Nevin C. Lawrence
Date of this Version
Miranda JWA (2021) Interference and management of Palmer amaranth (Amaranthus palmeri) in dry edible bean. M.Sc. thesis. Lincoln, NE: University of Nebraska-Lincoln. 130 p
Palmer amaranth is a recent arrival in Western Nebraska, and it has become prevalent in the last five years. There is a lack of literature on both management and interference of Palmer amaranth in dry edible beans. Research is necessary to evaluate the impact and biology of Palmer amaranth within dry edible beans and to evaluate potential herbicide programs in dry edible bean to control ALS−inhibitor−resistant Palmer amaranth for the future sustainability of this crop production. It is critically important that research conducted in Western Nebraska provide information on the impact of Palmer amaranth in dry edible bean and ALS−inhibitor−resistant Palmer amaranth management in dry edible bean as this weed species is not present yet in most of the dry edible bean−producing states and their counties. Chapter 1 outlines dry edible bean production in the United States and Nebraska, the most common weed species in dry edible bean production systems in the United States, Palmer amaranth biology and management in cropping systems, the lack of effective POST herbicides in Nebraska to control ALS−inhibitor−resistant Palmer amaranth, and the alternative options to supplement the lack of POST herbicides to control ALS−inhibitor−resistant Palmer amaranth in dry edible bean. Chapter 2 evaluates the impact of season−long Palmer amaranth interference at varying fixed densities in dry edible bean. Chapter 2 also evaluates the potential seed production of Palmer amaranth when competing with dry edible beans. Chapter 3 evaluates dimethenamid−P in a sequential PRE fb (followed by) POST program to control ALS−inhibitor−resistant Palmer amaranth in dry edible bean. Dimethenamid−P in a sequential PRE fb POST program is the only current effective option to control ALS−inhibitor−resistant Palmer amaranth in dry edible bean. Lastly, Chapter 4 evaluates the potential of Group 15 herbicides for use in dry edible beans and increase the herbicide toolbox of growers to control ALS−inhibitor−resistant Palmer amaranth.
Advisor: Nevin C. Lawrence