Corn (<i>Zea mays</i>L.) Response to Trifloxysulfuron

Porterfield, Dunk; Wilcut, John W.

doi:10.1614/wt-04-315r.1

Cited by 4 publications

(4 citation statements)

References 30 publications

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“…In 2009, 'Honey Select' sweet corn was used and seemed to have enhanced injury response to the herbicides when compared to the field corn in 2008. Although trifloxysulfuron sodium has been shown to injure field corn in other studies (Porterfield & Wilcut, 2006), sweet corn has been shown to be more sensitive to herbicides when compared to field corn for several herbicides (Robinson, Monks, Schultheis, & Worsham, 1993;O'Sullivan, Zandstra, & Sikkema, 2002;Cavalieri et al, 2008;Nordby, Williams, Pataky, Riechers, & Lutz, 2008;Pataky, Meyer, Bollman, Boerboom, & Williams, 2008). Williams and Pataky (2010) reported that, despite a common genetic basis for herbicide metabolism, genotypic classes of sweet corn hybrids did not have identical field responses to 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors herbicides, post-emergency application.…”

Section: Bioassaymentioning

confidence: 99%

“…Since trifloxysulfuron sodium is most similar to flazasulfuron among herbicides used in turfgrass, it seems prudent to compare mobility of flazasulfuron with that of trifloxysulfuron sodium (Grey & McCullough, 2012). Flazasulfuron rates reduced corn height in preliminary studies and trifloxysulfuron sodium injured corn in field trials (Porterfield & Wilcut, 2006), so corn was chosen as the bioassay species. Our objective was to assess drift of flazasulfuron and trifloxysulfuron sodium using EPA guidelines for application conditions that match label specifications for each herbicide.…”

Section: Introductionmentioning

confidence: 99%

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Field assessment of flazasulfuron and trifloxysulfuron sodium drift

Askew

Gonçalves

Jester³

2021

Intl Turfgrass Soc Res J

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Exposure of non-target species pesticide via drift is of concern to the United States Environmental Protection Agency (EPA) as evidenced by required buffer zones and language on labels regarding offsite exposure to endangered species. In 2008, flazasulfuron received a conditional registration that specified a 30-m nontreated buffer between treated areas and sensitive plants. This buffer would make most intended uses of flazasulfuron in warm-season turfgrass impossible. Assessment of drift in field conditions is required to replace model-predicted buffer restrictions. Studies were conducted to assess drift of flazasulfuron and a similar herbicide, trifloxysulfuron sodium, in field conditions using conventional turfgrass spray equipment and maximum boom height and minimum droplet size specified on product labels. Herbicides were applied perpendicular to a 6.4 to 9.7 km h −1 wind over 'Riviera' bermudagrass [Cynodon dactylon (L.) Pers.] turf and sentinel corn plants were placed at distances between 0 and 30.5 m downwind. A bioassay based on reduction of corn height growth rate and shoot biomass indicated trifloxysulfuron sodium and flazasulfuron reduced corn growth similarly but the magnitude of these effects were dependent on year. Year dependency was likely associated with differences in corn cultivars between years. Herbicide drift was not detected beyond 4.6 m downwind of any application. Upon reviewing these and other data, EPA approved a label modification for flazasulfuron that reduced the minimum buffer to 7.6 m.

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Section: Bioassaymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Field assessment of flazasulfuron and trifloxysulfuron sodium drift

Askew

Gonçalves

Jester³

2021

Intl Turfgrass Soc Res J

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“…Acetolactate synthase (ALS)‐inhibiting herbicides are widely used in many crops, because they are effective in controlling a broad spectrum of weed species at low use rates, resulting in reduced environmental chemical loading (Wilcut et al. , 1996; Wright & Penner, 1998; Porterfield & Wilcut, 2006), and are residual in the soils of Israel (pH, 7.5–8.4). Most sulfonylurea herbicides remain stable in the soil for several months and can carry over to rotational crops (Johnson et al.…”

Section: Introductionmentioning

confidence: 99%

“…Until the introduction of TFX, pyrithiobac was the only selective post‐emergence (POST) herbicide for annual broad‐leaved weed control that could be applied over the top in cotton and did not risk the yield (Culpepper et al. , 2000; Porterfield & Wilcut, 2006). Pyrithiobac and TFX are the only options for over the top POST application in tank mixtures for selective Cyperus rotundus L. (purple nutsedge) annual broad‐leaved weed control in non‐transgenic cotton cultivars.…”

Section: Introductionmentioning

confidence: 99%

Effects of long‐term irrigation with reclaimed wastewater on the efficacy and fate of trifloxysulfuron‐sodium in the soil

et al. 2012

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Dvorkin G, Manor M, Sibony M, Chefetz B & Rubin B (2012). Effects of long‐term irrigation with reclaimed wastewater on the efficacy and fate of trifloxysulfuron‐sodium in the soil. Weed Research.52, 441–448. Summary Long‐term irrigation with reclaimed wastewater (RWW) is known to affect the physical, chemical and biological properties of the receiving soil. The sulfonylurea herbicide trifloxysulfuron‐sodium (TFX), an acetolactate synthase inhibitor, is stable in the soil for several months and can carry over to rotational crops; however, its activity in RWW‐irrigated soils is much lower. In this study, we monitored the activity/dissipation of TFX applied on RWW‐irrigated soil. High weed infestation in the treated soil in field studies along with a decrease in the soil activity as determined with test plant was observed, suggesting fast dissipation of the herbicidal activity of TFX in the soil. Dose–response curves of Sorghum bicolor to TFX planted in RWW‐ and in fresh water‐irrigated soils showed higher and more significant damage for both shoots and roots with the fresh water‐irrigated soil. Sterilised RWW‐irrigated soil exhibited higher TFX activity versus non‐sterilised soil. This implies that reduction in TFX activity in RWW‐irrigated soil is probably affected by the microbial activity.

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Absorption, Translocation, and Metabolism of Foliar-applied Trifloxysulfuron in Tobacco

Troxler¹,

Fisher²,

Smith³

et al. 2007

Weed Technology

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Research was conducted to evaluate absorption, translocation, and metabolism of foliar-applied trifloxysulfuron in flue-cured tobacco. The majority of 14C-trifloxysulfuron was absorbed by 4 h, with an accumulation in the plant of 43% of the radioactivity after 72 h. Translocation of radioactivity did not significantly differ between harvest timings of 4 to 72 h after treatment. Not more than 4% of applied 14C-trifloxysulfuron moved out of the treated leaves of tobacco, whereas less than 1.9% accumulated in any one part. Tobacco metabolized 14C-trifloxysulfuron rapidly, with 60.9% of the absorbed herbicide remaining in the parent herbicide form 4 h after treatment, whereas only 12.1% remained after 72 h. These data suggest that limited absorption and translocation, as well as rapid metabolism, are the basis for tobacco tolerance to foliar-applied trifloxysulfuron and illustrate the potential safe and effective use of trifloxysulfuron in tobacco for POST weed control.

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Corn (Zea maysL.) Response to Trifloxysulfuron

Cited by 4 publications

References 30 publications

Field assessment of flazasulfuron and trifloxysulfuron sodium drift

Field assessment of flazasulfuron and trifloxysulfuron sodium drift

Effects of long‐term irrigation with reclaimed wastewater on the efficacy and fate of trifloxysulfuron‐sodium in the soil

Absorption, Translocation, and Metabolism of Foliar-applied Trifloxysulfuron in Tobacco

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