烟草赤星病流行动态与不同打顶时期的相关性

The Correlation between Epidemic Dynamics of Tobacco Brown Spot Disease and Different Topping Periods

通过对保山市隆阳烟区进行调查,发现烟草赤星病季节流行动态呈logistic曲线增长。烤烟打顶是调节烟叶营养水平的重要手段,不同打顶时期与各处理间的F测验结果表明,各处理间的差异极显著,建议将不同打顶时期作为引发烟草赤星病季节流行的一个重要因子考虑,将其纳入病害的预测预报式中。

Through the investigation of Longyang tobacco planting area in Baoshan City, it found that the seasonal epidemic dynamics of tobacco brown spot disease growing with a logistic curve. Topping for tobacco plant is an important way to regulate the nutrition level of tobacco leaves. Through conducted the F-tests to the tobacco plants at different topping periods and with each treatment, the results showed that there an extremely significant difference between each treatment. Therefore, it suggested that the different topping periods should taken as an important factor for triggering the seasonal epidemic of tobacco brown spot, and it should be brought into the disease-forecasting formula.