Evaluation of Phyto-extracts for the Management of Alternaria Leaf Blight of Cluster Bean (Cyamopsidis tetragonoloba L.) Caused by Alternaria cucumerina

The present study was carried out to evaluate the effect of selected phyto-extracts for the management of alternaria leaf blight of cluster bean (Cyamopsidis tetragonoloba L.) caused by Alternaria cucumerina under field conditions. Three replications of cluster bean were planted in a randomized block design at the research plot of the Central Research Field, Department of Plant Pathology, SHUATS, Prayagraj during Zaid season of 2023. Ginger rhizome extract @ 10%, onion bulb extract @ 10%, eucalyptus leaf extract @ 10%, neem leaf extract @ 10%, garlic clove extract @ 10% and mancozeb 0.2% were applied as foliar spray. All the treatments were found significantly reduced the disease severity and increased the yield. Among all the treatments garlic clove extract @ 10% was recorded minimum disease intensity (29.63) and maximum yield (2.50 t/ha). Neem leaf extract @ 10% was recorded maximum cost benefit ratio (1: 1.80), as compared to treated mancozeb @ 0.2%(treated) and T0 control.