Effects of tobacco-Artemisia carvifolia intercropping on controlling tobacco diseases and evaluation of field interaction

Tobacco-Artemisia carvifolia intercropping treatments for prevention and control effect of TMV （Tobacco mosaic virus），TLCV（Tobacco leaf curl virus）and tobacco black shank were determined in this experiment，and the structure of insect community in farmland was analyzed，intercropping treatment effect on the growth of tobacco plant was evaluated. The results showed that intercropping can effectively reduce the tobacco mosaic，tobacco leaf curl disease and tobacco black shank，reduce the Myzus persicae Sulzer and Bemisia tabaci’s population density. On the other hand. Compared with the control，the photosynthetic rate of tobacco plants increased under the intercropping mode of Artemisia carvifolia，and there was no significant difference in chlorophyll content and basic agronomic characters，the tobacco plants grew normaly.