Weed control, environmental impact and profitability of reduced rates of imazethapyr in combination with dimethenamid in dry beans

Soltani, Nader; Eerd, Laura L. Van; Vyn, Richard J.; Shropshire, Christy; Sikkema, Peter H.

doi:10.4141/cjps06014

Cited by 6 publications

(6 citation statements)

References 26 publications

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“…Only 22% or less of the MRR for dimethenamid plus dicamba/atrazine and nicosulfuron/rimsulfuron plus dicamba/diflufenzopyr was sufficient to provide yields at 95% of the weedfree check. These results are similar to those of other studies that have shown that herbicide rates can be reduced as much as 15 to 90% of the MRR without any significant yield losses in corn under some environmental conditions (Forcella 1995;Hamill and Zhang 1995;Weide et al 1995;Schans and Weide 1999;Alm et al 2000;Zhang et al 2000;Hamill et al 2004). However, other research has shown yield reductions of 10 to 15% in corn under some environmental conditions when nicosulfuron plus rimsulfuron was tank-mixed with other herbicides at 25% of MRR (Sikkema et al 2007).…”

Section: Yieldsupporting

confidence: 81%

“…Some researchers have found adequate weed control and improved economic returns when herbicides are reduced 50 to 70% of the MRR (Forcella 1995;Hamill and Zhang 1995;Schans and Weide 1999). Other studies have shown that under some environmental conditions, herbicide rates can be reduced as much as 80 to 90% without a significant loss in the yield of corn (Weide et al 1995;Alm et al 2000).…”

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confidence: 99%

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Effect of reduced herbicide rates on weed control, environmental impact and profitability of corn

Soltani¹,

Vyn²,

Eerd³

et al. 2009

Can. J. Plant Sci.

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Soltani, N., Vyn, R. J., Van Eerd, L. L., Shropshire, C. and Sikkema, P. H. 2009. Effect of reduced herbicide rates on weed control, environmental impact and profitability of corn. Can. J. Plant Sci. 89: 969Á975. A study was conducted over a 3-yr period (2003, 2004, and 2005) to evaluate the effect of reduced herbicide rates Á 20, 40, 60, 80, and 100% of the manufacturer's recommended rate (MRR) Á on weed biomass reduction, environmental impact (EI), yield, and profitability of corn (Zea mays L.) in Ontario. The herbicide rate required to provide 95% biomass reduction of velvetleaf (Abutilon theophrasti Medic.), redroot pigweed (Amaranthus retroflexus L.), common ragweed (Ambrosia artemisiifolia L.), common lambsquarters (Chenopodium album L.), and annual grasses was 92, 30, 41, 28, and 83% of the MRR for isoxaflutole plus atrazine, 200, 119, 23, 23, and 117% of the MRR for dimethenamid plus dicamba/atrazine, 141, 72, 46, 45, and 200% of the MRR for glufosinate plus atrazine, and 81, 29, 18, 24, and 88% of the MRR for nicosulfuron/rimsulfuron plus dicamba/ diflufenzopyr, respectively. The herbicide rate required to provide 95% of weed-free corn yield was 61, 22, 130, and 11% of the MRR for isoxaflutole plus atrazine, dimethenamid plus dicamba/atrazine, glufosinate plus atrazine, and nicosulfuron/ rimsulfuron plus dicamba/diflufenzopyr, respectively. Nicosulfuron/rimsulfuron plus dicamba/diflufenzopyr had the lowest EI. The results of profitability analysis suggested that the MRR rates do not tend to maximize profit margins. In most cases, there were no significant differences in profit margins for treatments with 40, 60, 80, and 100% of the MRR. 'atrazine, et a`81, 29, 18, 24 et 88 % du TRF pour le nicosulfuron/rimsulfuron additionne´de dicamba/ diflufenzopyr. Le taux d'application ne´cessaire pour obtenir un rendement de 95 % en maı¨s sans mauvaises herbes correspond respectivement a`61, 22, 130 et 11 % du TRF pour l'isoxaflutole additionne´d'atrazine, le dime´the`namide additionne´de dicamba/atrazine, le glufosinate additionne´d'atrazine et le nicosulfuron/rimsulfuron additionne´de dicamba/ diflufenzopyr. Le nicosulfuron/rimsulfuron additionne´de dicamba/diflufenzopyr a le plus faible impact sur l'environnement. Les re´sultats de l'analyse de rentabilite´laissent croire que le TRF n'a pas tendance a`maximiser la marge be´ne´ficiaire. Dans la plupart des cas, la marge be´ne´ficiaire ne varie pas sensiblement entre les taux d'application correspondant a`40, 60, 80 et 100 % du TRF.

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Section: Yieldsupporting

confidence: 81%

mentioning

confidence: 99%

Effect of reduced herbicide rates on weed control, environmental impact and profitability of corn

Soltani¹,

Vyn²,

Eerd³

et al. 2009

Can. J. Plant Sci.

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“…Similarly, Chomas & Kells (2004) found that pendimethalin provided greater (98%) and more consistent control of common lambsquarters in maize (Zea mays L.) than metolachlor (66%). Soltani et al (2007) also found poor control of common lambsquarters by the chloroacetamide dimethenamid applied in kidney beans, while Kantar et al (1999) reported satisfactory control of this weed by the urea linuron or by the imidazolinone imazethapyr applied in preemergence in chickpea.…”

Section: Weeds Presencementioning

confidence: 99%

Response of vetch, lentil, chickpea and red pea to pre- or post-emergence applied herbicides

Vasilakoglou

Vlachostergios

Dhima

et al. 2013

Span. j. agric. res.

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Broad-leaved weeds constitute a serious problem in the production of winter legumes, but few selective herbicides controlling these weeds have been registered in Europe. Four field experiments were conducted in 2009/10 and repeated in 2010/11 in Greece to study the response of common vetch (Vicia sativa L.), lentil (Lens culinaris Medik.), chickpea (Cicer arietinum L.) and red pea (Lathyrus cicera L.) to several rates of the herbicides pendimethalin, S-metolachlor, S-metolachlor plus terbuthylazine and flumioxazin applied pre-emergence, as well as imazamox applied post-emergence. Phytotoxicity, crop height, total weight and seed yield were evaluated during the experiments. The results of this study suggest that common vetch, lentil, chickpea and red pea differed in their responses to the herbicides tested. Pendimethalin at 1.30 kg ha -1 , S-metolachlor at 0.96 kg ha -1 and flumioxazine at 0.11 kg ha -1 used as pre-emergence applied herbicides provided the least phytotoxicity to legumes. Pendimethalin at 1.98 kg ha -1 and both rates of Smetolachlor plus terbuthylazine provided the greatest common lambsquarters (Chenopodium album L.) control. Imazamox at 0.03 to 0.04 kg ha -1 could also be used as early post-emergence applied herbicide in common vetch and red pea without any significant detrimental effect.

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“…The impact of a specific herbicide is determined by taking the EIQ of the herbicide and multiplying it by the application rate; the lower the number, the lower the EI of the herbicide (Edwards-Jones and Howells 2001; Kovach et al 1992Kovach et al , 1999. The EIQ has been used by various researchers to determine the environmental risks of various weed management strategies (Brimner et al 2005;Edwards-Jones and Howells 2001;Fernandez-Cornejo 1998;Gallivan et al 2001;Sikkema et al 2007;Soltani et al 2007). The EIQ allows researchers as well as applicators to make a more informed decision on the potential environmental impact of the herbicide being used.…”

mentioning

confidence: 99%

Glyphosate-Resistant Common Ragweed (Ambrosia artemisiifolia) Control with Postemergence Herbicides and Glyphosate Dose Response in Soybean in Ontario

et al. 2015

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Field trials were conducted in Ontario in 2013 and 2014 in soybean to determine the efficacy of POST herbicides on common ragweed resistant to group 2 and group 9 herbicides. Glyphosate dose-response experiments were conducted in the field on two resistant common ragweed populations and one susceptible population. None of the POST herbicides evaluated provided 80% control of glyphosate-resistant (GR) common ragweed. The most effective POST herbicide mixture was glyphosate (Monsanto Canada Inc., 67 Scurfield Blvd., Winnipeg, Manitoba, Canada) plus fomesafen(Syngenta Canada Inc., 140 Research Lane, Research Park Guelph, Ontario, Canada), which provided 68 to 98% control of GR common ragweed. Chlorimuron, cloransulam, imazethapyr, and thifensulfuron provided control similar to glyphosate alone. An application of glyphosate/fomesafen reduced biomass by as much as 95%. Glyphosate plus acifluorfen reduced GR common ragweed biomass by as much as 92%. The remaining POST herbicide tank mixes evaluated reduced GR common ragweed biomass by less than 80%. Glyphosate plus bentazon, glyphosate plus chlorimuron, and glyphosate plus thifensulfuron resulted in soybean yields similar to the weedy control, with yield reductions of 70, 62, and 73%, respectively. An application of glyphosate plus fomesafen or glyphosate/fomesafen had the lowest soybean yield reductions of 29 and 34%, respectively. The resistant biotype required a 2- to 28-fold increase in glyphosate dose compared to the susceptible population to achieve 50% control.

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Weed control, environmental impact and profitability of reduced rates of imazethapyr in combination with dimethenamid in dry beans

Cited by 6 publications

References 26 publications

Effect of reduced herbicide rates on weed control, environmental impact and profitability of corn

Effect of reduced herbicide rates on weed control, environmental impact and profitability of corn

Response of vetch, lentil, chickpea and red pea to pre- or post-emergence applied herbicides

Glyphosate-Resistant Common Ragweed (Ambrosia artemisiifolia) Control with Postemergence Herbicides and Glyphosate Dose Response in Soybean in Ontario

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