Abstract
Leaf extract of A. arabica was found to inhibit PVY infectivity in vitro. The inhibitory property of the extract was sharply reduced on dilution. The inhibitory property was not reduced by desiccation of the extract for a period of 8 days and by a pH range of 4.0-10.0. The inhibitory principle was thermostable and dialysable. Crude tannins isolated from A. arabica extract were equally inhibitory. Catechol was found to be more inhibitory than quercetin and gallic acid, and it was considered the major inhibitory component.
