Fungicidal Control Of Cercospora Leafspots Of Groundnuts In Uganda

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Date
1975/1976
Authors
Mukiibi, J.
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Abstract
Six fungicides controlled leafspots of groundnuts caused by Cercospora personata and C.arachidieola reducing 'the proportion of affected leaflets and defoliation. Benomyl was the most effemive fungicide fol1owed by Organotin, Manoozeb, dithiocarbamate copper mixture (Brunomax), Difolatan, and Captan. Benomyl controlled C. personata more than it did C. arachidicola but Difolatan was Jess effective against C. personata than C. araehidieola. Control of the diseases was accompanied by significant increases in yield of good quality nuts by up to 54 per cent but the extent to which the application of a particular fungicide increased yield did not always correspond to the extent to which it controlled the diseases. The best yields were obtained by spraying with Organotin which was followed by Benomyl, Difoliatan, Mancozeb, Brunomax and Captan in decreasing order of effectiveness. The yield response of a particular cultivar to fungicidal treatment depended on the extent to which the cultivar was susceptible to Cercospora.
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East African Agricultural And Forestry Journal, 41, pp. 95-105
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