Evaluation of Fungicides against Leaf Blotch of Turmeric Caused by Taphrina maculans Butler

Evaluation of Fungicides against Leaf Blotch of Turmeric Caused by Taphrina maculans Butler

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A field experiment was conducted in the first fortnight of July 2008, 2009 and 2010 at Horticultural Research Station, Jagtial, and in 2010-2011 at Turmeric Research Station, Kammarpally, to evaluate various fungicides against leaf blotch of turmeric.Treatments included the fungicides Propiconazole (0.1%), here Hexaconazole (0.1%), Tricyclazole (0.

1%) and Carbendazim + Mancozeb (0.1%) for rhizome treatment (dipping) and for foliar spray at 45 and 90 days after planting (DAP); and foliar application alone at 45 and 90 DAP.Among the treatments, rhizome treatment with Carbendazim + Mancozeb (0.1%) gave the best germination (90.

52%); Rhizome treatment followed by foliar application of Carbendazim + Mancozeb (0.1%) at 45 and 90 DAP significantly reduced disease incidence of turmeric leaf blotch (16.13%) and enhanced fresh-rhizome yield (18.30t ha-1) compared to other fungicide applications.

High cost-benefit ratio was achieved with rhizome treatment, followed by foliar application of Carbendazim + Mancozeb at 45 here and 90 DAP (1:1.92).