Assessment of Nutrient Removal by Weeds as Affected by Different Nozzles Used in Drones for Post-emergence Herbicide Spraying in Transplanted Rice (Oryza sativa L.)

A field experiment was conducted at Military farm, ARI, Rajendranagar, Hyderabad during the kharif season of 2022 to evaluate the efficiency of different nozzles used in drone-based PoE herbicide spray on yield and yield components of transplanted rice. The design used in the study was carried out with the application of post emergence herbicide triafamone + ethoxysulfron using five different nozzles in drone i.e., XR11002VP, AIXR110015VS, DG 110015VS, DG95015EVS and SJ7A015VP and flat fan nozzle was used in knapsack sprayer. The lowest nutrient removal by weeds was recorded in hand weeding at 20 and 40 DAT, followed by the knapsack sprayer (flat fan nozzle) and drone treatments with SJ7A015VP, AIXR110015VS, and DG95015EVS nozzles. The highest nutrient removal occurred in unweeded check.