The Varieties and Molecular Identification of Viral Diseases in Sugarcane Cultivating in Hainan Province

The occurrence situation of viral diseases in sugarcane was investigated in 24 towns,8 counties in Hainan Province.And two main types of viral diseases occurred in this region,including sugarcane yellow leaf disease caused by Sugarcane yellow-leaf virus and sugarcane mosaic disease caused by Sorghum mosaic virus.Sugarcane yellow-leaf disease was more wide spread than sugarcane mosaic disease.Its detection rate reached 75%.With status of the viral pathogen infection,it is emergent to plant disease-free seedlings to prevent these diseases in Hainan and even nationwide sugarcane production regions.