Phyto-extracts for Managing Alternaria Leaf Spot on Mung Bean

Abstract

The present study was investigated to evaluate the effect of selected phyto-extracts for the management of Alternaria leaf spot on mung bean caused by Alternaria alternata (Fr.) Keissler, under field conditions. Three replications of mung bean were planted in a randomized block design. At the research plot of the Central Research Field, Department of Plant Pathology, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj during Zaid season of 2023. The effect of neem leaf extract, onion bulb extract, ginger rhizome extract, garlic bulb extract, turmeric rhizome extract and Mancozeb were compared and tested the plant height (cm), pod length (cm), disease intensity (%) and B:C ratio recorded at 45, 60 and 75 DAS interval. The effect of foliar spray of T4–garlic bulb extract @ 10% was found the best for managing Alternaria leaf spot of mung bean under field conditions as minimum disease intensity (34.4%), maximum plant height (65.4cm), pod length significantly increased (8.4cm) and highest B:C ratio (1:2.05). Followed by minimum disease intensity (35.5%), plant height (60.9cm), pod length (7.8 cm) and highest B:C ratio (1:1.97) was recorded in T1–neem leaf extract @ 10% followed by T5–turmeric rhizome extract @ 10% when compared to (Treated check) T6–Mancozeb @ 0.2% and (Untreated check) T0–control. Overall results revealed that T4–garlic bulb extract @10% is significantly effective against A. alternata (Fr.) Kessler.