The Investigation of Over-summer Status for Wheat Strip Rust

The investigation of over-summer status for wheat strip rust was taken in Hezhang County from 2005 to 2008 since it was found could be over-summer in Guji Township in September 2004.The results showed that the altitude of areas for wheat strip rust safe over-summer was 1 700 m,and the over-summer areas were 5 000 hm2.There was difference of lowest altitude in different years,and the lowest altitude could reach 1 600 m when the years with hot summer and cold temperatures.