Effect of plant extracts on early blight of tomato (Lycopersicon esculentum L.)

Abstract

An experiment was conducted to evaluate the effect of fungicide (mancozeb) and botanicals against early blight of tomato caused by Alternaria solani at the experimental field of Plant Pathology, Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad, during Rabi season (2016-2017). Six treatments including control with three replication were taken up using RBD. In field experiments, the highest reduction of disease intensity was achieved by applying garlic bulb extract and datura leaf extract at 5% concentration (23.17% and 24.86% respectively) as compared to treated check (mancozeb) at 0.2% concentration (21.51%) and untreated check control (29.12%). Maximum yield was reported in treated plant of garlic bulb extract (170.16 q/ha) as compared to treated (mancozeb) (250.33 q/ha) and untreated (Control) (85.33q/ha) checks. All the treatments significantly reduced the early blight disease as well as increased the plant height and yield of tomato in comparison to infected control under field conditions.