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大麦黄花叶病是近几年在上海、浙江、江苏发现的一种新病害,特别是73年以来,江、浙、沪部分地区大面积流行,郊区今年发病面积达17万亩,成为郊区当前大麦高产稳产的主要病害。现将我们的调查情况介绍如下:一、症状和危害1.病害症状:麦苗分蘖初期,在未展开的圆锥状心叶上出现与叶脉平行的短线条状
Barley yellow mosaic disease is a new disease discovered in Shanghai, Zhejiang and Jiangsu in recent years. Especially since 73 years, large area epidemic has occurred in some areas of Jiangsu, Zhejiang and Shanghai. The outbreak area of the suburbs has reached 17 million mu this year, Barley high yield and stability of the main diseases. Now we investigate the situation are as follows: I. Symptoms and Harm 1. Symptoms of disease: wheat seedlings early tillering, in the unexpanded cone-shaped heart lobes parallel with the short streaks