Location: Global Change and Photosynthesis Research
2019 Annual Report
Objectives
Objective 1: Develop control measures for weeds in vegetables, fruits, and specialty crops. Objective 2: Determine herbicide residues in harvested product.
Approach
Herbicides alone or in combination with cultural and mechanical methods will be
evaluated under field conditions and percent weed control by species, crop injury
and crop yield will be determined. Plant samples will be collected for determination of herbicide residues.
Progress Report
New control measures for common waterhemp in edamame have been identified. Reports on these flumioxazin-based treatments have been shared with the IR-4 project, herbicide manufacturers, and the vegetable industry. A peer-reviewed journal article has been published and label expansion of these products to edamame is being considered.
Non-chemical approaches to weed management in edamame also have been identified. Individual tactics include seed size, crop planting depth, and cultivar selection. Two peer-reviewed journal articles have been published and future studies integrating a suite of non-chemical tactics are under development.
Scientists are currently assembling a large collection of snap bean lines for 1) quantifying tolerance to herbicides disparately needed to manage multiple herbicide resistant (MHR) weeds, including waterhemp, 2) identifying candidate genes conferring herbicide tolerance, and 3) identifying QTLs important to crop competitiveness with MHR weeds.
Accomplishments
Review Publications
Crawford, L.E., Williams, M.M. II. 2019. Planting depth and seed size affect edamame emergence individually. HortScience. 54(1):92-94. https://doi.org/10.21273/HORTSCI13631-18.
Williams, M.M. II, Moody, J.L., Hausman, N.E. 2019. Vegetable soybean tolerance to flumioxazin-based treatments for waterhemp control is similar to grain-type soybean. Weed Technology. 33:530-534. https://doi.org/10.1017/wet.2019.15.
Crawford, L., Williams, M.M. II. 2018. Role of edamame (Glycine max) seed size in early-season crop-weed interactions. Weed Science. 66:746-751. https://doi.org/10.1017/wsc.2018.46.
