ISHS Acta Horticulturae 153: IX African Symposium on Horticultural Crops
PROGRESS ON A FUNGICIDE EVALUATION SYSTEM FOR THE SEYCHELLES |
| Author: | W.R. Sitterley |
| Abstract:
A dynamic fungicide evaluation system has been established with a series of plantings every six weeks. Test crops are from plant families surveyed as having the most serious diseases. The flexible plan is designed to provide such information as chemical efficacy, phytoxicity, scheduling and rates throughout the year under various moisture regimes on red clay and sandy soils. Initial testing indicates that for tomatoes grown on red clay, during periods of high rainfall, use of Bravo 500 at 2.2 kg ha-1 on a three day schedule is most effective in controlling Corynespora cassiicola. A seven day schedule of Bravo 500 is also economically effective. For cucumber, the most economically effective control of C. cassiicola and of Erysiphe cichoracearum is again provided by Bravo 500 at 2.2 kg ha-1 on a seven day schedule. The three day schedules of Bravo and Difolatan (at 2.2 kg ha-1) are also effective. A second test with tomato as a host is being used to investigate fungicide combinations and scheduling during dry weather periods. This dynamic living computer may be used throughout the entire year, every year, to develop pathological information beneficial to Seychelles producers. | |
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