Triclopyr Safens the Use of Fluazifop and Fenoxaprop on Zoysiagrass While Maintaining Bermudagrass Suppression

McElroy, J. Scott; Breeden, Gregory K.

doi:10.1094/ats-2006-0502-01-rs

Cited by 27 publications

(55 citation statements)

References 5 publications

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“…For example, triclopyr is only labeled for cool-season grasses and zoysiagrass (Zoysia japonica Steud.) because of excessive injury potential from labeled use rates (0.28 to 1.12 kg ha −1 ) on most warm-season species during active growth (Cudney et al 1997;McElroy and Breeden 2006). Glyphosate was less efficacious than triclopyr at rates evaluated and would be limited to spot applications for POST control of spotted spurge.…”

Section: Resultsmentioning

confidence: 99%

ALS-Resistant Spotted Spurge (Chamaesyce maculata) Confirmed in Georgia

McCullough

McElroy

et al. 2016

Weed sci.

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Metsulfuron is used for POST control of spotted spurge in many warm-season turfgrasses. A suspected resistant (R) biotype of spotted spurge was collected from turfgrass in Georgia with a history of exclusive metsulfuron use. Research was conducted to evaluate the resistance level of this biotype to metsulfuron, efficacy of other mechanisms of action for control, and the molecular basis for resistance. Compared with a susceptible (S) biotype, the R biotype required .90 and .135 times greater metsulfuron rates to reach 50% injury and reduce biomass 50% from the nontreated, respectively. The R biotype was also resistant to trifloxysulfuron but was injured equivalent to the S biotype from dicamba, glyphosate, and triclopyr. Gene sequencing of the R biotype revealed a Trp 574 to Leu substitution that has conferred resistance to acetolactate synthase (ALS) inhibitors in previous research. This is the first report of ALS resistance in spotted spurge. More importantly, this is the first report of a herbicide-resistant broadleaf weed from a turfgrass system in the United States. Nomenclature: Metsulfuron-methyl; spotted spurge, Chamaesyce maculata (L.) Small.

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Section: Resultsmentioning

confidence: 99%

ALS-Resistant Spotted Spurge (Chamaesyce maculata) Confirmed in Georgia

McCullough

McElroy

et al. 2016

Weed sci.

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“…As mentioned previously, bermudagrass is an invasive weed of seashore paspalum that is difficult to control once established. Herbicides commonly used to suppress or control bermudagrass include fluazifop, triclopyr, siduron, and ethofumesate (14,18,19). In the present study, all caused severe injury to seashore paspalum seedlings and do not appear to be viable options for use in controlling bermudagrass in seashore paspalum seedlings.…”

Section: Herbicide Injury On Seedling Sea Spray Seashore Paspalummentioning

confidence: 99%

Herbicide Tolerance on ‘Sea Spray’ Seashore Paspalum Seedlings

Patton

Trappe

Richardson

et al. 2009

Applied Turfgrass Science

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There are no reports of herbicide tolerance on seedling seashore paspalum (Paspalum vaginatum Sw.). The objective of this study was to determine which herbicides cause the least amount of injury to seashore paspalum seedlings and allow for maximum establishment. Field studies were conducted in 2007 and 2008 to assess the tolerance of ‘Sea Spray’ seashore paspalum to 23 herbicides. Herbicide treatments were applied two weeks after emergence of seedlings and compared to an untreated control. MSMA, imazaquin, fluazifop, triclopyr, siduron, and ethofumesate injured seedlings and reduced establishment. Clopyralid, halosulfuron, metsulfuron, quinclorac, carfentrazone, and salt water provided the least injury to seashore paspalum seedlings while allowing maximum establishment.

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“…On the following evaluations, there was no evolution of symptoms, which consisted of bleached leaves, and plants continued to grow and, at 42 DAA, no more signs of the initial symptoms were observed. McElroy and Breeden (2006) ) show the injuries were of 10% or bellow. Similar results were obtained by Lewis et al (2012).…”

Section: Itg5 -Imperial Grassmentioning

confidence: 95%

“…Some papers show triclopyr toxicity effect upon Cynodon species. McElroy and Breeden (2006) evaluating its effect at 1.23 kg a.e.ha clopyralid reducing soil cover about 56%, at 21 DAA and, these injuries were associated mainly by the herbicide triclopyr. Johnson and Duncan (2001) found that applications of triclopyr cause injuries around to 30% at 2 DAA.…”

Section: Bermuda Grassmentioning

confidence: 99%

Selectivity and efficiency of herbicides in warm season turfgrass varieties

Silva¹,

Cesarin²,

Martins³

et al. 2016

Afr. J. Agric. Res.

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Weed infestations and the few post-emergent control alternatives available are some of the main problems in the management of ornamental and sports lawns. Given the exposed, the study aims to evaluate the selectivity of five herbicides to four grass varieties: Paspalum notatum (bahia grass), Cynodon dactylon (bahama grass-ITG6), Zoysia japonica (japanese lawn grass) and Zoysia japonica (imperial -ITG5), as well as the control efficiency of those upon nutsedge (Cyperus rotundus) and sudan grass (Urochloa decumbens). The following herbicides were applied in the recommended doses: sulfentrazone + diuron, isoxaflutole, triclopyr, 2,4-D and halosulfuron. Visual phytotoxicity symptoms in turfgrass and weed control were performed at 7, 14, 21, 28, 35 and 42 days after herbicide application and, at the end of the evaluations, was quantified the dry weight. The herbicides sulfentrazone + diuron and isoxaflutole were not selective to any turfgrass, although sulfentrazone + diuron controlled C. rotundus and U. decumbens species and isoxaflutole controlled only U. decumbens. However, halosulfuron and 2,4-D herbicides were selective to all of grasses and promoted weed species control. The herbicide triclopyr was selective to P. notatum, Z. japonica and Z. japonica-ITG5, and it can be used to control C. rotundus and U. decumbens.

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Triclopyr Safens the Use of Fluazifop and Fenoxaprop on Zoysiagrass While Maintaining Bermudagrass Suppression

Cited by 27 publications

References 5 publications

ALS-Resistant Spotted Spurge (Chamaesyce maculata) Confirmed in Georgia

ALS-Resistant Spotted Spurge (Chamaesyce maculata) Confirmed in Georgia

Herbicide Tolerance on ‘Sea Spray’ Seashore Paspalum Seedlings

Selectivity and efficiency of herbicides in warm season turfgrass varieties

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