Wednesday, January 6, 2016: 1:30 PM
Mardi Gras Ballroom Salons A, B & C (New Orleans Marriott)
A study was conducted in 2014 and 2015 in two locations in each year. Locations included the Blackbelt research facility in Brooksville, MS and the R.R. Foil research facility in Starkville, MS. The study was conducted as a split plot factorial arrangement of treatments in a randomized complete block. Factor A included either deactivation or no deactivation of the 2,4-D analyte and Factor B consisted of a rate titration of 2,4-D at the rates of 16, 4, 1, 0.25, and 0.0625 fl.oz/A. At each rate for the deactivated treatment 110 g of iron sulfate hepta-hydrate and 130 ml of 30% hydrogen peroxide were added to a 0.5 gal solution to represent both the tank and the addition of the Fenton Reaction. Glyphosate was added to each treatment at a rate of 31.41 fl.oz/A. Analytical analysis on treatments were performed on High Performance Liquid Chromatography (HPLC).
Preliminary results from 2014 indicate a significant difference at each rate with respect to injury, plant height reduction, nodes above cracked boll (NABC) and yield reductions.