Management of leaf spot of turmeric (Curcuma longa L.) incited by Colletotrichum capsici through fungicides

Abstract

An experiment was conducted at Kammarpally (Andhra Pradesh) to evaluate the efficacy of four fungicides viz., Propiconazole (0.1%), Hexaconazole (0.1%), Tricyclazole (0.1%) and Carbendazim + Mancozeb (0.1%) for the management of leaf spot disease (Colletotrichum capsici) of turmeric (Curcuma longa L.). Rhizome treatment with Carbendazim + Mancozeb (0.1%) gave the best results for germination (90.52%) and rhizome treatment and foliar application of Propiconazole (0.1%) at 45 and 90 days after planting (DAP) were significantly superior in reducing the disease index (20.01%) of leaf spot disease and increasing the fresh rhizome yield (17.13 t ha-1) as compared to other fungicides tested. The high cost – benefit ratio was achieved in rhizome treatment and foliar application of Carbendazim + Mancozeb at 45 and 90 DAP (1:1.92).