Influence of surfactant‐humectant adjuvants on physical properties, droplet size, and efficacy of glufosinate formulations

Glufosinate efficacy is inconsistent among weed species and under environmental conditions that favor rapid droplet drying. Surfactant-humectant adjuvants could maximize glufosinate by increasing wetting penetration into the leaf surface while decreasing evaporation rate (ER). However, there a lack of information in literature about interaction surfactant-humectants with glufosinate. The objective this study was to investigate influence surfactant-humectant on physical properties, size, two formulations. Laboratory, greenhouse, field studies were conducted at Pesticide Application Technology Laboratory University Nebraska-Lincoln. Treatment design 2 × 5 factorial formulations combined five adjuvant treatments plus an untreated control. Density viscosity solutions mostly increased addition adjuvants. dynamic tension (dST), static contact angle (sCA), (ER) varied formulation, adjuvant, relative humidity (RH). Under greenhouse conditions, improvement adding mainly observed for Interline solutions. biomass reduction up 19 35% common lambsquarters (Chenopodium album L.) kochia [Bassia scoparia (L.) A. J. Scott], respectively. Also, some presented null or antagonistic herbicide efficacy. No increase control, reduction, mortality horseweed (Erigeron canadensis Palmer amaranth (Amaranthus palmeri S. Watson) use conditions. Herbicide-adjuvant-plant-environment complex. Thus, may not