Control of glyphosate-resistant Canada fleabane [<i>Conyza canadensis</i>(L.) Cronq.] with preplant herbicide tankmixes in soybean [<i>Glycine max</i>. (L). Merr.]

BykerHolly, P; SoltaniNader,; RobinsonDarren, E; TardifFrançois, J; LawtonMark, B; SikkemaPeter, H

doi:10.4141/cjps2012-320

Cited by 40 publications

(43 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ford et al (2014), recently reported that Canada fleabane demonstrated varying levels of 2,4-D tolerance, which could explain this range in control. For two-way tank mixture of glyphosate + amitrole, Byker et al (2013a) found that control with 900 + 2000 g ai ha −1 at 4 WAT was similar to the current study. For the three-way tank mixtures, the addition of amitrole improved control, compared with the two-way tank mixtures, to greater than 90%, while glyphosate + saflufenacil + 2,4-D controlled GR Canada fleabane to a similar level (Table 2).…”

Section: Resultssupporting

confidence: 66%

“…These results were generally consistent with previous studies from our research group which demonstrated that GR Canada fleabane control can vary. For example, Byker et al (2013b) reported control 4 WAT as low as 62% with glyphosate + 2,4-D (900 + 560 g ai ha −1 ); but in a related study, Byker et al (2013a) found that control with glyphosate + 2,4-D (900 + 500 g ai ha −1 ) ranged from 78% to 92% at 4 WAT. Ford et al (2014), recently reported that Canada fleabane demonstrated varying levels of 2,4-D tolerance, which could explain this range in control.…”

Section: Resultsmentioning

confidence: 99%

“…While amitrole is considered a niche product (Anonymous 2014), this herbicide has been shown to be safe to use at high rates as a PP burndown in soybean (Soltani et al 2008) and can control GR weeds (OMAFRA 2013;Anonymous 2014). For example, a tank mixture of glyphosate and amitrole has been highly effective in controlling both GR Canada fleabane (Byker et al 2013a) and GR giant ragweed (Follings et al 2013a). Unfortunately, these species could be present in the same field (Westhoven et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…For example, at some locations, preplant (PP) glyphosate tank mixtures containing saflufenacil or 2,4-D can provide control equivalent to the weed-free treatment for up to four weeks after treatment (WAT) for GR Canada fleabane (Byker et al 2013a) or GR giant ragweed (Vink et al 2012a). While at other locations, the control of these species was around 50% four WAT using glyphosate + cloransulam (Vink et al 2012a;Byker et al 2013a). The low level of control in these instances could be due to the presence of multiple resistant (glyphosate and cloransulam) biotypes of Canada fleabane (Byker et al 2013c) and giant ragweed (Follings et al 2013b), further complicating weed management decisions.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Herbicide tank mixtures to control co-existing glyphosate-resistant Canada fleabane and giant ragweed in soybean

Mahoney¹,

McNaughton²,

Sikkema³

2016

Can. J. Plant Sci.

View full text Add to dashboard Cite

Populations of glyphosate-resistant (GR) Canada fleabane and GR giant ragweed can be found in several locations in southwestern Ontario. While these species can be managed individually, a scenario has developed where both species are present in GR soybean. Ten separate field experiments (five with Canada fleabane and five with giant ragweed) were conducted over a 2-yr period (2013)(2014) in soybean to evaluate preplant (PP) herbicide tank mixtures that could control both weed species if they were present in the same field. Herbicides were rated for soybean injury, weed control, population density, and aboveground biomass. Two-and three-way tank mixtures containing amitrole (i.e., glyphosate + amitrole, glyphosate + amitrole + saflufenacil, and glyphosate + amitrole + 2,4-D) were among the most effective treatments. For example, control of GR Canada fleabane and GR giant ragweed was at least 92% at 4 wk after treatment (WAT) and weed density and biomass were generally similar to the weed-free control. However, without amitrole, the best PP herbicide option was a three-way tank mixture of glyphosate + saflufenacil + 2,4-D which provided improved control and greater reductions in density and biomass compared with the two-way glyphosate tank mixtures containing saflufenacil or 2,4-D.Key words: glyphosate resistance, soybean [Glycine max (L.) Merr.], weed control.Résumé : On trouve des peuplements de vergerette du Canada et de grande herbe à poux résistants au glyphosate (RG) à plusieurs endroits dans le sud-ouest de l'Ontario. Bien que l'on puisse combattre ces espèces séparément, il arrive que les deux se retrouvent dans des champs de soja RG. Les auteurs ont entrepris dix expériences sur le terrain (cinq avec la vergerette du Canada et autant avec la grande herbe à poux) au cours d'une période de deux ans (2013, 2014), dans des cultures de soja, afin d'évaluer des mélanges d'herbicides de présemis susceptibles de lutter contre les deux adventices quand elles infestent le même champ. Les herbicides ont été cotés d'après les dommages causés à la culture, la destruction des mauvaises herbes, la densité du peuplement et la biomasse aérienne. Les mélanges à deux et à trois voies contenant de l'amitrole (à savoir, glyphosate + amitrole, glyphosate + amitrole + saflufénacil et glyphosate + amitrole + 2,4-D) figurent parmi les plus efficaces. Ainsi, au moins 92 % de la vergerette du Canada RG et de la grande herbe à poux RG avaient été détruites, quatre semaines après le traitement, et la densité du peuplement de même que la biomasse aérienne des adventices étaient généralement semblables à celles observées sur les parcelles témoin désherbées. Sans amitrole cependant, le meilleur herbicide de présemis est un mélange à trois voies composé de glyphosate + saflufénacil + 2,4-D. Il permet une meilleure lutte et une plus grande réduction de la densité de peuplement et de la biomasse aérienne des adventices que les mélanges de glyphosate à deux voies renfermant du saflufénacil ou du 2,4-D. [Traduit par la Rédaction] M...

show abstract

Section: Resultssupporting

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Herbicide tank mixtures to control co-existing glyphosate-resistant Canada fleabane and giant ragweed in soybean

Mahoney¹,

McNaughton²,

Sikkema³

2016

Can. J. Plant Sci.

View full text Add to dashboard Cite

show abstract

Tolerance of azuki bean to herbicides applied preplant for weed control in a strip‐tillage cropping system

2022

View full text Add to dashboard Cite

Five field experiments were conducted at Huron Research Station near Exeter, Ontario, Canada, during 2018 to 2020 to assess the tolerance of strip-till-grown azuki bean to various preplant (PP) herbicides. The herbicides selected have activity on glyphosate-resistant (GR) Canada fleabane, an emerging weed biotype in strip-till azuki bean production. Saflufenacil, metribuzin, 2,4-D ester, saflufenacil + metribuzin, saflufenacil + 2,4-D ester, metribuzin + 2,4-D ester, and saflufenacil + metribuzin + 2,4-D ester, applied PP 1 week before seeding, at the proposed label rate (1X) and twice that rate (2X) caused as much as 6%, 5%, 6%, 7%, 8%, 10%, and 13% visible azuki bean injury. The herbicide-induced azuki bean injury was transient and had no effect on plant density, aboveground dry biomass, height, maturity, and yield except for the dry biomass which was reduced by 28% with metribuzin + 2,4-D ester and 36% with saflufenacil + metribuzin + 2,4-D ester at the 2X rate and azuki bean height which was reduced 9% at the 2X rate with saflufenacil + metribuzin + 2,4-D ester. Based on these results, saflufenacil, metribuzin, 2,4-D ester, saflufenacil + metribuzin, saflufenacil + 2,4-D ester, and metribuzin + 2,4-D ester applied PP have potential for GR Canada fleabane control in strip-till azuki beans. However, there is not enough crop safety for using a three-way tankmix of saflufenacil + metribuzin + 2,4-D ester, applied PP, in azuki bean production.

show abstract

Biology and management of two important Conyza weeds: a global review

Bajwa

Sadia

Ali

et al. 2016

Environ Sci Pollut Res

View full text Add to dashboard Cite

Weed management is one of the prime concerns for sustainable crop production. Conyza bonariensis and Conyza canadensis are two of the most problematic, noxious, invasive and widespread weeds in modern-day agriculture. The biology, ecology and interference of C. bonariensis and C. canadensis have been reviewed here to highlight pragmatic management options. Both these species share a unique set of biological features, which enables them to invade and adapt a wide range of environmental conditions. Distinct reproductive biology and an efficient seed dispersal mechanism help these species to spread rapidly. Ability to interfere strongly and to host crop pests makes these two species worst weeds of cropping systems. These weed species cause 28-68 % yield loss in important field crops such as soybean and cotton every year. These weeds are more prevalent in no-till systems and, thus, becoming a major issue in conservation agriculture. Cultural practices such as crop rotations, seed rate manipulation, mulching, inter-row tillage and narrow row spacing may provide an effective control of these species. However, such methods are not feasible and applicable under all types of conditions. Different herbicides also provide a varying degree of control depending on crop, agronomic practices, herbicide dose, application time and season. However, both these species have evolved resistance against multiple herbicides, including glyphosate and paraquat. The use of alternative herbicides and integrated management strategies may provide better control of herbicide-resistant C. bonariensis and C. canadensis. Management plans based on the eco-biological interactions of these species may prove sustainable in the future.

show abstract

Control of glyphosate-resistant Canada fleabane [Conyza canadensis(L.) Cronq.] with preplant herbicide tankmixes in soybean [Glycine max. (L). Merr.]

Cited by 40 publications

References 21 publications

Herbicide tank mixtures to control co-existing glyphosate-resistant Canada fleabane and giant ragweed in soybean

Herbicide tank mixtures to control co-existing glyphosate-resistant Canada fleabane and giant ragweed in soybean

Tolerance of azuki bean to herbicides applied preplant for weed control in a strip‐tillage cropping system

Biology and management of two important Conyza weeds: a global review

Contact Info

Product

Resources

About