Evaluation of various fungicides for the management of late blight of potato (Phytophthora infestans)
2010
Ghazanfar, M.U. (University of Sargodha (Pakistan). Univ. Coll. of Agriculture) | Sahi, S.T. (University of Agriculture, Faisalabad (Pakistan). Dept. of Plant Pathology) | Wakil, W. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agricultural Entomology) | Iqbal, Z.
Potato cultivars grown in Pakistan have low levels of general resistance to late blight. Mostly the commercial potato farmers rely on fungicide applications for control of Phytophthora infestans, the causal agent of late blight. Field trials were conducted during the year 2008 at the Vegetable Research area of the Institute of Horticultural Sciences, University of Agriculture, Faisalabad, Pakistan to evaluate the effectiveness of three fungicides viz. Tazoline (Mancozeb + Metalaxy), Flint Max (Trifloxystrobin) and Kocide (Copper cxychloride) application on eight potato varieties. Application of fungicide treatments considerably reduced (P less than or equal to 0.05) late blight disease progress, with a corresponding decrease in disease index. The highest reduction in disease was achieved by applying Tazoline in the cultivar SH-103, followed by Kocide and least by Flint Max at an intervals of 07, 14, 21 and 28 days. Over all our results demonstrated that weekly sprays were mo
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