Yellow Nutsedge (<i>Cyperus esculentus</i>) and Large Crabgrass (<i>Digitaria sanguinalis</i>) Response to Soil- and Foliar-Applied Mesotrione

McCurdy, James D.; McElroy, J. Scott; Breeden, Gregory K.

doi:10.1614/wt-08-068.1

Cited by 8 publications

(8 citation statements)

References 14 publications

(18 reference statements)

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“…Overhead irrigation was withheld for 3 DAT. These methods are similar to previous experiments (McElroy et al 2004b;McCurdy et al 2009;Wehtje and Walker 2002;Williams et al 2003).…”

Section: Methodssupporting

confidence: 85%

Methiozolin Absorption and Translocation in Annual Bluegrass (Poa annua)

2013

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Annual bluegrass is a problematic turfgrass weed. Methiozolin is a new, currently unregistered herbicide that selectively controls annual bluegrass in desirable turfgrasses. Studies were conducted to evaluate and compare annual bluegrass control from PRE-applied methiozolin as influenced by rate and soil type and from POST-applied methiozolin as influenced by rate, soil type, annual bluegrass growth stage, and treatment placement. Studies were also conducted to evaluate foliar and root absorption and subsequent translocation of methiozolin by annual bluegrass using radio-tracer techniques. PRE-applied methiozolin controlled annual bluegrass > 99%. POST-applied methiozolin resulted in < 80% control regardless of foliar versus root exposure. POST applications are more effective at higher rates and smaller growth stages. Foliar-plus-soil methiozolin application trended to result in the best control, compared to foliar-only and soil-only applications. Absorption and translocation data indicate that methiozolin is absorbed by both leaves and roots and moderately translocates upward in the plant toward the leaf tip with little to no basipetal translocation. Because control is limited from a single methiozolin application (as observed in POST experiments), successful field application of methiozolin requires multiple and timely applications directed toward the roots and/or foliage of annual bluegrass.

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“…Overhead irrigation was withheld for 3 DAT. These methods are similar to previous experiments (McElroy et al 2004b;McCurdy et al 2009;Wehtje and Walker 2002;Williams et al 2003).…”

Section: Methodssupporting

confidence: 85%

Methiozolin Absorption and Translocation in Annual Bluegrass (Poa annua)

2013

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“…Mesotrione was the only herbicide to exhibit some control of yellow nutsedge, with £4 plants per plot in 2011 ( Table 2). Both PRE and POST control of yellow nutsedge from mesotrione have been previously reported by McCurdy et al (17). Sequential applications were evaluated in our studies and were effective on yellow nutsedge, which coincides with Dernoeden and Fu's (11) research indicating improved control of yellow nutsedge over the untreated plots with sequential applications (PRE and early POST) of mesotrione compared to single applications.…”

Section: Effects Of Sequential Herbicide Applications On Tall Fescue supporting

confidence: 89%

Weed Control and Turf Safety of Single and Sequential Applications of Herbicides Over Spring Seedings

Sousek

Gaussoin

Patton

et al. 2014

Applied Turfgrass Science

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Weed control is important during establishment of cool‐season grasses, especially when seeded in spring near summer annual weed germination. Our objectives were to determine (i) turf safety and weed control from sequential applications of newly‐released herbicides on tall fescue at three seeding dates (May, June, July) and (ii) turf safety and weed control from newly‐released herbicides applied at seeding or shortly after emergence of spring‐seeded Kentucky bluegrass or tall fescue. No herbicides tested negatively affected turfgrass establishment and usually improved turf establishment by reducing weed competition. Mesotrione consistently provided effective weed control and turf cover from either single or sequential applications over different locations, years, seeding dates, and turf species. Quinclorac or siduron applied as single or sequential applications or quinclorac+carfentrazone as a single application provided effective weed control and turf cover depending on seeding date and application regime. Although spring seeding can be achieved with high maintenance, it is strongly recommended to seed cool season grasses at the optimal time from late summer to early fall.

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“…Application of the broadleaf herbicides carfentrazone and DDM did not influence smooth crabgrass density, which increased from approximately 70 to 115 plants m À2 over a 12-wk period following study initiation (Figure 1a). Mesotrione is frequently used in cool-season turf as a standard for the control of crabgrass and as an alternative mode of action in broadleaf weed control (Beam et al 2006;Giese et al 2005;McCurdy et al 2009;Willis et al 2007); however, one mesotrione application at 280 g ai ha À1 did not effectively reduce mature smooth crabgrass density in this study, as it was not significantly different from carfentrazone or DDM (Figure 1a). Metamifop reduced smooth crabgrass density by 40 to 60 plants m À2 between 2 and 12 WAT (Figure 1b).…”

Section: Resultsmentioning

confidence: 57%

Metamifop Rates, Application Timings, and Broadleaf Herbicide Admixtures Affect Smooth Crabgrass Control in Turf

Cox

Askew

2014

Weed technol.

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Metamifop is an aryloxyphenoxypropionate herbicide under evaluation in the United States for annual grass control in cool-season turfgrasses. Insufficient information is available on the most effective metamifop application timings and mixtures for POST smooth crabgrass control. Field trials conducted in Blacksburg, VA, evaluated metamifop for smooth crabgrass control in existing stands of perennial ryegrass, Kentucky bluegrass, and tall fescue at three rates compared to fenoxaprop, metamifop applied twice at three application intervals, and metamifop in combination with the broadleaf herbicides carfentrazone, 2,4-D plus dicamba plus mecoprop (DDM), and mesotrione. Smooth crabgrass control was equivalent with metamifop at 400 g ai ha−1and fenoxaprop at 195 g ai ha−1. Smooth crabgrass cover was 2% or less, 12 wk after initial treatment, when treated twice with metamifop (300 g ha−1) at a 3-, 6-, or 8-wk interval and significantly better than metamifop applied once. Smooth crabgrass cover was significantly greater at every assessment date in plots treated with metamifop plus DDM than all other metamifop plus broadleaf herbicide admixtures. Metamifop did not appear to significantly injure any turfgrass in these studies, but conclusions about metamifop safety to cool-season turfgrasses cannot be made from these studies due to nonreplication of turfgrass species. According to these data, metamifop is an effective herbicide for controlling smooth crabgrass in cool-season turfgrasses when applied once at 300 or 400 g ha−1or twice at a 3-, 6-, or 8-wk interval. Although metamifop continues to control smooth crabgrass when added to some broadleaf herbicides, smooth crabgrass control was reduced when metamifop was combined with DDM.

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Yellow Nutsedge (Cyperus esculentus) and Large Crabgrass (Digitaria sanguinalis) Response to Soil- and Foliar-Applied Mesotrione

Cited by 8 publications

References 14 publications

Methiozolin Absorption and Translocation in Annual Bluegrass (Poa annua)

Methiozolin Absorption and Translocation in Annual Bluegrass (Poa annua)

Weed Control and Turf Safety of Single and Sequential Applications of Herbicides Over Spring Seedings

Metamifop Rates, Application Timings, and Broadleaf Herbicide Admixtures Affect Smooth Crabgrass Control in Turf

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