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为了探索烟草不同生育阶段对CMV的侵染反应、为防治烟草黄瓜花叶病提供理论依据。1984～1986年对不同生育阶段的烟草品种“Speight G28”、“Nc89”、“中烟15”以CMV接种。观察其侵染和发病情况及对各个器官和产量的影响、试验结果指出:3个品种从大十字期至现蕾期对CMV的侵染无抵抗能力,但各生育阶段的耐病性存在明显差异。SpeightG28,中烟15自大十字期至50天属于感病阶段、50天后属于耐病阶段。“Nc89”前40天属于感病阶段。在感病阶段中、前两个品种又有两个高峰期、分别为从大十字期至第10天和第40天左右、“Nc89”为第10天和第40天。第一次高峰尤为严重、病情指数可达80以上、产量降低35%左右、潜育期短13～15天、推迟现蕾期30～50天、个别植株不能现蕾。耐病阶段病情指数低于40以下,产量降低10%左右。植株的感、耐现象与体内的蛋白质、总糖的含量有密切的关系。
In order to explore the different stages of tobacco infection of CMV response to provide a theoretical basis for the prevention and treatment of tobacco cucumber mosaic disease. From 1984 to 1986, the tobacco cultivars “Speight G28”, “Nc89” and “Zhongyan 15” were inoculated with CMV at different growth stages. The results showed that the three cultivars had no resistance to CMV infection from the cross to the bud stage, but there was a significant difference in the disease resistance at each growth stage . SpeightG28, tobacco 15 from the cross to 50 days are susceptible stage, 50 days after the disease-resistant stage. The first 40 days of “Nc89” belong to the susceptible stage. In the susceptible phase, the first two cultivars had another two peaks, ranging from the Great Cross to the 10th and the 40th days, respectively. The “Nc89” was the 10th and the 40th days. The first peak is particularly serious, the disease index up to 80 or more, yield decreased by 35%, the incubation period is short 13 to 15 days, postponed the budding period of 30 to 50 days, individual plants can not bud. Disease resistance stage disease index below 40, the yield decreased by about 10%. Plant sense of resistance phenomenon and the body of protein, total sugar content is closely related.