Mississippi State University
Ferguson, Jason Connor
Reynolds, Daniel B.
Tseng, Te-Ming (Paul)
Date of Degree
Original embargo terms
Graduate Thesis - Open Access
Plant and Soil Sciences (Weed Science)
Master of Science
College of Agriculture and Life Sciences
Department of Plant and Soil Sciences
Field studies were conducted to test three application methods for applying antagonistic herbicide combinations: 1) tank mix (TMX), 2) mix-in-line (MIL), and 3) separate boom (SPB). Sethoxydim applied with bentazon, glyphosate applied with dicamba or 2,4-D, and clethodim applied with dicamba or 2,4-D had higher efficacy when applied using the SPB method. Antagonism of all the herbicide combinations above was observed when applied using the TMX and MIL methods. In some cases, antagonism was avoided when using the SPB method. Three application methods tested in greenhouse studies were 1) TMX, 2) synthetic auxin applied first (AAF), and 3) synthetic auxin applied second (AAS). The AAS application method resulted in higher weed control than the TMX and AAF methods. Analysis done through liquid chromatography mass spectrometry supported the greenhouse results with higher rates of glyphosate detected with the AAS method.
Merritt, Luke H., "Reduced herbicide antagonism through novel spray application techniques" (2019). Theses and Dissertations. 3746.