Canada fleabane (<i>Conyza canadensis)</i> control with preplant applied residual herbicides followed by 2,4-D choline/glyphosate DMA applied postemergence in corn

FordLaura,; SoltaniNader,; RobinsonDarren, E; Nurse, Robert E.; McFaddenAllan,; SikkemaPeter, H

doi:10.4141/cjps2013-403

Cited by 18 publications

(29 citation statements)

References 22 publications

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“…Davis et al (2010) reported that spring applications of saflufenacil provided excellent control of Canada fleabane by reducing densities more than 90%. The results from this study are also similar to the results reported by Ford et al (2014), who found that saflufenacil/ dimethenamid-p applied PP provided control of GR Canada fleabane that was similar to weed-free treatment.…”

supporting

confidence: 90%

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Control of glyphosate-resistant Canada fleabane in corn with preplant herbicides

Brown¹,

Shropshire²,

Sikkema³

2016

Can. J. Plant Sci.

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supporting

confidence: 90%

“…treatment with atrazine, flumetsulam, and s-metolachlor/atrazine. Ford et al (2014) reported that s-metolachlor/atrazine (1800 g a.i. ha −1 ) did not provide effective control of GR Canada fleabane, which is consistent with the results from this study.…”

mentioning

confidence: 99%

Control of glyphosate-resistant Canada fleabane in corn with preplant herbicides

Brown¹,

Shropshire²,

Sikkema³

2016

Can. J. Plant Sci.

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“…Any visible crop injury symptoms in these studies did not affect corn yield. Left uncontrolled, GR Canada fleabane reduced corn grain yields by up to 50% in this study, which is similar to research by Ford et al [48] that observed a 69% yield loss due GR Canada fleabane interference in corn.…”

Section: Discussionsupporting

confidence: 91%

Influence of Adjuvants on the Control of Glyphosate-Resistant Canada Fleabane and Waterhemp in Corn with Tolpyralate

Langdon¹,

Soltani²,

Raedar³

et al. 2020

AJPS

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Tolpyralate is a new benzoylpyrazole herbicide for weed management in corn. It is recommended to be co-applied with atrazine along with the adjuvants methylated seed oil concentrate (MSO) plus an ammonium nitrogen fertilizer, such as urea ammonium nitrate (UAN). Two studies were conducted on glyphosate-resistant (GR) Canada fleabane and GR waterhemp to determine if an additional adjuvant is still required when tolpyralate plus atrazine are tankmixed with a commercial glyphosate formulation (Roundup WeatherMAX®) in corn. Trials were conducted over a two-year period (2018-19) on farms in south western Ontario with confirmed GR populations. When co-applied with Roundup WeatherMAX®, the addition of MSO to tolpyralate + atrazine increased control of GR waterhemp 9%; however, there was no increase in GR Canada fleabane control from the addition of additional adjuvants. At 8 WAA, all treatments provided > 91% and > 84% control of GR waterhemp and GR Canada fleabane, respectively. This study concludes that the addition of Roundup Weathermax® to tolpyralate plus atrazine improves the control of GR waterhemp and GR Canada fleabane in corn.

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“…ha provided 97% to 99% control of GR Canada fleabane. In contrast, Ford et al (2014) reported that glyphosate plus isoxaflutole plus atrazine (900 + 52.5 + 500 g a.i. ha 1 ) provided variable control of GR Canada fleabane ranging from 27 to 97% in corn.…”

Section: Biologically Effective Dose Of Isoxaflutole and Metribuzin Cmentioning

confidence: 91%

Control of glyphosate-resistant Canada fleabane [Conyza canadensis (L.) Cronq.] with isoxaflutole and metribuzin tank mix

et al. 2016

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The future release of 'Balance GT' soybean, which is resistant to isoxaflutole and glyphosate, opens up the possibility for control of glyphosate-resistant (GR) Canada fleabane using HPPD-inhibiting herbicides (Group 27) in soybean. Field trials were conducted over two years to evaluate the dose response of an isoxaflutole plus metribuzin tank mix, as well as each chemical applied alone, to assess their response using Flint's adaptation of Colby's equation. Factorial experiments were performed in growth room and greenhouse environments to assess isoxaflutole versus glyphosate, isoxaflutole versus metribuzin, and isoxaflutole plus metribuzin versus glyphosate. Tank mixes of isoxaflutole plus metribuzin in a 1:4 ratio provided 80% control of GR Canada fleabane at a dose range between 420 (84 + 336) and 611 (122 + 489) g a.i. ha 1 at 8 WAA (weeks after application). Tank mixes achieved an 80% reduction in biomass at a dose range between 498 and 738 g a.i. ha 1 , while 80% reduction in density was obtained with doses from 96 to 423 g a.i. ha 1 , 8 WAA. With glyphosate as a constant tank partner, field treatments of isoxaflutole plus metribuzin were mostly synergistic with some analyses showing an additive response. When tested in the growth room, isoxaflutole plus glyphosate tank mixes indicate additivity in the majority of treatments on glyphosate-susceptible (GS) fleabane.Key words: additive, antagonistic, Canada fleabane, glyphosate, herbicide resistance, soybean, synergistic, yield.Résumé : L'homologation prochaine du soja 'Balance GT' résistant à l'isoxaflutole et au glyphosate ouvre la porte à la lutte contre la vergerette du Canada résistante au glyphosate (RG) par les herbicides qui inhibent la HPPD (groupe 27) chez le soja. Les auteurs ont effectué des essais au champ pendant deux ans afin d'évaluer la doseréponse d'un mélange d'isoxaflutole et de métribuzine ainsi que celle de chacun de ces herbicides en recourant à l'équation de Colby adaptée par Flint. À cette fin, ils ont réalisé des expériences factorielles dans une chambre de croissance et en serre, et comparé les effets de l'isoxaflutole à ceux du glyphosate, ceux de l'isoxaflutole à ceux de la métribuzine, et ceux du mélange isoxaflutole-métribuzine à ceux du glyphosate. Le mélange d'isoxaflutole et de métribuzine dans un rapport de 1:4 détruit 80 % de la vergerette du Canada RG à un taux d'application situé entre 420 (84 + 336) et 611 (122 + 489) grammes de matière active par hectare, huit semaines après l'application. Le mélange entraîne une diminution de 80 % de la biomasse à un taux d'application de 498 à 738 g de matière active par hectare, alors qu'on observe une baisse de 80 % de la densité avec des doses de 96 à 423 g de matière active par hectare, huit semaines après application. Lorsque le glyphosate fait partie du mélange, l'isoxaflutole et la métribuzine appliquées au champ fonctionnent en synergie, certaines analyses indiquant même que leurs effets s'additionnent. Lors des essais en chambre de croissance, les mélanges d'isoxaf...

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Canada fleabane (Conyza canadensis) control with preplant applied residual herbicides followed by 2,4-D choline/glyphosate DMA applied postemergence in corn

Cited by 18 publications

References 22 publications

Control of glyphosate-resistant Canada fleabane in corn with preplant herbicides

Control of glyphosate-resistant Canada fleabane in corn with preplant herbicides

Influence of Adjuvants on the Control of Glyphosate-Resistant Canada Fleabane and Waterhemp in Corn with Tolpyralate

Control of glyphosate-resistant Canada fleabane [Conyza canadensis (L.) Cronq.] with isoxaflutole and metribuzin tank mix

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