| The field plot experiments were conducted to investigate the effects of transplanting date, tobacco and potato intercropping on main disease occurrence of tobacco such as tobacco bacterial wilt, tobacco black shank, PVY, tobacco brown spot, TMV and CMV. The results showed that moving up or postponing the transplanting date of tobacco had great influence on the occurrences of tobacco bacterial wilt, tobacco black shank and PVY. There were aggravating trends of the three diseases with the postponement of tobacco transplanting date. Tobacco intercropping with potato havd remarkable effect on main disease occurrence of tobacco. Tobacco/potato intercropping could aggravate occurrence of tobacco bacterial wilt, PVY, tobacco brown spot, TMV and CMV. |
