Abstract:
Alternaria alternata is one of the main diseases in tobacco producing. It reduced tobacco yield, and had a strong impact on quality of tobacco. In order to reduce the morbidity degree of
Alternaria alternata and improve the yield and quality of tobacco, the split plot experiment design was used. The main plot were tobacco-rice rotation, tobacco-corn rotation and tobacco-tobacco continuous cropping, the split plot were wiping off and leave over the bottom leaves. The control effect for
Alternaria alternata with different rotation method and combine with wiping off and leave over the botton leaves was explored. The results showed: the best rotation method was tobacco-rice rotation with wiping off the bottom leaves, the second was tobacco-rice with leave over the bottom leaves, the third was tobacco-corn rotation with wipping off the bottom leaves. The worst was tobacco-tobacco continuous corpping with leave over the bottom leaves. For this reason, the planting pattern was tobacco-rice with wiping off the bottom three leaves in Qidong. It was inappropriate for tobacco-tobacco continuous cropping.