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烟草花叶病是陕西烟草生产的主要病害,自七十年代起日趋严重。常年发病率都在70—80%,流行年减产达50%以上,严重影响我省烟草优质丰产。1977—79年,我们进行了烟草花叶病种群鉴定研究,目的在于查清烟草花叶病在我省发生类型,为进一步研究优势种群的流行规律和防治提供理论依据。一、毒源标样的来源、分离和鉴定 1.室内人工接种鉴定: 鉴定的155个毒源标样均采自陕西新、老烟区的田间病株,包括关中东部的合阳县,关中中部的咸阳市、兴平县、彬县,关中西部的宝鸡县、凤翔县、岐山县、眉县、武功县和陕西北部的洛川县。
Tobacco mosaic disease is the main disease of tobacco production in Shaanxi Province, which has become increasingly serious since the 1970s. Perennial incidence rates are 70-80%, the popular annual reduction of more than 50%, seriously affecting the quality of tobacco in our province high yield. In 1977-79, we conducted a study on the identification of tobacco mosaic disease in order to find out the occurrence type of tobacco mosaic disease in our province and provide a theoretical basis for further studying the prevalence and control of dominant populations. First, the origin of the source sample, isolation and identification 1. Indoor artificial inoculation identification: Identification of the 155 samples of the poisonous source were collected from Shaanxi Province, the old tobacco area of the field disease strains, including Guanzhong eastern Heyang County, Guanzhong Central Xianyang City, Xingping County, Binxian, Guanzhong western Baoji County, Fengxiang County, Qishan County, Meixian County, Wugong County and northern Shaanxi Luochuan County.