Vegetable soybean tolerance to flumioxazin-based treatments for waterhemp control is similar to grain-type soybean

Martin M. Williams, James L. Moody, Nicholas E. Hausman

Research output: Contribution to journalArticle

Abstract

Herbicides registered in vegetable soybean often fail to control waterhemp. The objective of this research was to quantify vegetable soybean tolerance to preemergence herbicides for early-season waterhemp control, including flumioxazin applied alone PRE or in mixture with chlorimuron, metribuzin, or pyroxasulfone at use rates in grain-type soybean. Crop tolerance to the herbicides was tested in field trials with 20 vegetable soybean cultivars and four grain-type cultivars through 4 wk after treatment (WAT). Flumioxazin-based treatments were equally safe, resulting in only minor, transitory crop response (<5% injury 2 WAT) and no effect on crop emergence or early season growth. Flumioxazin mixtures provided greater than 99% control of waterhemp 4 WAT, as evidenced by reduced weed density from 29.7 plants m-2 in the nontreated control to no waterhemp. Flumioxazin applied alone or in tank mixture with chlorimuron, metribuzin, or pyroxasulfone were as safe in vegetable soybean as previously reported in grain-type soybean. Registration of these products in vegetable soybean would provide the industry with additional options for managing waterhemp.

Original languageEnglish (US)
Pages (from-to)530-534
Number of pages5
JournalWeed Technology
Volume33
Issue number3
DOIs
StatePublished - Jun 1 2019
Externally publishedYes

Keywords

  • Crop injury
  • edamame
  • herbicide tolerance
  • minor crop
  • waterhemp

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science

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