The Coffee Board of Kenya Monthly Bulletin December 1967

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1967
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It is apparent, as we are (Drawing towards the time for the pre-long-rains spraying of coffee, that some form of assessment of spraying machines is necessary. The use of fluorescent racer allows a quick assessment of the spraying efficiency of machines. Although flourescent tracers have been referred to as qualitative tools(l) Long Ashton Research Station has shown a clear-cut association between the chemical and the tracer when sprayed in combination on plant surfaces(2)' This means, therefore,that wherever fluorescence is visible under ultraviolet light, the chemical is also present.
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Bulletin, pp. 429-480
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