Downy Brome (<i>Bromus tectorum</i>) Control with Diclofop in Winter Wheat (<i>Triticum aestivum</i>)

Stahlman, Phillip W.

doi:10.1017/s0043174500058513

Cited by 9 publications

(4 citation statements)

References 13 publications

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“…Winter wheat yields in the central Great Plains were reduced 10,15, and 20% by 20,40, and 65 downy brome plants per m 2 , respectively (13). Moder ate levels of downy brome control in winter wheat have been reported for chlorsulfuron { (2- (12), metribuzin [4amino-6-( 1,1 -dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4//)-one] (14), and the ethylthio analog of metri buzin (10). Downy brome control in conservation-fallow systems in western Canada was 80 to 90% with glyphosate, paraquat (l,rdimethyl-4,4'-bipyridinium ion), quizalo fop, sethoxydim {2-[l-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-l-one}, and a gly phosate + 2,4-D mixture (2).…”

Section: Introductionmentioning

confidence: 98%

Downy Brome (Bromus tectorum), Jointed Goatgrass (Aegilops cylindrica) and Horseweed (Conyza canadensis) Control in Fallow

Wiese¹,

Salisbury²,

Bean³

1995

Weed technol.

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Jointed goatgrass, downy brome, and horseweed are increasingly troublesome winter annual weeds during fallow periods in conservation-tillage systems in the southern Great Plains. These experiments determined the optimum weed size, vigor, and minimum herbicide rate required for 95% or better control of these weeds on fallow land. Jointed goatgrass and downy brome were controlled best when plants were 10 cm or less tall and growing vigorously at time of treatment. Horseweed was controlled best when plants were 30 cm tall and growing vigorously. Based on local retail and application costs and assuming optimum conditions for control, the two most economical herbicide treatments that controlled each weed 95% or better were: jointed goatgrass, clethodim at 250 g ai/ha and glyphosate + 2,4-D at 249 + 479 g ae/ha; downy brome, quizalofop at 18 g ai/ha and glyphosate + 2,4-D at 582 + 950 g ae/ha; and horseweed, 2,4-D at 560 g ae/ha and metsulfuron at 5 g ai/ha.

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Section: Introductionmentioning

confidence: 98%

Downy Brome (Bromus tectorum), Jointed Goatgrass (Aegilops cylindrica) and Horseweed (Conyza canadensis) Control in Fallow

Wiese¹,

Salisbury²,

Bean³

1995

Weed technol.

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“…When downy brome plants were removed from winter wheat by early March, a 6% yield reduction occurred, but each month's delay in removal from March to June reduced wheat yield an additional 9 to 12% (12). Control (89%) of greater than 175 downy brome plants m2 resulted in 24% higher winter wheat grain yield in Kansas (14).…”

Section: Introductionmentioning

confidence: 98%

“…Grower adoption of conservation tillage practices and semidwarf cultivars have increased and dispersed annual brome species in winter wheat (7,8,11,13). Downy brome densities of 100 to 200 plants m 2 are common and occasionally exceed 400 plants m 2 in winter wheat (12,13,14).…”

Section: Introductionmentioning

confidence: 99%

Downy Brome (Bromus tectorum) Interference and Economic Thresholds in Winter Wheat (Triticum aestivum)

Stahlman¹,

Miller²

1990

Weed sci.

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Densities up to 100 downy brome m2were established in winter wheat in southeastern Wyoming and west-central Kansas to quantify wheat yield loss from downy brome interference and to approximate economic threshold levels. A quadratic equation best described wheat yield loss as a function of weed density when downy brome emerged within 14 days after wheat emergence. Densities of 24, 40, and 65 downy brome m2reduced wheat yield by 10, 15, and 20%, respectively. Wheat yield was not reduced when downy brome emerged 21 or more days later than wheat. Economic thresholds varied with changes in downy brome density, cost of control, wheat price, and potential wheat yield. In a greenhouse experiment, dry weight of 72-day-old wheat plants grown in association with downy brome was not affected by the distance between the weeds and wheat, whereas downy brome plant dry weight increased with increasing distance between the weeds and wheat.

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“…Downy brome interference with winter wheat is well documented. Dense infestations (> 100 plants m-2 ) of downy brome have reduced winter wheat yields 21 to 92% (Rydrych 1974; Rydrych and Muzik 1968;Stahlman 1984). whereas downy brome densities of 24 to 65 plants m-2 reduced wheat yields 10 to 44% (Rydrych andMuzik 1968: Stahlman andMiller 1990).…”

mentioning

confidence: 99%

MON 37500 rate and timing affects downy brome (Bromus tectorum) control in winter wheat (Triticum aestivum)

Geier

Stahlman²,

Northam³

et al. 1998

Weed sci.

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Field experiments were conducted at five locations in Colorado, Kansas, and Wyoming in 1994–1995 and 1995–1996 to compare the effects of MON 37500 rate and application timings on downy brome control and winter wheat tolerance. MON 37500 at 18 to 35 g ha−1applied preemergence or fall postemergence reduced downy brome density 71 to 92% in 1995. Spring-applied MON 37500 suppressed downy brome growth but did not reduce plant density. No application reduced downy brome density in 1996. At each location, downy brome was controlled best by MON 37500 applied preemergence or fall postemergence at 35 g ha−1. MON 37500 did not affect wheat height at Archer or Torrington, WY, and Burlington or Stratton, CO, but wheat treated preemergence or fall postemergence was taller than untreated wheat at Hays, KS, in 1995. Spring-postemergence-treated wheat at Hays in 1995 was shorter than untreated, preemergence-, or fall-postemergence-treated wheat. Wheat head density did not differ among treated and untreated plots at Torrington, but herbicide treatment increased wheat yields. Wheat head density increased with all MON 37500 treatments at Hays in 1995, as did yield. However, preemergence and fall-postemergence applications resulted in the highest wheat yields. No herbicide treatment affected head density or yield at Hays in 1996.

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Downy Brome (Bromus tectorum) Control with Diclofop in Winter Wheat (Triticum aestivum)

Cited by 9 publications

References 13 publications

Downy Brome (Bromus tectorum), Jointed Goatgrass (Aegilops cylindrica) and Horseweed (Conyza canadensis) Control in Fallow

Downy Brome (Bromus tectorum), Jointed Goatgrass (Aegilops cylindrica) and Horseweed (Conyza canadensis) Control in Fallow

Downy Brome (Bromus tectorum) Interference and Economic Thresholds in Winter Wheat (Triticum aestivum)

MON 37500 rate and timing affects downy brome (Bromus tectorum) control in winter wheat (Triticum aestivum)

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