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通过对苗床不同措施的避蚜效果及移栽后病毒病发生情况的对比,研究避蚜时期及设施与烟草病毒病发生的关系。研究结果表明:40目防虫网避蚜效果最佳,悬挂塑料条和苗床四周铺薄膜也有较好的避蚜效果,薄膜揭开取走及常规对照的避蚜效果较差。网室栽培条件下,病毒病发生情况与移栽烟苗所用避蚜设施的防效明显相关,避蚜效果越好,发病越轻;大田条件下,不同来源的烟苗发病情况几乎没有差异,地膜栽培相对裸地栽培有较好的避蚜防病作用,防效在50%左右。河南省许昌地区烟草病毒病的传播以蚜传为主,从移栽到6月27日期间的蚜虫传毒起着决定性作用。
The relationship between aphid-eradicating stages and facilities and the occurrence of tobacco virus disease was studied by comparing the effects of aphid-controlling aphids and the virus-borne diseases after transplanting. The results showed that the 40-mesh insect-repellent net had the best effect of aphid-killing, and the plastic film strips and the seedbed around it had good effect of avoiding aphids. The film-taking and conventional control of aphids were less effective. Under the culture conditions of cymbidium, the incidence of virus diseases was significantly related to the control effect of aphid-resistant aphids used in transplanting tobacco seedlings, the better the aphid-controlling effect was, the less the incidence was. Under field conditions, there were almost no differences in the incidence of tobacco seedlings from different sources, Relatively bare film mulching cultivation has a better protection against aphids disease prevention, control effect is about 50%. The spread of tobacco virus disease in Xuchang, Henan Province, is dominated by aphids, which plays a decisive role in the transmission of aphids from transplanting to June 27.