Susceptibility of Merremia cissoides, Neonotonia wightii and Stizolobium aterrimum to the amicarbazone, imazapic and sulfentrazone herbicides.
Three experiments were developed with the goal to evaluate the susceptibility of Merremia cissoides, Neonotonia wightii and Stizolobium aterrimum to the amicarbazone, imazapic and sulfentrazone herbicides, by means of rate-response curves. The experiments were installed in clay soil, where eight doses of each herbicide were applied, in pre-emergency. The used doses were: 8D, 4D, 2D, D, 1/2D, 1/4D, 1/8D, and check plots without application; whereas D is the recommended dose of amicarbazone (1200 g ha-1), imazapic (147 g ha-1) or sulfentrazone (800 g ha-1). For M. cissoides and N. wightii species, the three tested herbicides demonstrated effective control up to the 60 days, in the recommended doses. For the S. aterrimum species, only amicarbazone herbicide was effective, in the recommended dose. Control levels ensure these three herbicides as control options in pre-emergence for the M. cissoides and N. wightii species and only the amicarbazone herbicide, as control option for S. aterrimum.