Abstract: Epidemic hemorrhagic fever was first discovered in 1950s in the Great Xingan Mountains.Based on animal eeologlcal study and epidemiological analysis,it is determined that stripedfield mouse(Apodemus agrarius Pallas)is the host for the disease,which severely competewith house mice species.Striped field mouse inhabits mostly in residential areas and mig-rates seasonally.After extensive killing of the striped field mouse,the disease has been effectively controlled since 1960.But in Chaocha forestry farm and Daomuda region,there stillexists natural sources of disease,which reqiures attention from different levels.

Key words: NO, ABA, Stomatal movement, Signaling