Quinclorac for Cheat (Bromus secalinus) Control in Winter Wheat (Triticum aestivum)

Thirteen field experiments were conducted to evaluate quinclorac for cheat control in hard red winter wheat. Cheat control with quinclorac was variable. Quinclorac at 560 and 1120 g a.i./ha applied to tillered wheat controlled cheat 93 to 100% at four sites. In contrast, pooled over four other experiments and four application times, quinclorac at 420 g/ha and 560 g/ha controlled cheat only 20 and 31%, respectively. Quinclorac at 420 g/ha plus chlorsulfuron:metsulfuron (5:1) at 35 g a.i./ha applied PRE increased wheat yield 28% at one of three sites. At two of these sites, averaged over chlorsulfuron:metsulfuron rates of 0, 18, and 35 g a.i./ha, quinclorac at 280 and 420 g/ha applied POST, increased wheat yield 32 to 112%. In two cultivar tolerance experiments, quinclorac treatments did not damage any cultivar. Pooled over cultivars, yields were increased 7 and 10% when quinclorac at 280 and 560 kg/ha was applied, respectively. In a greenhouse experiment, quinclorac plus dicamba or esfenvalerate consistently reduced the leaf area of cheat in a manner suggesting synergistic effects. Of eight adjuvants evaluated in a laboratory experiment, only quinclorac plus the adjuvant BCH 864 01S reduced cheat leaf area more than quinclorac alone.

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Evaluation of Registered Herbicides for Cheat (Bromus secalinus) Control in Winter Wheat (Triticum aestivum)

Weed Technology ◽

10.1017/s0890037x00041294 ◽

1997 ◽

Vol 11 (1) ◽

pp. 30-34

Author(s):

Jeffrey A. Koscelny ◽

Thomas F. Peeper

Keyword(s):

Triticum Aestivum ◽

Winter Wheat ◽

Field Experiments ◽

Wheat Yield ◽

Wheat Grain ◽

Grain Yields ◽

Bromus Secalinus ◽

Herbicide Treatments ◽

Early Fall

Seven field experiments were conducted in Oklahoma to compare efficacy and wheat response to currently registered cheat suppression or control herbicide treatments. Chlorsulfuron + metsulfuron premix (5:1 w/w) at 26 g ai/ha applied PRE controlled cheat 20 to 61%, increased wheat grain yields at two of seven locations, and decreased dockage due to cheat at five of seven locations. Chlorsulfuron + metsulfuron at 21 g/ha tank-mixed with metribuzin at 210 g/ha, applied early fall POST, controlled cheat 36 to 98% and increased wheat yield at four of seven locations. Metribuzin applied POST in the fall at 420 g/ha controlled cheat 56 to 98% and increased wheat yields at five of seven locations. Both POST treatments decreased dockage at all locations.

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Seeding Date, Seeding Rate, and Row Spacing Affect Wheat (Triticum aestivum) and Cheat (Bromus secalinus)

Weed Technology ◽

10.1017/s0890037x0003373x ◽

1991 ◽

Vol 5 (4) ◽

pp. 707-712 ◽

Cited By ~ 15

Author(s):

Jeffrey A. Koscelny ◽

Thomas F. Peeper ◽

John B. Solie ◽

Stanley G. Solomon

Keyword(s):

Triticum Aestivum ◽

Winter Wheat ◽

Field Experiments ◽

Wheat Yield ◽

Row Spacing ◽

Infestation Level ◽

Seeding Rate ◽

Seeding Date ◽

Bromus Secalinus ◽

Winter Wheat Yield

Field experiments were conducted in Oklahoma to determine the effects of winter wheat seeding date and cheat infestation level on cultural cheat control obtained by increasing winter wheat seeding rates and decreasing row spacing. Seeding rate and row spacing interactions influenced cheat density, biomass, or seed in harvested wheat (dockage) at two of three locations. Suppressive effects on cheat of increasing wheat seeding rates and reduced row spacings were greater in wheat seeded in September than later. At two other locations, increasing seeding rate from 67 to 101 kg ha–1or reducing row spacings from 22.5 to 15 cm increased winter wheat yield over a range of cheat infestation levels.

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AC Grandview winter wheat

Canadian Journal of Plant Science ◽

10.4141/p01-143 ◽

2002 ◽

Vol 82 (2) ◽

pp. 421-423

Author(s):

H. G. Nass ◽

G. A. Atlin ◽

C. A. Caldwell ◽

D. F. Walker

Keyword(s):

Triticum Aestivum ◽

Winter Wheat ◽

Wheat Yield ◽

Triticum Aestivum L ◽

High Yield ◽

Glume Blotch ◽

Hard Red Winter Wheat ◽

Winter Wheat Yield ◽

Cultivar Description ◽

Red Winter Wheat

AC Grandview, a hard red winter wheat (Triticum aestivum L.), is adapted to the Maritimes. It has shown high yield, good winter survival and moderate to good resistance to powdery mildew, septoria leaf and glume blotch and snow mold. Key words: Triticum aestivum, red winter wheat, yield, cultivar description

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Field Bindweed (Convolvulus arvensis) Control in Winter Wheat (Triticum aestivum) With Herbicides

Weed Technology ◽

10.1017/s0890037x00028335 ◽

1991 ◽

Vol 5 (2) ◽

pp. 411-415 ◽

Cited By ~ 4

Author(s):

David C. Heering ◽

Thomas F. Peeper

Keyword(s):

Triticum Aestivum ◽

Winter Wheat ◽

Grain Yield ◽

Field Experiments ◽

Herbicide Application ◽

Convolvulus Arvensis ◽

Hard Red Winter Wheat ◽

Field Bindweed ◽

Imidazolinone Herbicides ◽

Red Winter Wheat

Field experiments were conducted in Oklahoma to evaluate the effect of three imidazolinone herbicides and metsulfuron on established field bindweed and hard red winter wheat followcrops. Imazapyr at 280 g ai ha-1and imazethapyr at 560 g ai ha-1controlled field bindweed from 78 to 100% for 48 wk, but imazaquin at 560 g ai ha-1, metsulfuron at 17.5 g ai ha-1, and 2,4-D plus picloram at 1120 plus 280 g ae ha-1did not. Imidazolinone herbicides reduced forage and grain yield of wheat seeded 8 to 14 wk after herbicide application. Only imazapyr reduced grain yield of wheat seeded 15 mo after treatment.

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Effect of Wheat (Triticum aestivum) Row Spacing, Seeding Rate, and Cultivar on Yield Loss from Cheat (Bromus secalinus)

Weed Technology ◽

10.1017/s0890037x00025823 ◽

1990 ◽

Vol 4 (3) ◽

pp. 487-492 ◽

Cited By ~ 30

Author(s):

Jeffrey A. Koscelny ◽

Thomas F. Peeper ◽

John B. Solie ◽

Stanley G. Solomon

Keyword(s):

Field Experiments ◽

Yield Loss ◽

Growth Habit ◽

Wheat Yield ◽

Row Spacing ◽

Juvenile Growth ◽

Seeding Rate ◽

Bromus Secalinus ◽

Hard Red Winter Wheat ◽

Red Winter Wheat

Field experiments were conducted in Oklahoma to determine the effects of row spacing, cultivar, seeding rate, and water or ammonium polyphosphate fertilizer injection in the row at seeding, on the competitiveness of hard red winter wheat with cheat. Decreasing row spacing from 23 to 8 cm increased yield of weed-free wheat at two of three locations and cheat-infested wheat in six of ten experiments. Increasing seeding rate from 265 to 530 seeds m-2increased wheat yield. Injecting water at 20 ml m-1of row at seeding did not increase wheat emergence or yield. Cheat seed production was not consistently suppressed by any one cultivar. Juvenile growth habit was unrelated to wheat competitiveness.

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Herbicide-Grazing Interactions in Cheat (Bromus secalinus)–Infested Winter Wheat (Triticum aestivum)1

Weed Science ◽

10.1017/s0043174500051432 ◽

1990 ◽

Vol 38 (6) ◽

pp. 532-535 ◽

Cited By ~ 2

Author(s):

Jeffrey A. Koscelny ◽

Thomas F. Peeper

Keyword(s):

Triticum Aestivum ◽

Winter Wheat ◽

Grain Yield ◽

Yield Components ◽

Harvest Index ◽

Field Experiments ◽

Wheat Yield ◽

Wheat Grain ◽

Bromus Secalinus ◽

Herbicide Treatments

Field experiments were conducted to determine the interaction of grazing and herbicide treatments on cheat control and biomass, wheat biomass, wheat grain yield, and wheat yield components. Ethyl-metribuzin at 1120 g ai ha−1and metribuzin at 420 g ai ha−1reduced cheat biomass 91 to 99 and 97 to 98%, respectively. Grazing had no effect on herbicide efficacy. Grazing increased cheat biomass in the check by 24% at only one location but did not affect total wheat plus cheat biomass. With one exception, controlled cheat was replaced by wheat on a 1:1 biomass basis when herbicides caused no crop injury. All herbicide treatments increased grain yield, but grazing did not alter yield. At two locations, increased heads m−2and spikelets/head accounted for most of the grain yield increases, but at one location seeds/spikelet and weight/seed were also increased. Harvest index was unaffected.

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Winter Wheat (Triticum aestivum) Response to Picloram and 2,4-D

Weed Technology ◽

10.1017/s0890037x00028165 ◽

1991 ◽

Vol 5 (2) ◽

pp. 317-320 ◽

Cited By ~ 9

Author(s):

David C. Heering ◽

Thomas F. Peeper

Keyword(s):

Triticum Aestivum ◽

Winter Wheat ◽

Growth Stage ◽

Field Experiments ◽

Wheat Cultivars ◽

Hard Red Winter Wheat ◽

Peduncle Length ◽

Red Winter Wheat

Postemergence spring applications of picloram and picloram plus 2,4-D frequently reduced mature height and peduncle length of hard red winter wheat in field experiments. Yield reductions were more severe from picloram applied alone to the first joint growth stage than late tillering stage wheat. In two of six experiments picloram plus 2,4-D reduced yield more than picloram alone. Yields of four wheat cultivars were reduced by picloram and picloram plus 2,4-D at one of two locations. At the second location only the yield of ‘Chisholm’ and ‘Rohm and Haas Seed 7837’ were reduced by those herbicides.

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Net Returns from Cheat (Bromus secalinus) Control in Winter Wheat (Triticum aestivum)

Weed Technology ◽

10.1017/s0890037x00027883 ◽

1993 ◽

Vol 7 (2) ◽

pp. 459-464 ◽

Cited By ~ 9

Author(s):

Greg G. Justice ◽

Thomas F. Peeper ◽

John B. Solie ◽

Francis M. Epplin

Keyword(s):

Triticum Aestivum ◽

Winter Wheat ◽

Field Experiments ◽

Wheat Yield ◽

Row Spacing ◽

Seeding Rate ◽

Net Returns ◽

Herbicide Treatment ◽

Seed Content ◽

Bromus Secalinus

In field experiments, wheat row spacing, seeding rate, and herbicide treatment affected cheat seed content of harvested wheat, wheat yield, and net returns. No individual practice or combination of practices consistently increased net returns from cheat-infested wheat. Net returns frequently were increased and never decreased by applying metribuzin at 420 g ha−1 or chlorsulfuron + metsulfuron at 21.9 + 4.4 g ha−1 or by increasing the seeding rate compared to baseline inputs. The data indicate that herbicide rates should not be reduced when row spacing is decreased and/or seeding rates increased.

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Sulfonylurea Herbicides Affect Hard Red Winter Wheat (Triticum aestivum) Forage and Grain Yield

Weed Technology ◽

10.1017/s0890037x00040392 ◽

1996 ◽

Vol 10 (3) ◽

pp. 531-534 ◽

Cited By ~ 1

Author(s):

Jeffrey A. Koscelny ◽

Thomas F. Peeper ◽

Eugene G. Krenzer

Keyword(s):

Triticum Aestivum ◽

Winter Wheat ◽

Grain Yield ◽

Field Experiments ◽

Sulfonylurea Herbicides ◽

Wheat Grain ◽

Forage Production ◽

Hard Red Winter Wheat ◽

Herbicide Treatments ◽

Red Winter Wheat

Field experiments were conducted to determine whether residual sulfonylurea herbicides applied at cheat suppression rates affect hard red winter wheat forage production and grain yield. Triasulfuron at 30 g/ha or chlorsulfuron plus metsulfuron at 26 g/ha applied PRE and metribuzin applied early POST alone at 280 g/ha or tank-mixed with triasulfuron at 158 + 30 g/ha or chlorsulfuron plus metsulfuron at 210 + 21 g/ha, all decreased total forage production of weed-free wheat. Conversely, all herbicide treatments except triasulfuron applied PRE increased wheat grain yield.

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