烟草病毒病综合防治技术研究

Colligated control techniques of tobacco virus diseases

在种子消毒,培育无毒烟苗,大田配套防治技术,化学药剂防治和研制中草药制剂等方面,开展了烟草病毒病综合防治技术研究。结果表明,采用5%的肥皂水消毒种子、罩40目尼龙网育苗、5%石灰水消毒育苗土壤、育苗土壤消毒的营养杯直播育苗或直播塑料托盘浅水育苗、苗期和大田前期喷施中药剂除病毒9803、5%石灰水穴内浇施、沟土高培免中耕等综防技术,发病期推迟30d,相对防效80%左右,上等烟提高4.3-11.3个百分点,产量增加250-300kg/hm2,产值增加3000元/hm2左右。

Seed disinfection, producing virus-free tobacco seedling, colligated techniques of virosis prevention and cure at field growth stage, control of virosis by chemicals and developing Chinese traditional medicine preparation were applied in this investigation. The result showed that disinfected tobacco seed by 5% suds, nursed tobacco seedling on seedbed covered with 40 mesh nylon web, disinfected seedling soil with 5% limewater, seeded directly into cups filled with disinfected nutrient soil or seeded directly into plastic pan in wading pool, sprayed Chinese traditional medicine preparation 'Chu Bing Du 9803' on seedling stage and early field growing stage, watered 5% limewater into the planting hole, earth up highly and no cultivation, the onset date of tobacco virus disease was defered 30 days, relative control effect was about 80%, the ratio of high-grade tobacco leaves increased by 4.3 to 11.3 percent, the yield increased 250-300 kg/ha and the output value increased about 3000 yuan/ha.