Study on the Meteorological Factors and Wheat Stripe Rust and its Controlling Measures in Meishan City

Wheat stripe rust,which can be seen in various degrees every year,is one of the main diseases of wheat production in Sichuan Province.This disease always leads to the large-scale reduction of wheat production.Since the middle-and late 1990s,wheat stripe rust incident in high degree every year.Especially during the four years(1999-2002),Sichuan had been continuously bothered by this epidemical disease,and the annual loss was 3 million ton or so.The occurrence and prevailing of wheat stripe rust mainly depended on the three elements,the varieties of wheat,the amounts of bacteria,and meteorological conditions.At present,most of the wheat varieties are not resistant to wheat stripe rust,thus meteorological conditions are very important ecological factors for the occurrence,prevailing growth,and decline of wheat stripe rust.Therefore,it is very useful for the predicting,prevention,and controlling of stripe rust to study the relation between the occurrence and prevailing of wheat stripe rust and meteorological conditions,such as meteorological environment factors,climate division,and meteorological forecasting. In this paper,the datas about the severity and scope of stripe rust and the relevant meteorological conditions in Meishan City from 1994 to 2007 were collected.According to the datas,this paper analyzed the relationships between stripe rust of wheat and the average relative humidity during the average relative humidity,total sunshine hours,average temperature,total precipitation,rainy days,and determined the main meteorological factors of the stripe rust of wheat,confirmed the main meteorological factors,and made the prevention and treatment measures of stripe rust under different weather conditions.