移栽期和烟草马铃薯套作对烟草主要病害的影响

通过田间小区试验,研究了移栽期、烟草马铃薯套作对烟草青枯病、黑胫病、马铃薯Y病毒病(PVY)、赤星病、烟草普通花叶病毒病(TMV)、烟草黄瓜花叶病毒病(CMV)等主要病害的影响.结果表明,移栽期提前和推迟对烟草青枯病、黑胫病、马铃薯Y病毒病发生均有较大影响,随着移栽期的推迟病情呈加重趋势；烟草马铃薯套作对烟草主要病害的发生均有显著影响,套作处理能加重青枯病、马铃薯Y病毒病、TMV、CMV的发生及危害.

Effects of transplanting date and tobacco intercropping with potato on main disease occurrence of tobacco

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.