Response of non–bromoxynil-resistant cotton to reduced rates of bromoxynil
| Autor: | Robert G. Downer, Donnie K. Miller, E. Merritt Holman, B. Roger Leonard, Steve T. Kelly |
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| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Weed Science. 51:786-791 |
| ISSN: | 1550-2759 0043-1745 |
| DOI: | 10.1614/p2002-100 |
| Popis: | Field research was conducted for 2 yr to determine the effects of reduced rates of bromoxynil on growth and yield of non–bromoxynil-resistant cotton. Rates of 4.5, 9, 17, 35, 70, and 140 g ha−1, representing 0.008, 0.016, 0.031, 0.063, 0.125, and 0.25 fractions of the maximum labeled use rate per application (560 g ha−1), were applied to cotton at the two-, five-, or nine-node growth stage. Visual injury was reduced because application timing was delayed from two- to five-node stage in all experiments and from five- to nine-node stage in two of three experiments. Although negatively affected at all application timings, plant height reduction response decreased with increasing cotton maturity. Plant dry weight was most negatively affected after application at the two-node stage. Bromoxynil application, based on the node above white flower number, did not result in maturity delays but did promote earlier maturity when applied at 140 g ha−1 to two- and five-node stage cotton in one of the three expe... |
| Databáze: | OpenAIRE |
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