XVI International Botanical Congess

A glycoprotein isolated from the roots of Boerhaavia diffusa plants had exhibited broad spectrum and high antiviral activity against major forms of sap transmissible viruses. It was revealed that infection and spread of tomato leaf enation mosaic virus (a vector borne virus), in tomatoes by while fly (Bemisia tabaci Gen.) was considerably reduced if healthy seedlings of tomato were sprayed with aquous preparations of B.D. glycoprotein 24 hrs to 172 hrs prior to feeding with viruliferous vectors. Whereas, seven disease symptoms appeared with 15 days on healthy plants (control) of the same virus, not sprayed with such substances.