Spring Cereal Response to Imazamethabenz and Fenoxaprop-p-ethyl as Influenced by Environment

Xie, Haisheng S.; Hsiao, A. I.

doi:10.1017/s0890037x00028566

Cited by 9 publications

(9 citation statements)

References 16 publications

(3 reference statements)

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“…Four environmental regimes were established as follows (Xie et al 1994c). (1) the non-stressed (standard) regime was 20/15~ full light (400 ixE/m2/s) with a 16-h photoperiod, daily watering.…”

Section: General Proceduresmentioning

confidence: 99%

Influence of temperature and light intensity on absorption, translocation, and phytotoxicity of fenoxaprop-ethyl and imazamethabenz-methyl in Avena fatua

Xie

Hsiao

1996

J Plant Growth Regul

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The absorption and translocation of fenoxaprop-ethyl and imazamethabenz-methyl were investigated in wild oat (Avena fatua L.) plants grown under different temperature and light intensity conditions by using ~4C tracer techniques. The phytotoxicity of both herbicides, applied as individual droplets, was also determined under similar environments. The absorption of fenoxaprop-ethyl and imazamethabenz-methyl was increased by high temperature (30/20~ and to a lesser extent by 70% shading; low temperature (10/5~ had limited effect on the absorption. The basipetal translocation of fenoxaprop-ethyl was not affected by high temperature, and the increase in imazamethabenz-methyl translocation at high temperature was likely the result of the increased absorption. Low temperature decreased total translocation and translocation efficiency in both fenoxaprop-ethyl and imazamethabenz-methyl. Low light intensity tended to reduce the efficiency of basipetal translocation of both herbicides. Fenoxaprop-ethyl phytotoxicity was reduced by high temperature but not by low temperature. Temperature had little effect on imazamethabenz-methyl effectiveness. Under 70% shading, the phytotoxicity of both herbicides was enhanced.

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Section: General Proceduresmentioning

confidence: 99%

Influence of temperature and light intensity on absorption, translocation, and phytotoxicity of fenoxaprop-ethyl and imazamethabenz-methyl in Avena fatua

Xie

Hsiao

1996

J Plant Growth Regul

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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. While providing interesting results, information from growth room/cabinet studies may not be transferable to field conditions.…”

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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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“…Husn. ], spring barley (Horduem vulgare L.) and spring wheat [16]. Reference [17] evaluated durum wheat sensitivity to various POST herbicides and found that injury of 3.4% to 4.9% and 1.9% to 8.0% was present 1 WAA when fenoxaprop-p-ethyl/safener was applied at a 1X and 2X rates, respectively.…”

Section: Resultsmentioning

confidence: 99%

Responses of Four Types of Winter Wheat to Fenoxaprop-p-ethyl

Belfry¹,

Sikkema²

2015

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Fenoxaprop-p-ethyl is a selective grass herbicide that if registered will provide winter wheat growers with an additional weed control option. Field experiments were established in the fall of 2011, 2012 and 2013 at Ridgetown and Exeter, Ontario, to determine the sensitivity of four market classes of winter wheat [Soft white winter wheat (SWWW), soft red winter wheat (SRWW), hard white winter wheat (HWWW) and hard red winter wheat (HRWW)] to 1X and 2X fenoxaprop-p-ethyl/safener at early-(EPOST) or late-post emergence (LPOST) application timings. Fenoxaprop-p-ethyl/safener applied LPOST at 1X and 2X the manufacturer's proposed label rate caused 4% and 5% injury 1 week after application (WAA), respectively. The injury observed was transient with 1% injury 2 WAA. Winter wheat height ranged from 91 to 95, 76 to 77, 76 to 79 and 90 to 93 cm while grain yield was 6.2 to 6.4, 6.1 to 7.1, 5.5 to 5.8 and 5.6 to 6.2 t·ha −1 for SWWW, SRWW, HRWW and HRWW, respectively. Exeter sites were not affected by fenoxaprop-p-ethyl/ safener treatment. At Ridgetown and Exeter, no market class-specific response was identified for the cultivars evaluated. Based on this study, fenoxaprop-p-ethyl/safener has the potential to cause only minor and transient injury in winter wheat that will not decrease yield. Furthermore, this research supports the registration of fenoxaprop-p-ethyl/safener for spring POST application in winter wheat in Ontario.

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Spring Cereal Response to Imazamethabenz and Fenoxaprop-p-ethyl as Influenced by Environment

Cited by 9 publications

References 16 publications

Influence of temperature and light intensity on absorption, translocation, and phytotoxicity of fenoxaprop-ethyl and imazamethabenz-methyl in Avena fatua

Influence of temperature and light intensity on absorption, translocation, and phytotoxicity of fenoxaprop-ethyl and imazamethabenz-methyl in Avena fatua

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

Responses of Four Types of Winter Wheat to Fenoxaprop-p-ethyl

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