论文部分内容阅读
韭菜灰霉病又称白色斑点病,是我县冬春塑料棚栽韭菜的毁灭性病害,轻则叶片产生斑点,品质、价格下降,重则全叶腐烂造成失收。 症状:灰霉病主要危害韭菜叶片,先从叶尖开始发病,逐步向下发展。最初产生淡黄色小斑点,以后扩大为梭形或长椭圆形病斑,变成灰白色,表面稍隆起。病斑的大小多数为2.5～3.5×0.5～0.7毫米。天气干燥时,病情发展慢,病症不明显。空气潮湿时,病斑表面产生灰色霉层,病情发展快,病斑连片,全叶腐烂。
Leek botrytis, also known as white spot disease, is my county winter plastic shed planted chives devastating disease, ranging from leaves produce spots, quality, price decline, weight is the whole leaf decay caused by loss. Symptoms: Botrytis cinerea major chives leaves, starting from the tip of the disease, the gradual downward development. Initially produce a small yellowish spots, later expanded to fusiform or oblong lesions, become gray, slightly bulging surface. The majority of the lesion size 2.5 ~ 3.5 × 0.5 ~ 0.7 mm. When the weather is dry, the disease develops slowly, the disease is not obvious. When the air is wet, gray mildew occurs on the surface of the lesion, and the disease develops rapidly. The lesion is contiguous and the whole leaf is decayed.