MON 37500 application timing affects cheat (Bromus secalinus) control and winter wheat

Kelley, Jason P.; Peeper, Thomas F.

doi:10.1614/0043-1745(2003)051[0231:matacb]2.0.co;2

Cited by 17 publications

(20 citation statements)

References 8 publications

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“…At this time, the growth stage of the plants was Z21 to Z29. This is comparable with previous studies' application times, and confirms the tolerance of winter wheat to herbicides at this stage (Kelley and Peeper 2003;Hoskins et al 2005;Sikkema et al 2007). At this timing, the treatment of dicamba/MCPA/mecoprop consistently injured winter wheat and resulted in yield reductions at two locations in 2010.…”

Section: Discussionsupporting

confidence: 88%

“…contrast to some studies done in fields with different herbicides applied under cold weather. Grey et al (2012), Hoskins et al (2005) and Kelley and Peeper (2003) all reported winter wheat injury when the herbicides were applied in cold conditions compared with warmer temperatures. These contrasting results could be due to the type of herbicides used, the air temperature and the growth stage of winter wheat at the time of application.…”

Section: Discussionmentioning

confidence: 99%

“…For example, Hoskins et al (2005) looked at the effect of some post-emergence herbicides on ryegrass and wheat and noted greater injury when air temperature at the time of application was 78C instead of 168C. In addition, Kelley and Peeper (2003) observed frequent wheat injury with low air temperature when sulfosufuron was applied early post-emergence in contrast to a late application. Although these studies provide valuable information they do not comment on winter wheat response to herbicides applied in near frost conditions.…”

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confidence: 99%

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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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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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

et al. 2015

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“…Few managerial options exist to selectively control undesirable grasses without negatively impacting desirable perennial grasses. Sulfosulfuron (1-(2-ethylsulfonylimidazo [1,2-alpyridin -3-ylsulfonyl)-3-(4,6-dimethoxypyrimidin-2-yl)urea) is a sulfonylurea herbicide that has been shown to selectively control the winter annuals downy brome (Bromus tectorum L.) (Geier et al 1998, Olsen et al 2000 and cheat (Bromus secalinus L.) (Kelley and Peeper 2003) and the troublesome rhizomatous pasture grasses quackgrass (Elytrigia repens L. Nevski) (Hageman et al 1996) and johnsongrass (Sorghum halepense L. Pers.)…”

Section: Rhizomatous Grasses Generally Experienced Greater Damage Frommentioning

confidence: 99%

Contrasting Responses of Intermountain West Grasses to Soil Nitrogen

Monaco¹,

Johnson²,

Norton³

et al. 2003

Journal of Range Management

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Condujimos experimentos en invernadero para comparar las respuestas fotosintéticas y de crecimiento de dos zacates anuales invasores ( "Downy brome" = Bromus tectorum L. y"Medusahead" = Taeniatherum caput-medusae (L.) [Nevski]), 6 zacates cespitosos y 7 zacates rizomatosos a la aplicación del her bicida sulfosulfuron (1 -(2-ethylsulfonylimidazo [1,2 -a]pyridin -3 ylsulfonyl)-3-( 4, 6-dimethoxypyrimidin -2-yl)urea). Nuestros obje tivos fueron identificar patrones generales de respuesta de las especies y probar la hipótesis de que el sulfosulfuron indujo una reducción de la actividad fotosintética y que el crecimiento de los tallos sería mas pronunciado en plantas pequeñas en relación a plantas grandes. Las plantas pequeñas se trataron con sulfosul furon (70 g ai ha') en un experimento realizado en primavera las grandes en uno efectuado en verano. " Wildryes" y " Bromes" fueron consistentemente dañados, mientras que 5 de los "Wheatgrasses "no fueron susceptibles al sulfosulfuron. Los zacates rizomatosos generalmente experimentaron mas daño por el sulfosulfuron que los zacates cespitosos. Estos resultados sug ieren que el sulfosulfuron podría ser una herramienta útil de manejo de pastizales para controlar las especies invasoras no deseadas de zacates anuales sin afectar significativamente el crecimiento y fisiología de los zacates deseables del pastizal. r ange grasses AbstractWe conducted greenhouse experiments to compare photosynthetic and growth responses of 2 invasive annual grasses (downy brome = Bromus tectorum L. and medusahead = Taeniatherum caput-medusae (L.) [Nevski]), 6 caespitose grasses, and 7 rhizomatous grasses to the herbicide sulfosulfuron (1-(2-ethylsul-idin-2-yl)urea). Our objectives were to identify general patterns of species responsiveness and test the hypothesis that sulfosulfuron induced reduction in photosynthetic activity and shoot growth would be more pronounced in small relative to larger plants. Small plants in a spring experiment and large plants in a summer experiment were treated with sulfosulfuron (70 g ai ha'). Wildryes and bromes were consistently injured; whereas, 5 of the 7 wheatgrasses were not susceptible to sulfosulfuron. Rhizomatous grasses generally experienced greater damage fromThese results suggest that sulfosulfuron would provide a useful rangeland management tool to control unwanted invasive annual grasses without significantly hindering growth and physiology of desirable rangeland grasses.

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“…Inadequate or delayed precipitation can reduce herbicide effectiveness and decrease weed control [1,4,11,[21][22][23]. Depending on soil type, high amounts of precipitation (i.e.…”

Section: Introductionmentioning

confidence: 99%

Precipitation Influences Pre- and Post-Emergence Herbicide Efficacy in Corn

Stewart¹,

Soltani²,

Nurse³

et al. 2012

AJPS

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Selecting a preemergence (PRE) and postemergence (POST) herbicide program that has the greatest efficacy can be difficult for corn producers and is highly dependent on weed spectrum. Weather conditions before and after herbicide application can further complicate decisions because they influence herbicide efficacy. Eleven field trials were conducted at three locations in Southwestern Ontario from 2003 to 2006, to determine the most effective PRE and POST corn herbicides for weed control. The most abundant weed species across all locations were redroot pigweed (Amaranthus retroflexus L.), common ragweed (Ambrosia artemisiifolia L.), common lambsquarters (Chenopodium album L.), and green foxtail (Setaria viridis (L.) Beauv.). Nine PRE herbicide treatments and eleven POST (applied at the 3 -4 leaf stage of corn) herbicide treatments were tested. Results from this study suggest that the timing and amount of precipitation influence herbicide efficacy. For example, precipitation levels 0 -17 mm within seven days after herbicide application (PRE or POST) provided unacceptable weed control in treatments that included atrazine, dimethenamid-p, isoxaflutole/atrazine or S-metolachlor/benoxacor. Cumulative precipitation during the 14 days after PRE application that exceeded the monthly average (by at least 64%) reduced Setaria viridis control with pendimethalin. This study demonstrates that a better understanding of how environmental conditions, especially precipitation affect herbicide efficacy, need to be considered by growers when selecting a corn herbicide program to reduce the possibility of weed control failure.

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MON 37500 application timing affects cheat (Bromus secalinus) control and winter wheat

Cited by 17 publications

References 8 publications

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

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

Contrasting Responses of Intermountain West Grasses to Soil Nitrogen

Precipitation Influences Pre- and Post-Emergence Herbicide Efficacy in Corn

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