Effect of Nozzle Selection on Weed Control and Yield in Mississippi Cotton

Field studies were conducted at two locations in Mississippi to understand the effect of nozzle type and herbicide application timing on weed control in cotton. The study also compared applications made with an eight nozzle tractor sprayer compared to a four nozzle backpack sprayer. Herbicide applications were made at four different timings: preemergence (PRE), early post (EPost), early-mid post (EMpost), and late post (LPost) corresponding to the preemergent, 2-3 leaf, 5-6 leaf, and match head square stages respectively. Treatments included a standard herbicide treatment applied at each growth stage, with the nozzle type as the variable by each timing.