Mefenpyr-diethyl as a safener for haloxyfop-methyl in bahiagrass

Abstract Mefenpyr-diethyl is a foliar-acting safener of the pyrazoline chemical group, and after its absorption, metabolization detoxification herbicides occur in treated plants. Studies have demonstrated protective effect this for herbicide fenoxaprop-P-ethyl grass. Thus, work aimed to evaluate whether tank mixture mefenpyr-diethyl has response haloxyfop-methyl non-perennial bahiagrass. The experiment had completely randomized design was carried out greenhouse, using five replications with 10x2 factorial scheme ten doses (0.00, 0.24, 0.49, 0.97, 1.95, 3.90, 7.79, 15.59, 31.28, 62.35 g a.i. ha-1) presence or absence (50 ha-1). Phytotoxicity electron transport rate (ETR) were evaluated at 7, 14, 21, 28 days application (DAA), addition plant height dry biomass DAA. In general, phytotoxicity increased due higher levels haloxyfop-methyl. mefenpyr-diethyl, turn, provided lower phytotoxicity, as well reductions ETR, height, when compared untreated These results show action on low