Compatibility of fenoxaprop with selected herbicides for the control of rice weeds, with special reference to barnyard grass.
1989
Hassan S.M. | McGregor J.T. | Smith R.J. | Khodayari J.R.K. | Talbert R.E.
Fenoxaprop is a new experimental herbicide that controls grass weeds in rice, but fails to control broadleaf weeds. It gives no residual control. Three greenhouse experiments were conducted at the University of Arkansas [USA] to evaluate the efficacy of fenoxaprop when applied tank-mixed with selected herbicides. Fenoxaprop (0.04, 0.08, and 0.17 kg/ha) was applied alone and in tank-mixture with bentazon (0.42 kg/ha), aciflourfen (0.08 kg/ha), thiobencarb (1.7 kg/ha), lactofen (0.11 kg/ha), or bromoxynil (0.14 kg/ha) to barnyard grass Echinochloa crus-galli L. Beauv. All treatments with fenoxaprop alone and in bank-mixtures reduced the fresh weight of barnyard grass, as compared with the untreated check. Fenoxaprop alone reduced fresh weight by 95-98, 71-91, and 32-63% when applied at the 2-3 leaf, 4-5 leaf, and tillering stages, respectively. When applied alone at 2-3 leaf stage, thiobencarb gave 80% reduction in fresh weight, but the percentage of control decreased with advanced growth stage of barnyard grass. All broadleaf weed herbicides applied alone gave unsatisfactory growth reduction of barnyard grass. With tank-mixtures, fresh weight was reduced by 85-98, 36-94, and 29-83% (average of all rates and herbicide treatments) when applied at the 2-3 leaf, 4-5 leaf, and tillering stages, respectively. Efficacy of the tank-mixtures on barnyard grass was in the order of thiobencarb>bromoxynil>aciflourfen>lactofen>bentazon.
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