Evaluation of Fungicides on management of Dieback and Fruit Rot Disease Causing Alternaria tenuissima (Kunze ex Pers.) WILTSHIRE of Chilli

Abstract

Field experiments were conducted for two consecutive Kharif seasons of 2014 and 2015 at vegetable research centre, Pantnagar, Uttarakhand, to study the efficacy of different fungicides chlorothalonil, propineb, azoxystrobin, Kresoxym methyl, difenoconazole, tebuconazole, hexaconazole, flutriafol, azoxystobin + flutriafol and metiram + pyraclostrobin against dieback disease of chilli caused by Alternaria tenuissima. All the tested fungicides were found to be significantly superior over check in reducing incidence and severity of early dieback caused by A. tenuissima. The minimum mean disease incidence and severity was recorded in Azoxystrobin 125 SC + Flutriafol 125 SC @ 14.28+14.28 g a.i ha-1 11.83 and 10.67 followed by Azoxystrobin 125 SC + Flutriafol 125 SC @ 12.5 + 12.5 g a.i.ha-1 14.92 and 14.0 over control 52.78 and 40.67 at terminal spray respectively.The minimum fruit rot and maximum total yield was found in Azoxystrobin 125 SC + Flutriafol 125 SC @ 14.28+14.28 g a.i ha-1 29.32% and 37.01 q/ha followed by Azoxystrobin 125 SC + Flutriafol 125 SC @ 12.5 + 12.5 g a.i.ha-1 34.10% and 35.40q/ha at final picking respectively.Highest marketable yield (25.51q/ha) was obtained in treatment Azoxystrobin 125 SC + Flutriafol 125 SC @ (14.28+14.28) g a.i ha-1 followed by Azoxystrobin 125 SC + Flutriafol 125 SC @ 12.5 + 12.5 g a.i.ha-1 (24.61q/ha) and Azoxystrobin 23 SC @ 125 g a.i. ha-1 (23.36 q/ha) with 70.70, 69.63 and 68.01 per cent avoidable loss, respectively.