Efficacy and Safening of Aryloxyphenoxypropionate Herbicides when Tank-Mixed with Triclopyr for Bermudagrass Control in Zoysiagrass Turf

Lewis, Dustin F.; McElroy, J. Scott; Sorochan, John C.; Mueller, Thomas C.; Samples, Thomas J.; Breeden, Gregory K.

doi:10.1614/wt-d-10-00029.1

Cited by 29 publications

(67 citation statements)

References 16 publications

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“…Visual hybrid bermudagrass injury data were more closely correlated to assessments of turfgrass cover on all dates; additionally, the greatest degree of association was observed in data collected 3 WAT regardless of parameter. These findings support those of Lewis et al (2010) and Yelverton et al (2009), who also observed no advantages in using DIA in place of visual ratings for assessing herbicide responses in turf.…”

Section: Resultssupporting

confidence: 90%

Soil Type and Rooting Depth Affect Hybrid Bermudagrass Injury with Preemergence Herbicides

et al. 2013

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Applications of preemergence (PRE) herbicides can injure hybrid bermudagrass [C. dactylon (L.) Pers. × C. transvaalensis Burtt‐Davy]. Research was conducted to determine the effects of soil texture and rooting depth on hybrid bermudagrass injury with two PRE herbicides. Washed ‘Tifway’ hybrid bermudagrass sod was established in mini‐rhizotrons. Treatments included the factorial combination of two soils (sand, silt loam), four herbicides (indaziflam at 35, 52.5, and 70 g ha−1 and prodiamine at 840 g ha−1), and three rooting depths (5, 10, and 15 cm). Averaged across both soils, foliar injury and reductions in root‐length density were greatest at rooting depths ≤15 cm. In a sand rootzone with no organic matter, significant foliar injury (23 to 48%) was observed with indaziflam; however, foliar injury with prodiamine measured ≤7%. In the silt loam rootzone, injury measured 0 to 17% with all herbicides. Data indicate that soil type and rooting depth affect hybrid bermudagrass injury with indaziflam; however, additional research is needed to determine if these glasshouse responses will be similar under field conditions. Differential effects on root function, as well as soil biological, chemical, and physical properties may also affect injury potential with indaziflam and prodiamine applications in sand rootzones. Additional research is needed to explore the effects of indaziflam and prodiamine on hybrid bermudagrass root physiological function in further detail.

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Section: Resultssupporting

confidence: 90%

Soil Type and Rooting Depth Affect Hybrid Bermudagrass Injury with Preemergence Herbicides

et al. 2013

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“…For example, this might be the case when maintaining a more tolerant cultivar such as Geo zoysiagrass, or when short‐term injury or reductions in quality are not a major concern, such as on a sod farm. However, it is noteworthy that besides injury reduction, triclopyr as a broadleaf herbicide also broadens the weed control spectrum of a single application; moreover, mixtures of triclopyr with certain AOPP herbicides including fluazifop‐P‐butyl have been found to improve bermudagrass suppression compared with using an AOPP herbicide alone (McElroy and Breeden, 2006; Doroh et al, 2010; Lewis et al, 2010). Brosnan et al (2011) reported early spring and fall to be the seasons during which greatest bermudagrass injury was observed and proposed that greater absorption and translocation rates may be the cause.…”

Section: Discussionmentioning

confidence: 99%

“…Variations in response to triclopyr alone could be cultivar specific, as zoysiagrass cultivars have demonstrated diversity regarding herbicide susceptibility and recovery rate (Flessner et al, 2011b; Leon et al, 2014). For example, within Z. matrella , ‘Diamond’ is highly susceptible to AOPP herbicides, and triclopyr does not exhibit a safening effect (Lewis et al, 2010). Conversely, as shown here, Zeon is also susceptible, but exhibited a clear safening response to triclopyr.…”

Section: Discussionmentioning

confidence: 99%

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Application Timing Affects Tolerance of Zoysiagrass to Fluazifop‐P‐butyl and Safening Effect of Triclopyr

et al. 2019

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1789 RESEARCH Z oysiagrass (Zoysia spp.) is a warm-season turfgrass widely adopted in the transitional zone and southeastern regions of the United States due to good turf quality and low nutrient input requirements. Zoysiagrass exhibits more shade and winterkill tolerance than bermudagrass (Cynodon spp.), fewer disease and insect problems than St. Augustinegrass [Stenotaphrum secundatum (Walter) Kuntze], and moderate salinity tolerance and wear tolerance compared with other warm-season grasses (Patton, 2010;Patton et al., 2017a). The most troublesome weeds in zoysiagrass turf are frequently other warm-season grasses with a similar growth habit and growing season. For example, bermudagrass is often one of the most problematic weeds to control, especially for golf courses during the process of transitioning from bermudagrass to zoysiagrass fairways ( Johnson, 1992). Use of nonselective herbicides for long-term bermudagrass control is usually not practical and can be costly, since bermudagrass will eventually regrow from rhizomes and compete with the zoysiagrass ( Johnson and Carrow, 1995). The aryloxyphenoxyproponiate (AOPP) herbicide fluazifop-P-butyl is labeled for bermudagrass suppression in zoysiagrass; however, previous studies reported significant injury to zoysiagrass despite nearly 100% control of bermudagrass ( Johnson, 1987). Finding ways to increase the rate of AOPP ABSTRACT Aryloxyphenoxypropionate (AOPP) herbicides, such as fluazifop-P-butyl, can be used for postemergence control of grassy weeds in zoysiagrass (Zoysia spp.), although the turf might suffer transient injury. This injury can be reduced by tank mixing fluazifop-P-butyl with triclopyr, an herbicide that behaves as a safener for AOPP herbicides. To characterize seasonal variation in zoysiagrass injury caused by fluazifop-P-butyl and triclopyr applications, we conducted a 2-yr study on three Zoysia spp. cultivars ('Empire', 'Geo', and 'Zeon') at Jay, FL, from August 2015 to April 2017, evaluating how injury and turf quality were affected after spring, summer, and fall applications. The level of injury and changes in turf quality were influenced by fluazifop-Pbutyl application timing, but the most sensitive season varied with the cultivar. The seasons with the greatest injury were also the ones in which the safening activity of triclopyr was most effective. In addition, when triclopyr was applied with fluazifop-P-butyl, the quality of all evaluated cultivars recovered to the level of nontreated controls by 2 wk after treatment. Nonstructural carbohydrate content was not affected by herbicide applications, but there were major differences in glucose and starch content between above-and belowground tissue depending on cultivar and season. Overall, our study confirmed that tank mixing triclopyr can reduce fluazifop-P-butyl phytotoxicity in zoysiagrass, and in the case of relatively tolerant cultivars, it might allow the use of rates higher than the current labeled rate with little negative impact on turf quality while providing better control of ...

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“…However, triclopyr, a pyrimidine carboxylic acid herbicide, can increase zoysiagrass (Zoysia japonica Steud.) tolerance to AOPP herbicides (Doroh et al 2010;Lewis et al 2010;McElroy and Breeden 2006).…”

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confidence: 99%

Influence of Herbicide Safeners on Creeping Bentgrass (Agrostis stolonifera) Tolerance to Herbicides

et al. 2015

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Glasshouse research was conducted to investigate the efficacy of herbicide safeners for improving creeping bentgrass (CBG) tolerance to various herbicides. CBG injury from amicarbazone (150 g ha−1), bispyribac-sodium (110 g ha−1), fenoxaprop-p-ethyl (35 g ha−1), imazapic (45 g ha−1), quinclorac (1,050 g ha−1), or topramezone (37 g ha−1) applied in combination with the herbicide safeners naphthalic anhydride or isoxadifen-ethyl was evaluated. These safeners reduced CBG injury from topramezone only. Topramezone was then applied in combination with naphthalic anhydride, isoxadifen-ethyl, cloquintocet-mexyl (cloquintocet), fenchlorazole-ethyl, mefenpyr-diethyl, and benoxacor. These experiments determined that CBG injury was lowest from topramezone in combination with cloquintocet. Additional experiments evaluated topramezone (37 g ha−1) with several rates of cloquintocet and determined that applications at ≥ 28 g ha−1reduced CBG injury similarly. Cloquintocet (28 g ha−1) increased topramezone I50values against CBG, but not large crabgrass or goosegrass. The cytochrome P450 (cP450) inhibitor malathion (1000 g ha−1) reduced topramezone I50values against CBG in one experimental run. Topramezone–cloquintocet combinations warrant further research in field settings.

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Efficacy and Safening of Aryloxyphenoxypropionate Herbicides when Tank-Mixed with Triclopyr for Bermudagrass Control in Zoysiagrass Turf

Cited by 29 publications

References 16 publications

Soil Type and Rooting Depth Affect Hybrid Bermudagrass Injury with Preemergence Herbicides

Soil Type and Rooting Depth Affect Hybrid Bermudagrass Injury with Preemergence Herbicides

Application Timing Affects Tolerance of Zoysiagrass to Fluazifop‐P‐butyl and Safening Effect of Triclopyr

Influence of Herbicide Safeners on Creeping Bentgrass (Agrostis stolonifera) Tolerance to Herbicides

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