Evaluation of plant extracts for control of Alternaria leaf spot of Vicia faba.

摘要

The efficacy of the leaf extracts of Azadirachta indica, Cannabis sativa, Aegle marmelos and Achyranthus aspera in controlling leaf spot in faba beans caused by Alternaria alternata was determined in laboratory and field experiments conducted in Bihar, India in 2001. Azadirachta indica recorded the highest growth inhibition of the fungi under laboratory conditions. Under field conditions, the crude leaf extract of Azadirachta indica recorded the highest control of the pathogen. Crop yield was highest (40.3 q/ha) with spraying of C. sativa leaf extracts.