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茶扦插苗根腐性苗枯病在广西各地苗圃普遍发生,造成死苗。经鉴定,Pythium spinosum Sawada是该病重要病原菌之一。生理测定表明,该菌生长温度范围7～35℃,最适温度25～30℃,高湿度下生长良好,最适pH7.0～8.2,CA基质有利于繁殖体形成。对光照无特异需求,紫外灯照射生长减缓。这是刺腐霉对茶扦插苗致病性的首次报道。
Tea cuttings root rot of seedling blight around the nursery occurred in various parts of Guangxi, resulting in dead seedlings. It has been identified that Pythium spinosum Sawada is one of the important pathogens of this disease. Physiological measurements showed that the growth temperature of the strain ranged from 7 to 35 ° C and the optimum temperature ranged from 25 to 30 ° C. The growth of the strain was well under high humidity and the optimal pH was 7.0 to 8.2. The CA substrate was favorable for the formation of propagules. No specific needs of the light, UV light irradiation slowed down growth. This is the first report of the pathogenicity of tea seedlings to Pythium sp.