Abstract
Fenoxaprop effectively controls crabgrass (Digitariaspp.) in tall fescue (Festuca arundinacea Schreb.) turf. Antagonism with growth-regulating herbicides reduces potential to apply fenaxoprop in combination with many products for broadleaf weed control. Fluroxypyr is a pyridinoxy acid, broadleaf herbicide which may have potential for use in mixtures with fenoxaprop. Field experiments investigated fenoxaprop efficacy for smooth crabgrass (Digitaria ischaemum) control when applied alone and in combination with either fluroxypyr or a pre-packaged mixture of 2,4-D, dicamba, and mecoprop (MCPP) in tall fescue. Smooth crabgrass control from mixtures of fenoxaprop and fluroxypyr was similar to fenoxaprop alone. Smooth crabgrass control with mixtures of fenoxaprop with 2,4-D, plus dicamba, plus MCPP was nearly 50% less than fenoxaprop alone. White clover was completely controlled from mixtures of fenoxaprop and fluroxypyr which was similar to fenoxaprop applied with 2,4-D plus dicamba plus MCPP. Tall fescue injury was not detected on any rating date. Results suggest tank mixtures of fenoxaprop and fluroxypyr could provide effective control of smooth crabgrass and white clover in tall fescue.
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