Prospects of selecting genotypes of Coffea arabica L. which do not require tonic sprays of fungicide for increased leaf retention and yield
The initial effect of tonic fungicide sprays on arabica coffee in Kenya is a 2-3 month delay fall and this causes a marked increase in yield even when the trees are not noticeably diseased. In yield experiments carried out to investigate leaf abscission responses to ethephon of fungicide-sprayed and unsprayed genotypes, fungicide-sprayed leaves showed a significantly lower abscission response. There were marked genotype differences in thresholds for leaf abscission, and the locally selected cv. SL 28 was among the most resistant to ethephon treatment. It was concluded, however, that tonic sprays will continue to be effective in Kenya in increasing yields, even after the introduction of new disease-resistant cvs
Saved in:
| Main Authors: | , |
|---|---|
| Format: | biblioteca |
| Published: |
1978
|
| Subjects: | COFFEA ARABICA, FUNGICIDAS, ABSCISION FOLIAR, KENIA, |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|