Nozzle Selection and Adjuvant Impact on the Efficacy of Glyphosate and PPO-Inhibiting Herbicide Tank-Mixtures

PPO-inhibiting herbicides in combination with glyphosate for postemergence applications is a common approach to manage glyphosate- and ALS-inhibitor-resistant weeds. PPO-inhibitors can reduce translocation when applied tank-mixtures, but adjuvants may be used overcome this effect. Additionally, optimal droplet size affected by tank-mixtures of different it crucial herbicide efficacy. Field greenhouse studies were conducted investigate the impact nozzle selection on weed control interactions applying (fomesafen or lactofen) alone tank-mixture five species using six types. Ultra-coarse droplets just as effective medium regardless spray solution, have lower likelihood off-target movement. Tank-mixtures consistently antagonistic lambsquarters, horseweed, Palmer amaranth. Only fomesafen was kochia whereas synergistic observed plus lactofen COC, DRA + NIS. Separate are advisable herbicide- weed-specific situations avoid antagonism, which necessary achieve optimum maintain effectiveness PPO-inhibitors. Future research should continue look at these important across wide range species.