Effect of Neem Oil in Combination with Propiconazole and Organic Amendments on Anthracnose (Colletotrichum lindemuthianum) of Cowpea (Vigna unguiculata L.)

Abstract

The cowpea (Vigna unguiculata) is an annual herbaceous legume from the genus Vigna. Anthracnoses (Colletotrichum lindemuthianum) is a serious disease in cowpea growing areas and occurs as pre-harvest as well as post-harvest brown to black spots appear on the leaves. Neem oil at different concentrations (0.5%, 1%,1.5%, and 2%) along with Propiconazole were tested @ 0.1% in vivo during Kharif 2023 for their efficacy against disease incidence, plant growth and yield parameters of Cowpea at the Central Research Field of the Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj. The results of the present investigation revealed that it significantly reduced the disease incidence. Among the treatments the minimum disease intensity (%) at 75 DAS was recorded in T5 – Neem oil (2 ml/L) + Propiconazole 25 EC (0.1%) + VC@10gm/kg +SMC@10gm/kg (Foliar spray) was found to be significantly most effective treatment against Anthracnose (Colletotrichum lindemuthianum) on Cowpea and recorded minimum disease intensity (%) at 30, 45, 60 and 75 DAS, maximum plant height (cm), maximum number of branches, maximum yield (t/ha) and highest B:C ratio. The findings of the present experiment are limited to one crop season under Prayagraj agro-climatic conditions, as such to validate the present findings; more such experiments should be carried out in the future.