ISHS Acta Horticulturae 529: III International Pineapple Symposium
SULFENTRAZONE FOR PREPLANT WEED CONTROL IN PINEAPPLE |
| Author: | Chesed M. Sison |
| Keywords: | sulfentrazone, preplanting application, weed control, pineapple |
| Abstract:
The effects of sulfentrazone on weed control, crop injury, herbicide residues, and yield of pineapple were determined in the Del Monte Philippines, Inc. plantation in Bukidnon, Philippines. Sulfentrazone, formulated as a suspension concentrate containing 480 g ai L-1, was applied preplant at 0, 0.125, 0.25, 0.5 and 1.0 kg ai ha-1. At a second location it was applied at 0.5 kg ai ha-1 alone or in combination with either diuron or bromacil at 1.8 kg ai ha-1. The number of weeds per 36-m2 plot was significantly reduced for 6 months with sulfentrazone application at 0.5 and 1.0 kg ai ha-1. Sedges were completely controlled starting at 0.25 kg ai ha-1. Plant crop yield was significantly higher at 0.5 kg ai ha-1 versus the untreated control but lower versus the standard plantation practice of bromacil + diuron at 3.6 + 1.8 kg ai ha-1. Tank-mixing sulfentrazone with diuron or bromacil further reduced weed population compared to sulfentrazone alone but was still significantly inferior to the standard plantation practice for overall weed control. No phytotoxicity due to sulfentrazone was observed and there were no detectable residues in the flesh and shell of plant crop fruit at 0.5 and 1.0 kg ai ha-1. | |
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