Coffee Board of Kenya Monthly Bulletins March 1972

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Date
1972
Authors
Cannell, G. R.
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Coffee Board of Kenya
Abstract
At ruiru, an 'early' coffee fruit crop is harvested from June to September followed by a 'late' crop from October to January.One 3 or 8 sprays of 10 ppm or 100 ppm of gibberellic acid (GA3)were applied to trees in the field between April and August 1968 to lay the initiation of flower buds giving rise to the early crop in 1969, and so concentrate the 1969 crop in the latter part of the year. Only 3 and 8 sprays of 100 ppm GA3 significantly changed the frilling pattern. Trees receiving 8 applications of 100 ppm GA3 extended their branches about three times more rapidly between June and September 1968 than untreated trees, formed flower buds less rapidly,and yielded 77 % less 'ea rly' crop and 91 % more 'late' crop in 1969. [
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