Herbicide Options for Weedy Perennial Mallow Species in Western Texas
ISSN 2158-9429
Volume 16, Issue 2 - December 2023
Editor: Linda Chalker-Scott
Abstract
Various herbicide applications were evaluated for control of Abuliton fruticosum (Texas Indian mallow) and Sphaeralcea angustifolia (narrow-leaf globemallow) under field conditions at two different locations in Western Texas in 2023. Both trials were arranged as randomized complete block designs with three replications, and treatments included glyphosate, dicamba, 2,4-D, various combinations of these, and an untreated check (UTC), as well as picloram, triclopyr, fluroxypyr, and picloram + 2,4-D at the Indian mallow (non-cropland) site. Findings across both sites highlight a complete lack of control with glyphosate and glyphosate + dicamba which did not vary from the UTC, as well as reduced dicamba efficacy with the addition of glyphosate. 2,4-D + glyphosate achieved complete control of Indian mallow and was among the most effective treatments for globemallow along with dicamba and 2,4-D alone and in combination. This work helps explain the recently increasing weediness of these species, as dicamba-glyphosate tank mixes have become a common component of herbicide weed management programs in cotton across the region. It also demonstrates potential for greater control with common cropland herbicides. Producers needing herbicide control of these species will need to determine which and when more effective products can be accommodated within their cropping systems.
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