【摘要】 砂仁叶枯病是严重为害砂仁的一种新病害。本文详述了该病害的4种症状类型:叶枯型、斑枯型、星斑型和叶鞘病斑,以前者为主。发病严重时造成大量死株。根据病原菌形态,培养性状、致病性及寄主范围,鉴定为围小丛壳菌Glomelrella cingulata(Stonem.)Spauld. et Schrenk.,分生孢子阶段为盘长孢状刺盘孢Colletotrichum gloeosporioides (Penz.) Sate.。病原菌的生长量和孢子量依培养条件和光照条件而异。寄主范围广,在参试的23科39种植物中,有9科15种植物发病。更多还原

【Abstract】 Amomum villosum is a popular medicinal plant in South China. Its production is seriously affected by newly described fungal leaf blight disease. Our study showed that there were 4 types of symptoms namely: leaf blhght, spot, star-mottling and sheath blight, with the first mentioned being the most common. The symptoms developed very rapidly and could extend downward/inward on the leaves 3 to 10mm daily under suitable conditions.The pathogen was identified as Glomerella cingulata (Stonem.) Spauld. et schrenk according to its morphology, cultural properies and host range; Conidia stage as Colletotrichum glozosporioides (Penz.) Sacc.Tie best medium for the growth of the fungus was PAD and the best medium for its sporulation was OMA. Continuous fluorescent light and natural light in laboratory treatments favoured its sporulation, and ultraviolet light inhibited sprulation.Among 39 plant species of 23 families inoculated, 15 species distributed over 9 families were infected by the fungus.更多还原