烟草病害是制约烟草产量、品质的重要因素。仅河南省烟田每年因病害造成的产量损失达10％—15％、经济损失达3000万元以上。所以,及时防治病害是烟草生产的关键环节。就河南烟区而言,危害较严重的烟草病害主要有四种:花叶病、黑胫病、赤星病、根结线虫病。 Tobacco disease is an important factor restricting tobacco production and quality. Only tobacco production in Henan Province each year due to disease caused by the loss of up to 10% -15%, economic losses of 30 million yuan or more. Therefore, the timely prevention and treatment of diseases is the key to tobacco production. In terms of Henan tobacco area, there are mainly four kinds of tobacco diseases which are seriously endangered: mosaic disease, black shank disease, brown spot disease and root knot nematode disease.