陕西烟草蚜传病毒病防治技术研究

在烟草炼苗期采用杀蚜剂、病毒抑制剂、纱网罩烟苗 ,田间生长期采用杀蚜剂、病毒抑制剂和不同移栽期防治烟草蚜传病毒病。结果表明 ,杀蚜剂防治烟草蚜传病毒病效果较差 ,病毒抑制剂效果一般为 6 0 %左右 ;随移栽期推迟 ,烟草蚜传病毒病发病显著减轻。炼苗期烟草苗床是传毒介体有翅蚜着落的靶子中心 ,是烟田蚜传病毒病的主要初侵染源 ,为防治烟草蚜传病毒病的关键时期。用纱网罩烟苗能阻止传毒介体与烟草接触交叉传染 ,结合适时喷施病毒抑制剂 ,能有效防治烟草蚜传病毒病发生 ,同时能有效保护环境和介体天敌

The Study on the Control Technique of Tobacco Virus Spread by Aphids in Shaanxi

s: During the tobacco hardening period, the tobacco were treated by virusicide, aphidicide and screen covering. The tobacco were sprayed by virusicide, aphidicide in the field and using different transplanting time in order to control the tobacco virus spread by aphids. The results showed that aphidicide had low effect on tobacco virus spread by aphids, virusicide effect were about 60%;the occurrence degree and index of disease were lower when the transplanting time was put off. During the tobacco hardening period, bed of tobacco seedling was the falling target of alate aphids, and was the main resource of tobacco virus spread by aphids. For controlling tobacco virus spread by aphids, if tobacco seedling was covered by screen covering, after transplanting Bingdudi sprayed, this can prevented virus vector from contacting tobacco seedling, from spreading virus, and had good effect to control tobacco virus spread by aphids.It could aslo protection environment and aphids natural enemy.