The pathogen of tomato powdery mildew (Oidium neolycopersici Kiss) was simultaneously inoculated into four varieties during seedling,flowering and fruiting stag
[Objective] The study aimed to screen rational seedling raising date and seedling raising mode for plateau japonica rice,in order to reduce the effect of low te
After retrieving all papers with the theme of " apple ring rot" from 1994 to 2010,the article made a statistical analysis on locations,occurrence degree,regular