Effectiveness of Herbicides and Tillage on Quackgrass (Elytrigia repens) Control in Corn (Zea mays)

Postemergence applications of nicosulfuron and primisulfuron were compared to preplant glyphosate and atrazine plus simazine for quackgrass control in reduced tillage and no-till corn. The level of quackgrass control was reduced by no-till practices. At 6 wk after planting, glyphosate and atrazine plus simazine were most effective in controlling quackgrass. Quackgrass biomass 12 wk after planting indicated that the performance of the herbicides were generally similar, although primisulfuron was less effective in no-till. One year after corn planting, levels of quackgrass control in the tilled plots were the same as or better than in the no-till treatments. Atrazine plus simazine was the most effective herbicide treatment over tillage systems, while primisulfuron was the least effective.

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Weed Control and Crop Injury in Ecofallow Corn (Zea mays) Using Imazethapyr

Weed Technology ◽

10.1017/s0890037x00043384 ◽

1997 ◽

Vol 11 (4) ◽

pp. 748-754

Author(s):

Gail A. Wicks ◽

Garold W. Mahnken ◽

Gordon E. Hanson

Keyword(s):

Zea Mays ◽

Winter Wheat ◽

Weed Control ◽

Field Experiments ◽

Corn Hybrids ◽

Control Option ◽

No Till ◽

Herbicide Treatment ◽

Wheat Stubble ◽

Better Than

Imidazolinone-resistant and -tolerant corn hybrids give growers a new weed control option. Field experiments were conducted in 1993 and 1994 to evaluate imazethapyr for controlling weeds in no-till corn planted into winter wheat stubble in a winter wheat–ecofallow corn rotation. Imidazolinone-tolerant (IT) and imidazolinone-resistant (IR) corn were protected genetically from injury by imazethapyr that was applied preplant, preemergence, or postemergence to ‘Pioneer Brand 3417,’ ‘Pioneer Brand 3417 IR,’ ‘ICI Seeds 8532,’ and ‘ICI Seeds 8532 IT’ hybrids. No difference in corn injury occurred between IR and IT corn. Imazethapyr applied to resistant or tolerant corn hybrids could be used to control weeds in ecofallow corn. Imazethapyr at 35 or 70 g ai/ha controlled triazine-resistant kochia better than the standard herbicide treatment of metolachlor plus cyanazine.

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HERBICIDES FOR FORAGE CORN NO-TILL SEEDED INTO CEREAL STUBBLE

Canadian Journal of Plant Science ◽

10.4141/cjps83-023 ◽

1983 ◽

Vol 63 (1) ◽

pp. 235-241 ◽

Cited By ~ 1

Author(s):

J. A. IVANY ◽

J. R. ENMAN

Keyword(s):

Zea Mays ◽

Weed Control ◽

Prince Edward Island ◽

Zea Mays L ◽

Crop Yields ◽

Taraxacum Officinale ◽

Plant Population ◽

No Till ◽

Herbicide Treatment ◽

Forage Yields

Forage corn (Zea mays L.) was grown successfully in Prince Edward Island by no-till planting the corn into standing cereal stubble 15–20 cm tall using a Buffalo no-till seeder. Planting with the slot-type shoe in a preliminary experiment in 1978 gave better forage yields than planting with a slice-type shoe mainly because of better plant population achieved. Subsequent experiments in 1979–1981 using the slot-type shoe to no-till plant corn in cereal stubble gave good forage yields when adequate weed control was provided with herbicide treatment. Best control of quackgrass (Agropyron repens L. Beauv.) and dandelion (Taraxacum officinale Weber) and crop yields was achieved with glyphosate + atrazine (1.5 + 2.5 kg a.i./ha) or amitrole + atrazine (3.4 + 2.5 kg a.i./ha) applied preemergence after seeding corn and before corn emergence. Control of quack grass and dandelion with glyphosate or amitrole used alone ranged from 71–80%, but paraquat alone did not provide any weed control. Addition of atrazine to paraquat, glyphosate, or amitrole gave improved control of quackgrass and dandelion and higher forage corn yields. Addition of 2.5 kg a.i./ha atrazine gave better results than use of 1.0 kg a.i./ha of atrazine.Key words: Forage corn, no-till seeding, glyphosate, atrazine, aminotriazole, paraquat

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Effect of Tillage Systems on the Efficacy and Phytotoxicity of Imazaquin and Imazethapyr in Soybean (Glycine max)

Weed Science ◽

10.1017/s0043174500071848 ◽

1989 ◽

Vol 37 (2) ◽

pp. 233-238 ◽

Cited By ~ 21

Author(s):

J. Anthony Mills ◽

William W. Witt

Keyword(s):

Glycine Max ◽

Weed Control ◽

Field Experiments ◽

Conventional Tillage ◽

No Tillage ◽

Tillage Systems ◽

Adequate Control ◽

No Till ◽

Herbicide Treatment ◽

Giant Foxtail

Field experiments were conducted to evaluate the interactions of tillage systems with imazaquin and imazethapyr on weed control and soybean injury and yield. Control of jimsonweed, common cocklebur, ivyleaf morningglory, velvetleaf, and giant foxtail from imazaquin and imazethapyr in conventional tillage was generally equal to or greater than control in no-tillage. However, under limited rainfall, weed control in no-tillage was generally equal to or greater than control in conventional tillage. Reductions in soybean heights due to herbicide treatment were evident in both tillage systems in 1985 and 1986 but not in. Soybean yields were reduced in 1985 from imazaquin at 140, 210, and 250 g/ha and imazethapyr at 105 and 140 g/ha. Yields were not reduced in 1986 and. Imazaquin and imazethapyr appear to provide adequate control of jimsonweed, common cocklebur, ivyleaf morningglory, velvetleaf, and giant foxtail in conventional and no-till systems.

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Reduced Rates of Herbicides Following Hilling Controlled Weeds in Conventional and Reduced Tillage Potato (Solanum tuberosum) Production

Weed Technology ◽

10.1017/s0890037x0004001x ◽

1996 ◽

Vol 10 (2) ◽

pp. 311-316 ◽

Cited By ~ 5

Author(s):

Robin R. Bellinder ◽

Russell W. Wallace ◽

Erik D. Wilkins

Keyword(s):

Solanum Tuberosum ◽

Weed Control ◽

Conventional Tillage ◽

Reduced Tillage ◽

Split Application ◽

Tillage Systems ◽

Herbicide Treatment

Time of hilling (4, 5, or 6 weeks after planting; WAP) and 0.5x, 1x, and split (0.5x + 0.5x) rates of metolachlor + metribuzin were evaluated in conventional tillage (CT) and rye-stubble, reduced tillage (RT) potato plots. Weed populations 4 to 10 WAP were generally higher in CT than in RT. Weed control was excellent in both tillage systems when 1x rates of metolachlor + metribuzin were applied delayed preemergence, or in a split application where 0.5x was applied delayed PRE and hilled 6 WAP, and followed with a second application of 0.5x metolachlor + metribuzin 7 days after hilling (DAH). Weed control with 0.5x rates of metolachlor + metribuzin applied 7 DAH, when hilled 4 and 5 WAP, was equivalent to the lx and split-rate treatments. Weed control was reduced only when hilling was delayed to 6 WAP and 0.5x of metolachlor + metribuzin applied 7 DAH. Total yields were not influenced by tillage, hilling, or herbicide treatment, however, larger numbers of green and small-sized tubers reduced marketable yields in RT.

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Influence of Tillage Systems on Giant Foxtail,Setaria faberi, and Velvetleaf,Abutilon theophrasti, Density and Control in Corn,Zea mays

Weed Science ◽

10.1017/s004317450007555x ◽

1988 ◽

Vol 36 (5) ◽

pp. 642-647 ◽

Cited By ~ 52

Author(s):

Douglas D. Buhler ◽

Tommy C. Daniel

Keyword(s):

Conventional Tillage ◽

Corn Yield ◽

Tillage Systems ◽

Setaria Faberi ◽

No Till ◽

Herbicide Treatment ◽

Giant Foxtail ◽

Herbicide Treatments ◽

Chisel Plow ◽

And Control

Giant foxtail density in corn was greater under no-till and chisel plow tillage systems than conventional or till plant. Giant foxtail density in no-till was 1400 shoots/m256 days after corn planting compared to 170 under conventional tillage. Velvedeaf density was greater under conventional tillage than all other tillage systems. Velvetleaf density was 120 plants/m256 days after corn planting under conventional tillage compared to 20 in no-till. Control of giant foxtail was often less under no-till or chisel plow conditions than conventional or till plant with the same herbicide treatment. Giant foxtail control with metolachlor treatments was affected less by tillage than similar treatments containing alachlor. Velvedeaf control was less with conventional tillage than other tillage systems when less than 1.7 kg/ha of atrazine was applied. Corn injury was not influenced by tillage systems. Corn yield was not affected by tillage systems under weed-free conditions. Several herbicide treatments resulted in corn yield similar to the weed-free under conventional tillage, but no herbicide treatment produced corn yield similar to the weed-free control under no-till conditions.

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Reduced Tillage Practices for the Southwestern US Peanut Production Region

Peanut Science ◽

10.3146/ps10-8.1 ◽

2011 ◽

Vol 38 (1) ◽

pp. 41-47 ◽

Cited By ~ 2

Author(s):

Chad B. Godsey ◽

Jeffrey Vitale ◽

Phil G. Mulder ◽

Jon-Joseph Q. Armstrong ◽

John P. Damicone ◽

...

Keyword(s):

Disease Incidence ◽

Production Costs ◽

Reduced Tillage ◽

Tillage Systems ◽

Production Region ◽

Tillage Practices ◽

No Till ◽

Peanut Production ◽

Ct System ◽

Strip Tillage

Abstract Oklahoma growers have increased their adoption of strip tillage (strip-till) and no tillage (no-till) systems as a means of reducing production costs and conserving soil resources. An experiment was conducted over three years to study the effects of three tillage systems [(conventional till (CT), no-till (NT), and strip-till (ST)] on pod yield, peanut grade, pest pressure, and economic profitability. Insect, disease, and weed incidence were determined in each year of the study. Peanut yield and grade were determined by mechanically harvesting the plot. No consistent differences were detected between NT and CT in peanut grade or yield when tillage systems were combined across years. In addition, no consistent differences were observed in disease incidence and insect populations. Economic analysis indicated that the NT system saved $93 ha−1 and generated $179 ha−1 more revenue compared to the CT system. Reduced tillage practices, especially NT, seem to be a good fit for SW peanut production areas.

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GROWTH AND NPK UPTAKE BY SOYBEAN CULTIVARS IN NORTHERN U.S.A. UNDER REDUCED TILLAGE SYSTEMS

Canadian Journal of Plant Science ◽

10.4141/cjps89-133 ◽

1989 ◽

Vol 69 (4) ◽

pp. 1101-1111 ◽

Cited By ~ 10

Author(s):

E. J. DEIBERT ◽

R. A. UTTER

Keyword(s):

Weed Control ◽

Dry Matter ◽

Dry Matter Production ◽

Soil Conditions ◽

Reduced Tillage ◽

Tillage Systems ◽

No Till ◽

Matter Production ◽

Tillage System ◽

Late Maturity

A field study was conducted during 1985–1987 on a Fargo clay soil to evaluate growth, and NPK content at beginning flowering, pod fill, and mature seed at harvest of an early- (McCall) and a late-maturity (Dawson) soybean (Glycine max (L.) Merr.) cultivar as influenced by conventional (plow) or reduced (sweep, intertill, no-till) tillage systems and weed control methods. Excellent seed emergence was obtained on all tillage systems. Fall application of granular herbicide provided excellent weed control but herbicide plus cultivation caused reduced plant growth. Tillage system did not significantly affect plant and seed dry matter production. Yearly differences in dry matter production between early- and late-maturity cultivars depended on precipitation distribution. N and P uptake at pod fill was equal to seed uptake while K in the seed was one-half that measured at pod fill. Stratification of P and K in the surface soil profile of the reduced tillage systems was not detrimental and possibly enhanced early growth when root development was not extensive. Plants exhibited chlorosis on only the plow system under wet soil conditions indicating improved internal drainage under the reduced tillage systems. Interactions of climate with tillage system and cultivar maturity were more pronounced in this soybean study than previously reported which may be related to the cool, dry northern area.Key words: Soybean, no-till, zero-till, weed control, plant nutrients, cultivars, soil nutrient stratification

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SEQUENTIAL CROPPING IN VEGETABLE AND TOBACCO PRODUCTION SYSTEMS UNDER VARIOUS TILLAGES

HortScience ◽

10.21273/hortsci.27.11.1172b ◽

1992 ◽

Vol 27 (11) ◽

pp. 1172b-1172

Author(s):

William Terry Kelley ◽

David L. Coffey

Keyword(s):

Production Systems ◽

Production Yield ◽

Reduced Tillage ◽

Tillage Systems ◽

Tomato Yield ◽

No Till ◽

Tobacco Production ◽

Winter Cover ◽

Sequential Cropping ◽

Plot Design

Three cropping sequences and three tillage systems were evaluated under reduced tillage. Sequences were spring `Packman' broccoli followed by `Sunny' tomatoes or 'm.s. Ky 14 × L8 tobacco, spring broccoli/tomatoes or tobacco/fall broccoli, and tomatoes or tobacco/fall broccoli. Each sequence was grown conventionally tilled/no winter cover, conventionally tilled/wheat winter cover and no-till transplanted directly into killed wheat. The study was conducted at Knoxville, (elev. 251m), Greeneville, (elev. 400m) and Crossville, (elev. 549m) during 1989 and 1990. Experiments were arranged in a strip-plot design with sequences stripped across tillages. No. 1 tomato yield was reduced in no-till at Greeneville (1989). Percentage of No. 1 tomatoes was not affected by tillage but the tomato-broccoli system produced a greater percentage at Greeneville (1990). Broccoli head size and subsequent yield was generally greater in conventionally tilled plots. Sequence generally had little affect on broccoli production. Yield and revenue of tobacco were generally lower in no-till treatments. Broccoli/tobacco sequences generally had the highest yield but varied by location. No-till produced lower quality tobacco both years at Knoxville but not at Greeneville.

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Emergence dynamics of barnyardgrass and jimsonweed from two depths when switching from conventional to reduced and no-till conditions

Spanish Journal of Agricultural Research ◽

10.5424/sjar/2016141-8752 ◽

2016 ◽

Vol 14 (1) ◽

pp. e1002

Author(s):

Vasileios Vasileiadis ◽

Robert J. Froud-Williams ◽

Donato Loddo ◽

Ilias G. Eleftherohorinos

Keyword(s):

Conservation Tillage ◽

Datura Stramonium ◽

Soil Disturbance ◽

Reduced Tillage ◽

Burial Depth ◽

Northern Greece ◽

Tillage Systems ◽

No Till ◽

Different Depths ◽

Disturbance Interaction

A cylinder experiment was conducted in northern Greece during 2005 and 2006 to assess emergence dynamics of barnyardgrass (Echinochloa crus-galli (L.) Beauv.) and jimsonweed (Datura stramonium L.) in the case of a switch from conventional to conservation tillage systems (CT). Emergence was surveyed from two burial depths (5 and 10 cm) and with simulation of reduced tillage (i.e. by soil disturbance) and no-till conditions. Barnyardgrass emergence was significantly affected by burial depth, having greater emergence from 5 cm depth (96%) although even 78% of seedlings emerged from 10 cm depth after the two years of study. Emergence of barnyardgrass was stable across years from the different depths and tillage regimes. Jimsonweed seeds showed lower germination than barnyardgrass during the study period, whereas its emergence was significantly affected by soil disturbance having 41% compared to 28% without disturbance. A burial depth x soil disturbance interaction was also determined, which showed higher emergence from 10 cm depth with soil disturbance. Jimsonweed was found to have significantly higher emergence from 10 cm depth with soil disturbance in Year 2. Seasonal emergence timing of barnyardgrass did not vary between the different burial depth and soil disturbance regimes, as it started in April and lasted until end of May in both years. Jimsonweed showed a bimodal pattern, with first emergence starting end of April until mid-May and the second ranging from mid-June to mid-August from 10 cm burial depth and from mid-July to mid-August from 5 cm depth, irrespective of soil disturbance in both cases.

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