. Seedling leaves, petioles and stems on the lesion from round to irregular, brown to dark brown, slightly elevated, round pattern is not obvious. Petiole affected leaves yellowish; stems round brown spot, sometimes longitudinal crack, severe seedling died. 2. Prevention and treatment methods (1) Agricultural control: the selection of disease-resistant rootstocks, such as Hainan Tuo, Fujian soil Tuo and Guangxi soil