|SABALLOS, ANA - Oak Ridge Institute For Science And Education (ORISE)|
|PEACHEY, R ED - Oregon State University|
Submitted to: Weed Technology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/16/2023
Publication Date: 2/28/2023
Citation: Williams II, M.M., Saballos, A., Peachey, R. 2023. Snap bean response to pyroxasulfone in a diversity panel. Weed Technology. 37(1):84-88. https://doi.org/10.1017/wet.2023.12.
Interpretive Summary: Herbicide pyroxasulfone would be valuable in suppressing certain weed species in snap bean; however, snap bean tolerance to the herbicide is poorly documented. This research showed that a large number of snap bean entries are sensitive to pyroxasulfone at a rate needed to provide effective weed suppression. A few entries highly tolerant to the herbicide were identified. Large cultivar variability in response to pyroxasulfone means the herbicide is unlikely to help snap bean growers control weeds selectively in the crop.
Technical Abstract: If available for use on snap bean, pyroxasulfone would provide valuable preemergence suppression of certain weed species that currently contaminate the crop post-harvest. The extent to which snap bean tolerates pyroxasulfone is poorly documented. The objective of this research was to quantify the extent to which pyroxasulfone tolerance exists in a large collection of snap bean cultivars. A snap bean diversity panel of 277 entries was screened for tolerance to sulfentrazone at a rate of 420 g ai ha-1 in a field trial in 2019 and 2020 near Urbana, IL. Snap bean cultivars exhibited variation in tolerance to pyroxasulfone. While a handful of cultivars were tolerant across variable environments, most cultivars were sensitive in the year that had greater water supply after planting. Low estimates of broad sense heritability reflect a large influence of the environment on seedling emergence and growth. With a few exceptions, currently the margin of crop safety across diverse germplasm is insufficient for registration of pyroxasulfone on snap bean.