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茉莉花苗白绢病是由担子菌纲的一种真菌引起的病害,多发生在温暖潮湿的环境,尤以5—6月雷雨后容易发生。一般从近地面的茎杆基部开始发病,而后沿茎向上下蔓延扩展,形成白色绢丝状网膜,以后花苗的芽及叶片逐渐枯萎。随着病情的发展,患病花苗基部表面和土壤表面产生白色绵毛状物,这是病原的菌丝体。菌丝体逐渐形成许多白色小颗粒团,随后小颗粒团变为淡黄色至黄色,最后变成褐色的油菜籽大小的菌核,菌核散失或聚集成堆。此时患病花苗茎
Jasmine seedling Sclerotium is a disease caused by a fungus of the Basidiomycetes and occurs in a warm and humid environment, especially after May-June thunderstorm. Generally from the ground near the beginning of the incidence of stems, and then spread along the stem spread up and down, forming a white silk-like retinal, buds and leaves after the seedlings withered. As the disease progresses, the diseased diseased mycelium produces white fleece on the basal surface and on the soil surface. Mycelium gradually formed many small white particles, then the small particles into a light yellow to yellow, and finally become brown rapeseed sclerotium, sclerotium lost or gathered into piles. Sick flower seedlings at this time