2021
DOI: 10.1111/wre.12477
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Effect of drought stress on herbicide performance and photosynthetic activity of Avena sterilis subsp. ludoviciana (winter wild oat) and Hordeum spontaneum (wild barley)

Abstract: The severity of drought is increasing owing to global climate change. Knowledge about the influence of drought on weeds and herbicide performance is necessary for optimising herbicide applications. Therefore, dose-response trials were conducted to investigate the influence of drought stress on the efficacy of four herbicides.Drought-stressed and non-stressed Hordeum spontaneum seedlings were exposed to nine doses of sulfosulfuron and sulfosulfuron + metsulfuron-methyl. Clodinafoppropargyl and mesosulfuron-meth… Show more

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Cited by 10 publications
(5 citation statements)
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“…A severe drought occurred in the Pacific Northwest in the summer of 2021 that reduced winter wheat yields by 44% in Washington (Ansah and Walsh 2021). The literature suggests that plants exposed to dry soil conditions, water stress, or both have reduced herbicide uptake and translocation compared to non-stressed plants (Alizade et al 2021; Skelton et al 2016; Waldecker and Wyse 1985). Treatments applied at Reardan were applied later in the season than those at the other sites; thus, the plants at Reardan may have been experiencing greater drought stress, which may also explain the lower stem density at this site compared to Malden and Rock Lake.…”
Section: Resultsmentioning
confidence: 99%
“…A severe drought occurred in the Pacific Northwest in the summer of 2021 that reduced winter wheat yields by 44% in Washington (Ansah and Walsh 2021). The literature suggests that plants exposed to dry soil conditions, water stress, or both have reduced herbicide uptake and translocation compared to non-stressed plants (Alizade et al 2021; Skelton et al 2016; Waldecker and Wyse 1985). Treatments applied at Reardan were applied later in the season than those at the other sites; thus, the plants at Reardan may have been experiencing greater drought stress, which may also explain the lower stem density at this site compared to Malden and Rock Lake.…”
Section: Resultsmentioning
confidence: 99%
“…Increased CO 2 levels can decrease stomatal conductance by up to 50% in some plant species [65]. The activity of foliage-applied herbicides might be altered by decreased stomatal conductance [66]. Furthermore, increased leaf thickness and the reduced count of open stomata due to high levels of CO 2 may reduce the efficacy of the post-emergence herbicides directly absorbed by the plants.…”
Section: Increased Co 2 Levels and Herbicide Efficacymentioning
confidence: 99%
“…It has been already established that herbicide action could be modified under unfavorable environmental conditions, like varying temperatures [40], drought [41], and high salinity [42]. Weed control in waterlogged fields resulting from heavy precipitation at the beginning of vegetation is particularly unpredictable.…”
Section: Herbicide Treatment Reduces Triticale Tolerance To Prolonged...mentioning
confidence: 99%