The Coffee Board of kenya Monthly Bulletin November 1981

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Date
1981
Authors
Coffee Board Of Kenya
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Abstract
Tank mixtures of 0.3% Delan 75% WP,with different Copper formulations,namely Kocide 101 0.7%, Copper oxychloride 0.7%,Perenox 0.7% and freshly prepared Bordeaux mixture (1.0%),sprayed at 4-week intervals were as effective as 2-weekly sprays of coppers alone in the control of bacterial blight,coffee berry disease and in yield response.Four-weekly sprays of Delan (0.3%)were effective against bacterial blight but they were inferior to 2-weekly copper sprays and 4-weekly sprays of copper/Delan mixtures.Plots sprayed with freshly prepared Bordeaux mixture (1.0%) gave lower yield than either plots sprayed 2-weekly with 50% copper formulations alone or plots sprayed with tank mixtures of copper + Delan at 4-week intervals.
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Bulletin, 46 (544), pp. 313-340
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