Economic Weed Control in High Plains Cotton
1990
Ethridge, Don E. | Ervin, R Terry | Hamilton, Clay M. | Keeling, J Wayne | Abernathy, John R.
This study considered factors that affect the weed control efficacy and profitability of several major herbicides used in cotton (Gossypium hirsutum L.) on the High Plains. The herbicides were Caparol¹ (N,N'-bis{1-methylethyl}-6-(methylthio)-1,3,5-triazine-2,4-diamine), Dual (2-chloro-N-{2-ethyl-6-methylphenyl}-N-{2-methoxy-1-methylethyl}acetamide), Prowl (N-{1-ethylpropyl}-3,4-dimethyl-2,6-dinitrobenzenamine), Sancap (6-{ethylthio}-N,N'bis-{1-methylethyl}-1,3,5-triazine-2,4-diamine), and Treflan (2,6-di-nitro-N,N-dipropyl-4-{trifluoromethyl}benzenamine). Results indicate that: (i) little additional yield is necessary to justify the use of herbicides; (ii) conditions present when herbicides are applied and crops planted affect herbicide effectiveness (generally, higher temperatures at application and planting dates result in better control and/or higher additional yields); and (iii) in some cases farmers should reduce the manufacturers' recommended rates of herbicide application to increase their profit.
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