烟草丛顶病防治研究与应用

10年的研究确认,在云南发生的烟草丛枝类病害是烟草丛顶病,病原物是烟草丛顶病毒(TBTV)和烟草脉扭病毒(TVDV).蚜虫传播是田间最主要的传染途径.采用"治虫防病"措施防丛顶病效果达61%;"以治(避)虫防病为主体,综合防治烟草丛顶病技术"的防效为86.9%,20hm2中心防治示范样板防效为77.2%.1999～2002年大面积推广应用综合防治技术,烟草丛顶病控制在1%以下,效果十分明显.

Study on the control strategy of tobacco bushy top disease

Tobacco bushy top disease is a newly reported disease in China with severe damage to tobacco plants. The typical symptoms are stunting and bushy top. Tobacco bushy top disease caused considerable yield and economic loss. In 1996 the direct economic loss was over 100 million Yuan (RMB) in western Yunnan Province. Tobacco bushy top disease are caused by tobacco bushy top virus and tobacco vein distorting virus. Aphid-transmission is the key means of disease spread. The management strategy "controlling tobacco bushy top disease via controlling vector aphids" is effective with a control effect of 61%. The strategy "controlling tobacco bushy top disease via controlling vector aphids combined with integrated pest management" is more effective with a control effect of 86. 9%. In a demonstrating tobacco plantation of 20 hm2, 873 kg of tobacco leaf production with a total price of 11,318. 85 Yuan (RMB) per hm2 were recovered in contrast with those plantations without control measures. In 1999-2002, the disease control strategy was extended resulting an effective control of tobacco bushy top disease with an incidence lower than 1%.