scholarly journals Weed Management in Strip-tilled Irish Potato and Sweetpotato Systems

1996 ◽  
Vol 6 (3) ◽  
pp. 238-240 ◽  
Author(s):  
Greg D. Hoyt ◽  
David W. Monks
Keyword(s):  
Weed Management ◽  
Ipomoea Batatas ◽  
Conventional Tillage ◽  
Amaranthus Retroflexus ◽  
Irish Potato ◽  
Ambrosia Artemisiifolia ◽  
Weed Suppression ◽  
Tillage Systems ◽  
Herbicide Treatments ◽  
Brachiaria Platyphylla

Experiments were conducted to evaluate the effect of tillage systems and weed management on weed suppression and potato yield. Strip-tillage (ST) and conventional-tillage (CT) systems produced equal yields of Irish potato (Solanum tuberosum L.) or sweetpotato [Ipomoea batatas (L.) Lam.] when herbicide treatments were applied. Weeds in the nontreated control reduced yield of Irish potato and prevented storage root growth in sweetpotato. Excellent control of broadleaf signalgrass [Brachiaria platyphylla (Griseb.) Nash], henbit (Lamium amplexicaule L.), prickly sida (Sida spinosa L.), and common ragweed (Ambrosia artemisiifolia L.) was obtained with metribuzin + metolachlor applied preemergence at Irish potato planting, followed by sethoxydim + crop oil applied postemergence in ST and CT systems. Redroot pigweed (Amaranthus retroflexus L.) control was >98% at 4 weeks after treatment but was 73% to 84% at harvest across all herbicide treatments in both tillage systems. In sweetpotato, control of black mustard [Brassica nigra (L.) W.J.D. Koch], goosegrass [Eleusine indica (L.) Gaertn.], and fall panicum [Panicum dichotomiflorum Michx.] was >95% throughout the growing season for all herbicide treatments in both ST and CT.

scholarly journals Influence of soil tillage and weed suppression on winter wheat yield

2011 ◽  
Vol 56 (2) ◽  
pp. 111-119
Author(s):  
Branimir Mikic ◽  
Bojan Stipesevic ◽  
Emilija Raspudic ◽  
Georg Drezner ◽  
Bojana Brozovic
Keyword(s):  
Winter Wheat ◽  
Wheat Yield ◽  
Conventional Tillage ◽  
Weed Suppression ◽  
Recommended Dose ◽  
Soil Tillage ◽  
Tillage Systems ◽  
Half Dose ◽  
Winter Wheat Yield ◽  
High Yields

Modern soil tillage systems based on different tools than mouldboard plough have very often stronger weed occurrence, which can be a serious problem for achieving high yields. An obvious solution for weed suppression is a herbicide, whose improper use can deteriorate environment and lead toward serious ecological problems. In order to investigate the interaction between soil tillage and herbicide, trial was set up in Valpovo in seasons 2008/09 - 2010/11. Two soil tillage systems (CT-conventional tillage, based on mouldboard ploughing, and CH-chiselling and disk harrowing, without ploughing) and five herbicide treatments (NH-control, no herbicides; H10- recommended dose of Herbaflex (2 l ha-1); H05-half dose of Herbaflex; F10- recommended dose of Fox (1.5 l ha-1); and F05-half dose of Fox) were applied to winter wheat crops. Results showed similar effects of soil tillage on the winter wheat yield, whereas different herbicide dosages showed similar weed suppression and influence on winter wheat yield.

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

Weed Science ◽  
1988 ◽  
Vol 36 (5) ◽  
pp. 642-647 ◽  
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.

scholarly journals How Do Intensification Practices Affect Weed Management and Yield in Quinoa (Chenopodium quinoa Willd) Crop?

2020 ◽  
Vol 12 (15) ◽  
pp. 6103
Author(s):  
Ali reza Safahani Langeroodi ◽  
Roberto Mancinelli ◽  
Emanuele Radicetti
Keyword(s):  
Seed Yield ◽  
Cover Crops ◽  
Weed Management ◽  
Cropping Systems ◽  
Soil Layer ◽  
Chenopodium Quinoa ◽  
Conventional Tillage ◽  
Amaranthus Retroflexus ◽  
No Tillage ◽  
Weed Seeds

Quinoa cultivation is well-adapted to sustainable cropping systems, even if seed yield could be severely limited due to several constraints, such as weeds. Field trials were performed in Gorgan (Iran) to quantify the effects of agro-ecological service crops (rye, CCr; winter vetch, CCw; and no cover, CC0), tillage regimes (conventional tillage, CT; and no-tillage, ZT), and herbicide rates (100% rate, H100; 75% rate, H75; and without herbicide, H0). Weed characteristics and quinoa yield were measured. Quinoa seed yield was the highest in CCw-ZT-H100. Seed yield in H100 and H75 were higher compared with H0 (2.30 vs. 1.58 t ha−1, respectively). Under conventional tillage, 46% of weed seeds were observed in the 0–10 cm soil layer and 54% in 10–20 cm soil layers, respectively, while, under no-tillage, about 63% of weed seeds were located up to 10 cm of soil. Amaranthus retroflexus L. was the most abundant species. The total weed density was the lowest in CCr-ZT-H100 and tended to be higher in CC0 (30.9 plant m−2) and under CT (29.0 plant m−2). These findings indicate that cover crops have potential for managing weeds in quinoa; however, their inclusion should be supported by chemical means to maintain high seed.

scholarly journals Weed Management in Transplanted Bell Pepper (Capsicum annuum) with Pretransplant Tank Mixes of Sulfentrazone, S-metolachlor, and Dimethenamid-p

HortScience ◽  
2008 ◽  
Vol 43 (5) ◽  
pp. 1492-1494 ◽  
Author(s):  
Darren E. Robinson ◽  
Kristen McNaughton ◽  
Nader Soltani
Keyword(s):  
Weed Management ◽  
Chenopodium Album ◽  
Fruit Size ◽  
Field Trials ◽  
Amaranthus Retroflexus ◽  
Ambrosia Artemisiifolia ◽  
Bell Pepper ◽  
Weed Species ◽  
Marketable Yield ◽  
Excellent Control

Pepper growers currently have limited access to many effective broadleaf herbicides. Field trials were conducted over a 3-year period in Ontario to study the effect of tank mixtures of sulfentrazone (100 or 200 g·ha−1 a.i.) with either s-metolachlor (1200 or 2400 g·ha−1 a.i.) or dimethenamid-p (750 or 1500 g·ha−1 a.i.) on transplanted bell pepper. Under weed-free conditions, there was no visual injury or reduction in plant height, fruit number, fruit size, or marketable yield of transplanted pepper with pretransplant applications of sulfentrazone applied in tank mixtures with s-metolachlor or dimethenamid-p. The tank mixture of sulfentrazone + s-metolachlor gave greater than 85% control of redroot pigweed (Amaranthus retroflexus) and eastern black nightshade (Solanum ptycanthum), but only 70% to 76% control of velvetleaf (Abutilon theophrasti), common ragweed (Ambrosia artemisiifolia), and common lambsquarters (Chenopodium album). The combination of sulfentrazone + dimethenamid-p provided good to excellent control of all weed species except velvetleaf. Based on this study, sulfentrazone and dimethenamid-p have potential for minor use registration in pepper.

Influence of Tillage Systems on Annual Weed Densities and Control in Solid-seeded Soybean (Glycine max)

Weed Science ◽  
1990 ◽  
Vol 38 (2) ◽  
pp. 158-165 ◽  
Author(s):  
Douglas D. Buhler ◽  
Edward S. Oplinger
Keyword(s):  
Weed Control ◽  
Conventional Tillage ◽  
Tillage Systems ◽  
Soybean Yield ◽  
Redroot Pigweed ◽  
No Till ◽  
Giant Foxtail ◽  
Herbicide Treatments ◽  
Chisel Plow ◽  
And Control

Field research was conducted at Arlington, WI, and Janesville, WI, in 1986 and 1987 to evaluate the effect of conventional-tillage, chisel plow, and no-till systems on the density and control of annual weed species in solid-seeded soybean. Common lambsquarters densities were not greatly influenced by tillage systems, but redroot pigweed densities were generally highest in the chisel plow system. Conventional tillage always had greater velvetleaf densities than no-till and no-till always had greater giant foxtail densities than conventional tillage. Giant foxtail and redroot pigweed became more difficult to control when tillage was reduced, while velvetleaf became less of a problem. This response was not observed with all herbicide treatments evaluated and several herbicide treatments provided excellent weed control. Soybean yield was not affected by tillage systems under weed-free conditions and differences in soybean yield appeared to be due to differences in weed control.

Effect of tillage system and crop sequence on irrigated sugarbeet production

2004 ◽  
Vol 84 (3) ◽  
pp. 739-747 ◽  
Author(s):  
J. R. Moyer ◽  
J. Nitschelm ◽  
P. Regitnig ◽  
R. E. Blackshaw ◽  
H. C. Huang ◽  
...  
Keyword(s):  
Wind Erosion ◽  
Soil Surface ◽  
Conventional Tillage ◽  
Amaranthus Retroflexus ◽  
Plant Residue ◽  
No Tillage ◽  
Dry Beans ◽  
Tillage Systems ◽  
Minimum Tillage ◽  
Tillage System

Sugarbeets (Beta vulgaris L.) are grown on intensively tilled-irrigated land in southern Alberta, which is subject to soil erosion by wind. Experiments were conducted on commercial fields near Burdett, AB, to determine the effect of the tillage system and previous crops on sugarbeet production. The previous crops were dry bean (Phaseolus vulgaris L.) or wheat (Triticum aestivium L.) and the tillage systems were conventional (moldboard plow, vibrashank cultivator, harrow, packer), minimum (double disc, self-cleaning harrow, glyphosate) or no tillage (glyphosate). After dry beans, sugarbeet fresh weight and extractable sugar yields were similar with all tillage systems. All of the tillage systems left less than 100 g m-2 of plant residue on the soil surface in the spring following dry beans, which is insufficient to protect the soil from wind erosion. After wheat, sugarbeet yields were similar with minimum and conventional tillage but lower with no tillage. Both minimum and no-tillage systems left sufficient plant residue on the soil surface to protect the soil from erosion (> 200 g m-2). Sugarbeet stand density following wheat was lower with no tillage than conventional or minimum tillage, reflecting poor seed placement and daily maximum soil temperature (5 cm depth) of up to 10°C lower under no tillage than conventional tillage. After wheat, there was a trend toward lower densities of hard-seeded annuals, such as redroot pigweed (Amaranthus retroflexus L.), after no tillage than conventional tillage. Of the cropping systems tested in this study, only the minimum tillage system after wheat provided optimum sugarbeet yield and left enough plant residue to protect the soil from wind erosion. Key words: Crop rotation, bean, wheat, sugarbeet, no-tillage

Weed Seed Decline in Irrigated Soil after Rotation of Crops and Herbicides

Weed Science ◽  
1984 ◽  
Vol 32 (1) ◽  
pp. 84-89 ◽  
Author(s):  
Edward E. Schweizer ◽  
Robert L. Zimdahl
Keyword(s):  
Weed Management ◽  
Conventional Tillage ◽  
Barley Grain ◽  
Amaranthus Retroflexus ◽  
Management Systems ◽  
Weed Seed ◽  
Weed Seeds ◽  
Seed Reserves ◽  
The Impact ◽  
Intensive System

The impact of two weed management systems on the weed seed reserves of the soil, on the yearly weed problem, and on barley (Hordeum vulgareL. ‘Steptoe’), corn (Zea maysL. ‘Pioneer 3709′), and sugarbeet (Beta vulgarisL. ‘Mono Hy D2′) production was assessed where these crops were grown in rotation for 6 consecutive years. Weeds were controlled in each crop with a moderate (system I) or intensive (system II) level of herbicides, plus conventional tillage. Weed seeds from seven annual genera were identified, with redroot pigweed(Amaranthus retroflexusL. ♯3AMARE) andChenopodiumcomprising 56 and 30%, respectively, of the initial 1377 million weed seeds/ha that were present in the upper 25 cm of the soil profile. After the sixth cropping year, the overall decline in the total number of weed seeds in soil was 96% in system I and 97% in system II. Over the 6-yr period, about 1.3 times more weeds escaped control in system I than in system II; and within a crop, the fewest number of weeds escaped annually in sugarbeets, and the most in barley. Yields of barley grain, corn silage, and recoverable sucrose were similar each year in the two weed management systems.

Efficacy and Economy of Weed Management Systems for Sicklepod (Senna obtusifolia) and Morningglory (Ipomoeaspp.) Control in Soybean (Glycine max)

1995 ◽  
Vol 9 (3) ◽  
pp. 456-461 ◽  
Author(s):  
William K. Vencill ◽  
John W. Wilcut ◽  
C. Dale Monks
Keyword(s):  
Glycine Max ◽  
Weed Management ◽  
Field Experiments ◽  
Conventional Tillage ◽  
Management Systems ◽  
Broadcast Application ◽  
Senna Obtusifolia ◽  
Net Returns ◽  
Herbicide Treatments

Field experiments were conducted in Tifton, Midville, and Athens, GA to determine economic net returns from PRE-broadcast, PRE-banded, POST, and POST-directed herbicide treatments and inter-row cultivation in conventional-tillage soybean. Metribuzin applied PRE-broadcast was more effective for sicklepod and morningglory control than PRE-banded. Soybean net returns were not significantly reduced in two of three years in plots treated with metribuzin applied PRE-banded compared with broadcast application. The addition of POST or POST-directed herbicides increased treatment net returns over PRE-broadcast and PRE-banded metribuzin two of the three years of the study. No significant soybean injury was observed.

Effects of Tillage Systems and Weed Management on Weed Populations in Grain Sorghum (Sorghum bicolor)

Weed Science ◽  
1994 ◽  
Vol 42 (4) ◽  
pp. 541-547 ◽  
Author(s):  
William K. Vencill ◽  
Philip A. Banks
Keyword(s):  
Weed Management ◽  
Field Research ◽  
Conventional Tillage ◽  
Grain Sorghum ◽  
Management Systems ◽  
No Tillage ◽  
High Input ◽  
Tillage Systems ◽  
Sorghum Production ◽  
Smooth Pigweed

Field research was conducted from 1987 to 1991 to evaluate the influence of four weed management systems on weed population and species dynamics in conventional-tillage and no-tillage grain sorghum production. These weed management systems included zero, low, medium, and high input systems. The weed seedbank increased faster in zero and low input weed management systems than in the high input weed management systems because of differences in weed control. Tillage influenced weed seed densities as well. Common ragweed, common lambsquarters, horseweed, and sicklepod seed densities often were greater in no-tillage than conventional-tillage plots. Common cocklebur and large crabgrass seed densities were usually greater in conventional-tillage than no-tillage plots. Smooth pigweed seed densities were not affected by tillage. Increasing weed management inputs diminished differences between tillage systems. Smooth pigweed dominated the weed populations after 4 yr in both tillage systems even in high input systems.

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