Efficacy of four triazole fungicides in the control of leaf spots and rust of groundnut
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Authors
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K.B. JADEJA, D.M. NANDOLIA, I.U. DHRUJ and R.R. KHANDAR
Department of Plant Pathology, College of Agriculture, Gujarat Agricultural University, Junagadh 362 001
Keywords:
Early and late leaf spots, rust, groundnut, triazole fungicidesAbstract
Field trials were conducted at Junagadh, Gujarat, India, in 1995-97 to assess the efficacy of difenoconazole and propiconazole at 0.0125% w/v, hexaconazole at 0.025% and epoxiconazole at 0.00625%, compared with carbendazim at 0.025% and mancozeb at0.2%, applied as foliar sprays at 30, 45 and 60 days post-emergence for control of early and late leaf spot (Cercospora arachidicola [Mycosphaerella arachidis] and Phaeoisariopsis personata [Mycosphaerella berkeleyi], respectively) and rust (Puccinia arachidis) in groundnuts. Results indicated that all the triazole fungicides reduced both rust and leaf spots, while carbendazim was effective against leaf spots and mancozeb against rust. Best control was achieved with hexaconazole and difenoconazole, andthese treatments also gave best pod and fodder yields. The hexaconazole-treated plots gave a 71% higher pod yield and an 87% higher fodder yield than an untreated control. The highest net return of Rs 9793/ha was also achieved with this treatment.
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