Defining Optimum Herbicide Rates and Timing for Wild Oat (Avena fatua) Control in Spring Wheat (Triticum aestivum)1

2000 ◽  
Vol 14 (1) ◽  
pp. 167-175 ◽  
Author(s):  
F. A. HOLM ◽  
KEN J. KIRKLAND ◽  
F. CRAIG STEVENSON
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Avena Fatua ◽  
Wild Oat

Wild Oat (Avena fatua) Control in Spring Wheat (Triticum aestivum) and Barley (Hordeum vulgare) with Reduced Rates of Postemergence Herbicides

1997 ◽  
Vol 11 (3) ◽  
pp. 591-597 ◽  
Author(s):  
Eric Spandl ◽  
Beverly R. Durgan ◽  
Douglas W. Miller
Keyword(s):  
Triticum Aestivum ◽  
Hordeum Vulgare ◽  
Spring Wheat ◽  
Avena Fatua ◽  
Wild Oat ◽  
Economic Return ◽  
Grain Yields ◽  
Oat Biomass ◽  
Postemergence Herbicides

Rates and application timings of postemergence herbicides for wild oat control in spring wheat and barley were evaluated at Crookston, MN, from 1994 to 1996. Diclofop, imazamethabenz, and fenoxaprop plus MCPA plus thifensulfuron plus tribenuron were applied to one- to three-leaf wild oat; and difenzoquat, imazamethabenz, fenoxaprop plus MCPA plus thifensulfuron plus tribenuron, and fenoxaprop plus 2,4-D plus MCPA were applied to four- to five-leaf wild oat at 1/2 ×, 3/4 ×, and 1 × rates. Wild oat response to herbicide rate and timing was similar in wheat and barley. Wild oat control with 1/2 × rates generally was less than that with 3/4 × rates, which was lower than or similar to that with 1 × rates. Wild oat biomass was often reduced less with 1/2 × rates than 1 × rates. However, reducing herbicide rates generally did not influence grain yields or net economic return. Grain yields and net economic return were generally greater in herbicide-treated plots than in the nontreated control.

Efficacy of Fall Incorporated and Non-incorporated Granular Triallate on Wild Oat (Avena fatua) and Wheat (Triticum aestivum)

1994 ◽  
Vol 8 (3) ◽  
pp. 607-611 ◽  
Author(s):  
Kenneth J. Kirkland
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Wheat Yield ◽  
Subsequent Development ◽  
Avena Fatua ◽  
Wild Oat ◽  
Fresh Weight ◽  
West Central ◽  
Wheat Stubble ◽  
Incorporation Method

The influence of incorporation vs no incorporation on the efficacy of granular triallate applied in mid-October at 1400 and 1700 g ai/ha to control wild oat was evaluated in spring wheat in west central Saskatchewan over a 7-yr period. All fall-applied triallate reduced wild oat panicles and fresh weight, and increased yield compared to untreated checks. With applications in standing wheat stubble there was no difference in wild oat control from incorporation versus no incorporation. All triallate treatments reduced wild oat panicles and fresh weight by over 95%, and resulted in wheat yield increases ranging from 29 to 67%. In tilled fallow, incorporated granules provided better wild oat control than when there was no incorporation. Wheat yield increases ranged from 50 to 85% for triallate treatments with yield for incorporated triallate approximately 15% greater than non-incorporated. The rate of triallate did not affect the level of wild oat control achieved with either incorporation method. In separate tolerance studies triallate incorporation method did not affect spring wheat emergence or subsequent development.

Spring Wheat (Triticum aestivum) Growth and Yield as Influenced by Duration of Wild Oat (Avena fatua) Competition

1993 ◽  
Vol 7 (4) ◽  
pp. 890-893 ◽  
Author(s):  
Kenneth J. Kirkland
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Wheat Yield ◽  
Avena Fatua ◽  
Growth And Yield ◽  
Wild Oat ◽  
Fresh Weight ◽  
Leaf Stage ◽  
Removal Experiments

The effect of duration of wild oat competition on spring wheat yield and growth was determined in time-of-removal experiments conducted over a three year study period in Saskatchewan, Canada. Failure to remove wild oat reduced wheat yield 28 and 39% at wild oat populations of 64 and 188 plants per m2, respectively. Wheat yield was not reduced by wild oat densities of 64 or 118 plants per m2until the six- and seven-leaf stage of wild oat, respectively. Removing wild oat at 64 plants per m2before the seven-leaf stage and 118 plants per m2before the five-leaf stage did not increase wheat culm or fresh weight production.

CONTROL OF WILD OAT WITH TRIALLATE IN A SPRING WHEAT CONSERVATION TILLAGE SYSTEM

1986 ◽  
Vol 66 (1) ◽  
pp. 181-184 ◽  
Author(s):  
S. J. CARLSON ◽  
L. A. MORROW
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Conservation Tillage ◽  
Wheat Yield ◽  
Triticum Aestivum L ◽  
Avena Fatua ◽  
Wild Oat ◽  
Minimum Tillage ◽  
Tillage System

Triallate granules were applied at 2.8 kg/ha without incorporation either immediately before or after planting into standing spring wheat (Triticum aestivum L. ’Fielder’ and ’Dirkwin’) stubble. The triallate granules controlled wild oat (Avena fatua L.), and resulted in increased spring wheat yield. Difenzoquat or diclofop-methyl application also increased wheat yields.Key words: Triallate, oat (wild), conservation tillage, minimum tillage, wheat (spring)

Postemergence Application of Triallate for Wild Oat Control

Weed Science ◽  
1975 ◽  
Vol 23 (2) ◽  
pp. 137-141 ◽  
Author(s):  
Stephen D. Miller ◽  
John D. Nalewaja
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Avena Fatua ◽  
Wild Oat ◽  
Emulsifiable Concentrate

The effectiveness of postemergence applications of triallate [S-(2,3,3-trichloroallyl)diisopropylthiocarbamate] for wild oat (Avena fatua L.) control in spring wheat (Triticum aestivum L. ‘Waldron’) was evaluated in the field and greenhouse. The stage of the wild oat plants at the time of treatment did not appear to influence wild oat control with postemergence applications of triallate in the field; however, in the greenhouse, wild oat plants became more resistant with increased maturation. Granular triallate was more effective than the emulsifiable concentrate for postemergence wild oat control. Fair season-long postemergence wild oat control was obtained with the granular formulation of triallate at rates of 2.24 kg/ha or greater. However, some wheat injury was observed in the field with the 2.80 and 3.36 kg/ha rates of granular triallate. Moisture and temperature influenced postemergence wild oat control with triallate.

Selecting for triallate resistance in wild oat

2000 ◽  
Vol 80 (3) ◽  
pp. 665-667 ◽  
Author(s):  
Hugh J. Beckie ◽  
Sakti Jana
Keyword(s):  
Triticum Aestivum ◽  
Key Words ◽  
Herbicide Resistance ◽  
Spring Wheat ◽  
Triticum Aestivum L ◽  
Avena Fatua ◽  
Wild Oat

Resistance in wild oat (Avena fatua L.) to triallate was monitored from 1996 to 1998 in plots of continuous spring wheat (Triticum aestivum L.) and wheat-fallow, with or without triallate applied from 1979 to 1997. Resistance in wild oat occurred after 18 yr where triallate was applied annually in continuous wheat, but not where triallate was applied 10 times in a wheat-fallow rotation over the same period. No resistance was detected in the continuous wheat or wheat-fallow plots where no herbicide was applied. Key words: Herbicide resistance, wild oat, triallate

Difenzoquat for Wild Oat(Avena fatua)Control

Weed Science ◽  
1978 ◽  
Vol 26 (6) ◽  
pp. 571-576 ◽  
Author(s):  
S. D. Miller ◽  
J. D. Nalewaja ◽  
J. Pudelko ◽  
K. A. Adamczewski
Keyword(s):  
Triticum Aestivum ◽  
Soil Moisture ◽  
Durum Wheat ◽  
Spring Wheat ◽  
Triticum Durum ◽  
Avena Fatua ◽  
Wild Oat ◽  
Simulated Rainfall ◽  
Stages Of Growth ◽  
Air Temperatures

Postemergence difenzoquat (1,2-dimethyl-3,5-diphenyl-1H-pyrazolium) for wild oat(Avena fatuaL.) control in spring wheat(Triticum aestivumL.), durum wheat(Triticum durumDesf.), and barley(Hordeum vulgareL.) was evaluated in the field, greenhouse, and controlled environmental chamber. Wild oat control with difenzoquat was greater at the five- that at the three and one-half or two-leaf stages of growth. Barley tolerance to difenzoquat was excellent; however, spring wheat tolerance was influenced by cultivar. Durum wheat generally was more tolerant of difenzoquat than spring wheat. Tank mix combinations of broadleaf herbicides with difenzoquat had no effect on crop injury or wild oat control. Wild oat control with difenzoquat was greatest with adequate soil moisture, adequate fertility, warm air temperatures and high relative humidity. A simulated rainfall of 0.25 mm within ½ h or 1 mm within 4 h of application reduced wild oat control with difenzoquat.

Temperature Effect on Difenzoquat Phytotoxicity

Weed Science ◽  
1984 ◽  
Vol 32 (2) ◽  
pp. 150-153 ◽  
Author(s):  
Stephen D. Miller ◽  
John D. Nalewaja ◽  
Adam Dobranski
Keyword(s):  
Triticum Aestivum ◽  
Hordeum Vulgare ◽  
Temperature Effect ◽  
Spring Wheat ◽  
Avena Fatua ◽  
Controlled Environment ◽  
Wild Oat ◽  
Night Temperature ◽  
Hard Red Spring Wheat ◽  
Temperature Environment

The phytotoxicity of difenzoquat (1,2-dimethyl-3,5-diphenyl-1H-pyrazolium) applied to the three-leaf stages of hard red spring wheat (Triticum aestivumL. ‘Waldron’ and ‘Era’), barley (Hordeum vulgareL. ‘Beacon’) and wild oat (Avena fatuaL. ♯ AVEFA) grown under constant, fluctuating, or alternating day-night temperatures was determined in controlled environment chambers. Difenzoquat injury to wild oat and Era wheat was greater at a constant 20 or 30 than at 10 C; however, injury to Waldron wheat was similar at 10, 20, and 30 C. Difenzoquat caused only slight injury to barley, and injury was similar at all temperatures. In Era wheat, selectivity of difenzoquat for wild oat was maximum with a 10-C night temperature in an otherwise 30-C-temperature environment; in Beacon barley selectivity was maximum with 3 or more days of 20- or 30-C posttreatment temperature; and in Waldron wheat selectivity was not adequate at any of the temperatures studied.

Wild Oat (Avena fatua) Control with Fall- and Spring-Applied Triallate

Weed Science ◽  
1980 ◽  
Vol 28 (4) ◽  
pp. 416-418 ◽  
Author(s):  
S. D. Miller ◽  
J. D. Nalewaja
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Field Experiments ◽  
Avena Fatua ◽  
Wild Oat ◽  
Liquid Formulation ◽  
Time Of Application ◽  
Wheat Stubble

Two formulations of triallate [S-(2, 3, 3-trichloroallyl)diisopropylthiocarbamate] were evaluated for their effectiveness in controlling wild oat (Avena fatuaL.) in spring wheat (Triticum aestivumL.) in 12 field experiments conducted between 1967 and 1978. Control of wild oat was greater with fall applications of triallate granules than liquid or with spring applications of either liquid or granules. Further-more, 1.1 kg/ha of triallate granules applied in the fall controlled wild oat as well as did 1.7 kg/ha of liquid triallate applied in the fall. Wild oat control with triallate was usually better when soil incorporated than when surface applied regardless of formulation or time of application. Triallate granules controlled wild oat similarly on either plowed ground or wheat stubble; whereas, liquid triallate controlled wild oat better on plowed ground than wheat stubble. A delay of 8 h in triallate incorporation did not reduce wild oat control with either formulation; however, a delay of 24 h reduced wild oat control with the liquid formulation.

Allelopathic potential of wild oat (Avena fatua) on spring wheat (Triticum aestivum) growth

1983 ◽  
Vol 9 (8) ◽  
pp. 1235-1245 ◽  
Author(s):  
Wayne J. Schumacher ◽  
Donald C. Thill ◽  
Gary A. Lee
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Avena Fatua ◽  
Wild Oat ◽  
Allelopathic Potential
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