论文部分内容阅读
一、常见病害1.芹菜软腐病该病多发生在芹菜移栽缓苗期或缓苗后的生长初期。一般先从柔嫩多汁的叶柄基部开始发病。发病初期,病斑淡褐色,水渍状,纺锤形或不规则形,稍凹陷,迅速扩展后内部组织呈黑褐色腐烂,有恶臭,最后仅残留表皮。2.芹菜心腐病病原菌主要随病残体在土壤越冬。定植时,病原菌从芹菜伤口侵入引起发病。4℃～36℃均能发病,最适温度27℃～30℃。病
First, the common disease 1. Celery soft rot disease occurs in celery transplant Huanmiao or Huanmiao after the initial growth. Generally start from the soft and juicy petiole base onset. Early onset, light brown spots, water-like, spindle-shaped or irregular shape, slightly depressed, rapid expansion of the internal organization showed dark brown decay, odor, and finally only the residual epidermis. 2. Celery heart rot pathogen mainly with the disease in the soil overwintering. When colonization, pathogens invade the celery wounds causing the disease. 4 ℃ ~ 36 ℃ can onset, the optimum temperature of 27 ℃ ~ 30 ℃. disease