Abstract
A survey was conducted to record the occurrence of whitefly-transmitted gemini viruses (WTGs) in four districts of Tamil Nadu. Various plant and weed species infected by WTGs were collected during the survey, and preliminary studies conducted revealed that the bitter gourd plant exhibiting the yellow mosaic symptom was new and it was devastating for bitter gourd in all the places where the survey was conducted. This virus was characterized as bitter gourd yellow mosaic virus (BGYMV). Cassava (Monihot esculenta) and three weed species viz., Acalypha indica L., Croton sparsiflorus, Bail, and Malvastrum coromandelianum (L.) Gracke, respectively, were found to be the hosts of BGYMV. BGYMV was purified from the infected bitter gourd plants and it was found that the purified particles contained a single major protein of an estimated molecular weight of 35 KDa.
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