Primary Study on Spatial Distribution Pattern of Chinese Cabbage Downy Mildew and Soft Rot
白菜霜霉病及软腐病空间分布型研究

The spatial distribution of Chinese cabbage downy mildew and soft rot was studied.The results showed that the distribution pattern of Chinese cabbage downy mildew was aggregation in 15 fields of which the number of lesion per plant was less than 20.And with the increase of lesion number,the aggregation degree decreased gradually.To the 4 fields of which the number of lesion per plant was more than 3 000, the distribution pattern was evenness.The distribution pattern of soft rot was mostly a random in those ...