一黄麻苗枯病(Alteruaria Sp.)黄麻苗枯病是黄麻苗期最常见和为害严重的病害,是保苗工作中的大敌,也是当年增产的第一关。浙江麻区在黄麻子苗出土,子叶展开后即出现病害,到第三片真叶发生后才不再为害。这时期大致在4月下旬到6月上旬。病苗初发生时,在子叶边缘发生暗绿色的病斑,逐渐转为褐色,到子叶的大部分被侵染即行脱落。 A jute seedling blight (Alteruaria Sp.) Jaundice is the most common and serious damage in jute seedling stage disease, seedling is the enemy in the work, but also yield the first pass. Zhejiang Ma area excavated in the jute seedlings, cotyledons unfolded disease that occurs after the third true leaves no longer harmful. This period is generally in late April to early June. At the beginning of disease seedling, the dark green spots appeared on the edge of cotyledons and gradually turned brown. Most of the cotyledons were infested and fell off.