Integrated management of Cercospora leaf spot of niger under field condition

P. MANIKCHANDRA; M. G. PALAKSHAPPA; R. H. YASHODA; S. G. PARAMESHWARAPPA

P. MANIKCHANDRA Department of Plant Pathology, College of Agriculture, Dharwad University of Agricultural Sciences, Dharwad - 580 005, India
M. G. PALAKSHAPPA Department of Plant Pathology, College of Agriculture, Dharwad University of Agricultural Sciences, Dharwad - 580 005, India
R. H. YASHODA Department of Plant Pathology, College of Agriculture, Dharwad University of Agricultural Sciences, Dharwad - 580 005, India
S. G. PARAMESHWARAPPA Department of Genetics and Plant Breeding, College of Agriculture, Dharwad University of Agricultural Sciences, Dharwad - 580 005, India

Keywords: Capitulum stage, Cercospora leaf spot, Per cent disease index, Pre-harvest stage

Abstract

Niger (Guizotia abyssinica Cass.) is an important minor oil seed crop grown in dry areas mostly in tribal and interior places as a lifeline of the tribal segment. Keeping in view the destructive nature of Cercospora leaf spot and its economic loss, the present investigation was conducted to evaluate the efficacy of fungicides and bioagents against Cercospora leaf spot of niger. Results revealed that all the treatments showed significant differences over the untreated check. Among the treatments evaluated for Cercospora leaf spot (Cercospora guizoticola) of niger, seed treatment with Trichoderma harzianum at 3g/kg followed by two sprays of carbendazim 50% WP at 0.1 per cent at 15 days interval during capitulum and pre-harvest stage recorded least per cent disease index (23.60), highest yield (8.90 q/ha) and seed test weight (4.85 g) which was found statistically on par with seed treatment with T.harzianum at 3g/kg followed by two sprays of (carbendazim 12% + mancozeb 63% WP) at 0.2 per cent at 15 days interval during capitulum and pre-harvest stage which recorded per cent disease index of 25.57, a yield of 8.10 q/ha and test weight of 4.76 g.