Molecular identification of begomovirus species of tomato yellow leaf curl disease from greenhouse in southern Xinjiang Molecular Diagnosis of Tomato Yellow Leaf Curl Disease in Jiangsu Province Identification and detection of mix-infection of whitefly-transmitted geminiviruses on Malvastrum coromandelianum in Miyi County of Sichuan Province Molecular Diagnosis of Tomato Yellow Leaf Curl Disease in Jiangsu Province