Efficacy and metabolism of MON 37500 in<i>Triticum aestivum</i>and weedy grass species as affected by temperature and soil moisture

Olson, Brian L. S.; Al‐Khatib, Kassim; Stahlman, Phillip W.; Isakson, Paul J.

doi:10.1614/0043-1745(2000)048[0541:eamomi]2.0.co;2

Cited by 67 publications

(64 citation statements)

References 29 publications

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“…Also, the results of this work support the hypothesis that oat crop tolerance to iodosulfuron-methyl is temperature- (Koeppe et al, 2000). Also, the sulfonylurea sulfosulfuron injury to wheat plants was higher at 21/7 o C (day/night) than at 10/5 o C (Geier et al, 1999), in part, because at lower temperatures plants have reduced leaf area, thus reduced absorption and translocation of the herbicide (Olson et al, 2000).…”

Section: Resultssupporting

confidence: 77%

An Innovative Method to Evaluate the Impact of Temperature on Iodosulfuron-Methyl Selectivity to Oat Crop

et al. 2017

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-Temperature affects the selectivity of post-emergence herbicides in a complex manner. The objective of this work was to develop a method to estimate the impact of temperature on herbicide selectivity using the white oat (Avena sativa) crop and iodosulfuron-methyl as study models. Greenhouse/growth-chamber experiments were conducted using a completely randomized design with the treatments arranged as a bi-factorial, with three repetitions. The first factor consisted of six temperatures (10, 15, 20, 24, 28 and ). For each temperature, regression curves were fitted to the dose-response data. The rate of herbicide efficacy was computed through the method first proposed in this study. The crop tolerance to the herbicide increased proportionally to the temperature, suggesting the product detoxification is improving crop selectivity. In practical terms, it is predicted that white oat crop tolerance to iodosulfuron-methyl increases in regions of the world with high temperatures. The method developed here also can be used to understand the effect of temperature on herbicide efficacy on weeds.Keywords: Avena sativa, crop tolerance, environmental factors, herbicide detoxification. (10, 15, 20, 24, 28 de iodosulfuron (0; 0,2; 0,4; 0,8; 1,2; 5; e 20 g ha -1 RESUMO -A temperatura impacta a seletividade de herbicidas em pós-emergência de forma complexa. O objetivo deste trabalho foi desenvolver um método para estimar o impacto da temperatura na seletividade de herbicida, utilizando aveia cultivada (Avena sativa) e iodosulfuron-methyl como modelos de estudo. Os experimentos foram conduzidos em casa de vegetação/câmaras de crescimento, utilizando-se delineamento inteiramente casualizado, com os tratamentos arranjados como bifatorial, com três repetições. O primeiro fator consistiu de seis temperaturas

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Section: Resultssupporting

confidence: 77%

An Innovative Method to Evaluate the Impact of Temperature on Iodosulfuron-Methyl Selectivity to Oat Crop

et al. 2017

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“…Negative effects were seen on wheat subjected to chlortoluron (Banting et al 1976), while no injury was observed when sulfosulfuron was applied on wheat exposed to different temperature cycles (25/238C vs. 5/38C) (Olson et al 2000). Other studies in cold chambers have been done on spring wheat (Xie et al 1994) or barley (McMullan 1994) exposed to one or two herbicides and the results were mixed, depending on the species and herbicide used.…”

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confidence: 99%

Winter wheat (Triticum aestivum L.) response to herbicides as affected by application timing and temperature

et al. 2015

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. 2015. Winter wheat (Triticum aestivum L.) response to herbicides as affected by application timing and temperature. Can. J. Plant Sci. 95: 325Á333. Field studies were conducted to determine the effects of cold temperatures and physiological growth stage at the time of application on the tolerance of winter wheat (Triticum aestivum L.) to 10 herbicides used in Ontario, Canada. Herbicides were applied: early during a frost event (when forecasted temperatures 508C); at a normal timing (Zadoks 21Á29); and a late timing (Zadoks 39). Visible injury, yield, plant height at maturity, test weight and 1000-kernel weight were measured to determine if environmental conditions or growth stage at the time of herbicide application influenced wheat tolerance. Cold temperatures at the time of herbicide application resulted in injury with three treatments: 2,4-D, dicamba/MCPA/mecoprop and dichlorprop/2,4-D. Visible injury was greatest at 14 d after treatment (DAT); it was, however, transient and yield, plant height, test weight and 1000-kernel weight were not affected. The herbicides 2,4-D, dichlorprop/2,4-D, and fenoxaprop-pethyl caused visible injury 14 DAT when applied at the normal timing, while 2,4-D at this timing, also caused injury 7 DAT. Dicamba/MCPA/mecoprop was the most injurious herbicide, causing 4% injury at the normal timing and 11% injury at the late application timing (42 DAT). Dicamba/MCPA/mecoprop caused yield reductions of 11 to 24% at two locations in 2010 when applied at the normal timing. Dicamba/MCPA/mecoprop reduced yield at 6 of the 8 site-years when applied late, and also reduced plant height. Cold temperatures at the time of application did not affect tolerance of winter wheat; however, visible injury was more likely to occur when herbicides were applied at later growth stages. In most cases, herbicide injury was transient and no impact on yield was observed. Dicamba/MCPA/mecoprop was the most injurious herbicide, causing prolonged injury at all application timings and reducing yields when applied at the normal timing. In addition, yield and plant height were affected negatively when this herbicide was applied late. . Le dicamba/MCPA/mecoprop a diminue´le rendement de 11 a`24% ad eux endroits, en 2010, apre`s application au moment habituel. Le dicamba/MCPA/mecoprop a re´duit le rendement a`six sites-anne´es sur huit apre`s une application tardive, en plus de diminuer la taille des plants. Le temps froid au moment de l'application n'affecte pas la tole´rance du ble´d'hiver, mais les dommages visibles sont plus susceptibles de survenir quand l'herbicide est applique´aux stades de croissance plus avance´s. Dans la plupart des cas, les dommages cause´s par les 4 Corresponding author (e-mail: ftardif@uoguelph.ca).Abbreviations: DAT, days after treatment; TKW, 1000-kernel weight Can.

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“…Under adverse soil-weather conditions, such as low * Means within weed species followed by the same letter are not significantly different at p = 0.05. temperature, relative humidity and soil moisture, herbicide activity may be reduced considerably giving lower efficacy than expected, while under optimal circumstances i.e. high relative humidity and sufficient soil moisture, herbicides achieve better weed control efficacy (Olson et al 2000, Kumaratilake & Preston 2005. In the present study, air temperature, relative humidity and soil moisture considerably affected tribenuron methyl activity on A. arvensis and S. media.…”

Section: Discussionmentioning

confidence: 52%

“…Tribenuron methyl is recommended to be used in combination with an adjuvant. Previous papers have reported that environmental conditions affect the activity of tribenuron methyl and other sulfonylurea herbicides (Kudsk et al 1990, Olson et al 2000. It has also been reported that the impact of climatic factors depends on weed species and can be modified in tank mix with adjuvants (Mathiassen & Kudsk 2002, Bunting et al 2004, Stagnari et al 2006, Aliverdi et al 2009, Pannacci et al 2010.…”

Section: Introductionmentioning

confidence: 99%

Influence of selected soil-climatic parameters and application method of tribenuron methyl on biomass productivity and amino acids content in weeds

2014

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Pot experiments were carried out in controlled environment chambers to investigate the influence of climatic factors and application methods on tribenuron methyl activity on three weed species: Anthemis arvensis, Galium aparine and Stellaria media. Tribenuron methyl was used at a dose of 15 g a.i. ha -1 solo or in mixture with a surfactant. Herbicide activity was subjected to the influence of environmental conditions such as: air temperature (25/16°C and 8/2°C day/night), relative humidity (75% and 50%) and soil moisture (60% and 30%). Herbicide efficacy was evaluated on fresh weight and reduction in free branched-chain amino acids content. The surfactant affected tribenuron methyl efficacy differently, depending on the environmental conditions and weed species susceptibility. Control of S. media did not require addition of a surfactant to achieve a high efficacy. The joint application enhanced herbicide efficacy against A. arvensis compared to solo application under low relative humidity (RH). Galium aparine was satisfactory controlled only when the surfactant was added to the spray solution, even under optimal environmental conditions. In most cases the amino acids content declined after exposure to tribenuron methyl and tank mix with the surfactant further improved its reduction. Increased amino acid content was observed in G. aparine and A. arvensis exposed to low soil moisture and G. aparine exposed to 50% RH, probably due to amino acids overproduction as a response to environmental conditions.

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Efficacy and metabolism of MON 37500 inTriticum aestivumand weedy grass species as affected by temperature and soil moisture

Cited by 67 publications

References 29 publications

An Innovative Method to Evaluate the Impact of Temperature on Iodosulfuron-Methyl Selectivity to Oat Crop

An Innovative Method to Evaluate the Impact of Temperature on Iodosulfuron-Methyl Selectivity to Oat Crop

Winter wheat (Triticum aestivum L.) response to herbicides as affected by application timing and temperature

Influence of selected soil-climatic parameters and application method of tribenuron methyl on biomass productivity and amino acids content in weeds

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