In recent years,grape brown spot happens in different districts in Lanzhou, and affects the yield of grape. The disease in Lanzhou was studied from 1998 to 2000. The results show that it starts to happen from the middle ten days of June,happening most seriously from July to August. The disease percentage is 8%～36%,and the disease index 3%～17.8%. Based on the specimens collected in different districts in Lanzhou and the cultural, pathogenicity, morphological characteristics of the pathogen, it is considered that the pathogen should be Pseudocercospora vitis (Lev.) Speg.
NETL
NSTL
维普
万方数据
