丰都县烟草赤星病发生与流行的气象因子分析

目的]有效防治烟草赤星病在丰都县的发生和流行.方法]采用田间系统调查的方法,对烟草赤星病的发生规律进行了初步研究.结果]烟草赤星病主要发生在打顶期至采收期,发生程度较重;中温、高湿以及连续阴雨天气容易造成流行.结论]在烤烟生长后期,气温、降雨量、降雨日数和日照时数是赤星病发生流行的主要原因.

Study on Meteorological Factor Analysis of Tobacco Alternaria alternata Occurrence and Epidemic in Fengdu County

Objective] The aim was to efficiently prevent occurrence and epidemic of tobacco Alternaria alternata in Fengdu.Method] The occurrence regularity of tobacco Alternaria alternata by using the methods of field system investigation was investigated.Result] The results showed that tobacco Alternaria alternata generally occurred from topping period to picking period with severe occurrence.The medium temperature,high humidity and the long lasting rainy days were beneficial for the occurrence of tobacco Alternaria alternata.Conclusion] In later stage of growth,temperature,rainfall,rainfall days and sunlight time was the main reasons for tobacco Alternada alternate occurrence and epidemic.