Weed Management Programs with Pyroxasulfone in Field Corn (<i>Zea mays</i>)

Stephenson, Daniel O.; Bond, Jason A.; Griffin, James L.; Landry, Randall L.; Woolam, Brandi C.; Edwards, H. Matthew; Hardwick, John M.

doi:10.1017/wet.2017.39

Cited by 3 publications

(8 citation statements)

References 20 publications

(47 reference statements)

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“…Density and aboveground dry weight of barnyardgrass were comparable to the weedy plots for all VLCFA inhibitor herbicides except for S-metolachlor which reduced which decreased density 86% and aboveground dry weight 97% (Table 7). In other studies, pyroxasulfone (PRE) at 150 g•ai•ha −1 controlled barnyardgrass 93 to 96% in corn [9]. Yamaji et al [22] also found 100% barnyardgrass control with pyroxasulfone (PRE) at 125 to 250 g•ai•ha −1 in corn.…”

Section: Green Foxtailmentioning

confidence: 91%

“…However, weed interference with pethoxamid and S-metolachlor reduced corn yield 28 and 33%, respectively. Stephenson et al [9] in Louisiana found no yield loss with pyroxasulfone (PRE) at 125 g•ai•ha −1 in corn. Knezevic et al [13] in Nebraska reported that pyroxasulfone has to be applied PRE at approximately 195 g•ai•ha −1 to maintain corn yield comparable to 95% of the weed-free control.…”

Section: Corn and Soybean Yieldmentioning

confidence: 99%

“…Herbicide diversity is crucial for long-term sustainable crop production. Evolution of glyphosate-resistant and multiple-resistant weeds especially weeds resistant to Group 2, 5, 9, 14, and 27 herbicides in recent years is problematic for many growers in North America [9]. ese modes-of-action are among the most valuable tools for weed management in corn and soybean [9].…”

Section: Introductionmentioning

confidence: 99%

“…Evolution of glyphosate-resistant and multiple-resistant weeds especially weeds resistant to Group 2, 5, 9, 14, and 27 herbicides in recent years is problematic for many growers in North America [9]. ese modes-of-action are among the most valuable tools for weed management in corn and soybean [9]. VLCFA inhibitor herbicides provide an alternative mode-of-action to commonly used herbicides and are an effective herbicide option for weed control in corn and soybean.…”

Section: Introductionmentioning

confidence: 99%

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Weed Control in Corn and Soybean with Group 15 (VLCFA Inhibitor) Herbicides Applied Preemergence

Soltani

Brown

Sikkema

2019

International Journal of Agronomy

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Limited information exists on the efficacy of pethoxamid for annual grass and broadleaf control in corn and soybean in Ontario. A total of 10 field experiments (5 with corn and 5 with soybean) were conducted during 2015 to 2017 in Ontario, Canada, to compare the weed control efficacy of dimethenamid-P at 544 g·ai·ha−1, pethoxamid at 840 g·ai·ha−1, pyroxasulfone at 100 g·ai·ha−1, and S-metolachlor at 1050 g·ai·ha−1 applied preemergence (PRE). Reduced weed interference with pyroxasulfone and dimethenamid-P resulted in corn yield that was similar to the weed-free control; however, weed interference with pethoxamid and S-metolachlor reduced corn yield 28 and 33%, respectively. Reduced weed interference with pyroxasulfone resulted in soybean yield that was similar to the weed-free control; however, weed interference with pethoxamid, dimethenamid-P, and S-metolachlor reduced soybean yield 27, 27, and 30%, respectively. At 4 and 8 weeks after application (WAA), all VLCFA inhibitor herbicides (Group 15) provided excellent redroot pigweed control (90 to 99%) in corn. There were no differences in common ragweed control, density, and dry weight among the VLCFA inhibitor herbicide evaluated; pyroxasulfone provided highest numeric common ragweed control and lowest numeric density and dry weight. At 4 and 8 WAA, pyroxasulfone provided the best common lambsquarters and wild mustard control and lowest numeric density and dry weight in corn and soybean. At 8 WAA, the VLCFA inhibitor herbicides controlled green foxtail 91 to 96% in corn; dimethenamid-P provided better control of green foxtail than pethoxamid in soybean. There were no differences in barnyard grass control among the VLCFA inhibitor herbicides evaluated.

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Section: Green Foxtailmentioning

confidence: 91%

Section: Corn and Soybean Yieldmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Weed Control in Corn and Soybean with Group 15 (VLCFA Inhibitor) Herbicides Applied Preemergence

Soltani

Brown

Sikkema

2019

International Journal of Agronomy

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“…Merr. ), and sunflower ( Helianthus annuus L.) crops (Anonymous 2021b; Boutsalis et al 2014; Olson et al 2011; Shaner 2014; Stephenson et al 2017a, 2017b; Tanetani et al 2009). Pyroxasulfone is a low-use-rate, relatively less water-soluble herbicide compared with other chloroacetamide VLCFA elongase–inhibiting herbicides such as S -metolachlor (Shaner 2014; Westra 2012).…”

Section: Introductionmentioning

confidence: 99%

Preemergence and postemergence weed control in sweet corn on organic soils

et al. 2023

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Alternative weed management programs are needed for sweet corn on organic soils in the Everglades Agricultural Area (EAA) in southern Florida, which is reliant mostly on atrazine and S-metolachlor. Field experiments were conducted in 2021 and 2022 to evaluate the efficacy of pyroxasulfone (183 and 237 g ha-1) alone or as a premix with carfentrazone-ethyl (13 and 17 g ha-1) or fluthiacet-methyl (6 and 7 g ha-1), S-metolachlor (1,790 g ha-1) alone or in combination with atrazine (3,360 g ha-1) applied preemergence (PRE); mesotrione (105 g ha-1), topramezone (25 g ha-1), and tembotrione (92 g ha-1) applied postemergence (POST) alone or in combination with atrazine (560 and 2,240 g ha-1) or bentazon (1,120 g ha-1); and mechanical cultivation alone at the fourth and the fourth followed by the sixth leaf stages of sweet corn. Preemergence-applied herbicides did not provide acceptable fall panicum, common lambsquarters, and common purslane control probably due to lack of incorporation into the soil because of limited rainfall. Postemergence topramezone alone or in combination with atrazine or bentazon resulted in effective fall panicum control (>91%). Topramezone alone provided 83% and 88% common lambsquarters and common purslane control, respectively, whereas addition of atrazine to topramezone resulted in >94% control of both weed species. Mesotrione and tembotrione plus atrazine provided excellent control (>93%) of both broadleaf weed species but poor fall panicum control (<72%). Mechanical cultivation alone did not effectively control any weeds. Overall, topramezone treatment programs resulted in higher sweet corn yield. These results show that combining topramezone, mesotrione, and tembotrione with atrazine improved broadleaf weed control. Fall panicum control was only improved with the combination of topramezone with atrazine showing that atrazine is an important mixture component of these herbicides to provide effective postemergence weed control in sweet corn on organic soils of the EAA.

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Weed control in corn with tolpyralate and atrazine plus grass herbicides

Soltani,

Shropshire,

Sikkema

2023

Weed Technol

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Six field experiments were established in southwestern Ontario in 2021 and 2022 to evaluate if the addition of a grass herbicide (acetochlor, dimethenamid-p, flufenacet, pendimethalin, pyroxasulfone, or S-metolachlor) to tolpyralate + atrazine improves late-season weed control in corn. Tolpyralate + atrazine caused 12% and 5% corn injury at 1 and 4 weeks after herbicide application (WAA); corn injury was not increased with the addition of a grass herbicide. Weed inference reduced corn yield 60%. The addition of a grass herbicide to tolpyralate + atrazine did not enhance velvetleaf control. The addition of acetochlor or dimethenamid-p to tolpyralate + atrazine enhanced pigweed species control 4% 4 WAA; the addition of other grass herbicides tested did not increase pigweed species control. The addition of acetochlor enhanced common ragweed control 5% at 4 WAA and the addition of acetochlor or dimethenamid-p enhanced common ragweed control 8% at 8 WAA; the addition of other grass herbicides did not improve common ragweed control. The addition of acetochlor to tolpyralate + atrazine enhanced common lambsquarters control up to 4%; there was no enhancement in common lambsquarters control with the addition of the other grass herbicides. Tolpyralate + atrazine controlled barnyardgrass 90% and 78% at 4 and 8 WAA, respectively; the addition of a grass herbicide enhanced barnyardgrass control 9 to 10% and 21% at 4 and 8 WAA, respectively. Tolpyralate + atrazine controlled green or giant foxtail 80% and 69% at 4 and 8 WAA, respectively; the addition of a grass herbicide enhanced foxtail species control 15 to 19% and 24 to 29% at 4 and 8 WAA, respectively. This research shows that adding a grass herbicide to tolpyralate + atrazine mixture can improve weed control efficacy, especially increased annual grass control in corn production.

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Weed Management Programs with Pyroxasulfone in Field Corn (Zea mays)

Cited by 3 publications

References 20 publications

Weed Control in Corn and Soybean with Group 15 (VLCFA Inhibitor) Herbicides Applied Preemergence

Weed Control in Corn and Soybean with Group 15 (VLCFA Inhibitor) Herbicides Applied Preemergence

Preemergence and postemergence weed control in sweet corn on organic soils

Weed control in corn with tolpyralate and atrazine plus grass herbicides

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