Weed management options for conventional soybean

2016 ◽  
Vol 96 (5) ◽  
pp. 743-747 ◽  
Author(s):  
Kimberly D. Belfry ◽  
Michael J. Cowbrough ◽  
François J. Tardif ◽  
Peter H. Sikkema
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Weed Species ◽  
Management Options ◽  
Soybean Yield ◽  
Weed Interference ◽  
Control Options

Various preemergence (PRE), PRE followed by postemergence (POST), and POST weed control options for conventional soybean were evaluated. More than 90% control of selected weed species were observed for most treatments. However, weed interference in plots treated with S-metolachlor + metribuzin or S-metolachlor + metribuzin + cloransulam-methyl resulted in reduced soybean yield.

scholarly journals A Multy-Year Study Reveals the Importance of Residual Herbicides on Weed Control in Glyphosate-Resistant Soybean

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
A.L. NUNES ◽  
J. LORENSET ◽  
J.E. GUBIANI ◽  
F.M. SANTOS
Keyword(s):  
Field Study ◽  
Weed Control ◽  
Weed Management ◽  
Crop Residues ◽  
Residual Effect ◽  
Soybean Cultivar ◽  
Weed Species ◽  
Soybean Yield ◽  
Herbicide Treatments

ABSTRACT: A 3-year field study was conducted to assess the potential for using pre-emergent (PRE) herbicides tank mixed with glyphosate as a means of controlling weed species in soybean. In 2011/12, 2012/13 and 2013/14 growing sessions soybean cultivar Brasmax Apollo RR was planted under residues of rye. The herbicide treatments glyphosate (gly) (1,296 g a.i. ha-1), gly + S-metolachlor (1,296 + 1,920), gly + imazaquin (1,296 +161), gly + pendimethalin (1,296 + 1,000), gly + metribuzin (1,296 + 480), gly + 2.4-D amine (1,296 + 1,209) was applied in pre-emergence (PRE) over rye crop residues two days before soybean sowing. In addition, full season weed-free and weedy control plots were included. Gly + S-metolachlor and gly + pendimethalin reduced the horseweed density from 48 to 3 and 6 plants m-2, respectively. The mix containing gly + metribuzin and gly + 2.4-D amine and gly applied alone had no effect in the horseweed control. The mix containing gly + metribuzin, gly + 2.4-D amine, gly + imazaquin and gly applied alone had no effect in the crabgrass control. In contrast gly + S-metolachlor and gly + pendimethalin reduced the crabgrass density from 70 to 0 and 1 plant m-2, respectively. The soybean yield was higher with weed-free, S-metolachlor and metribuzin treatments. The use of an herbicide with residual effect had impact on weed management and soybean yield. In conclusion, a greater control of horseweed and crabgrass occurred when S-metolachlor or pendimethalin was applied PRE.

Selecting Cost-Minimizing Herbicide Programs for Corn (Zea mays)

1996 ◽  
Vol 10 (2) ◽  
pp. 327-336 ◽  
Author(s):  
J. Rolf Olsen ◽  
Jayson K. Harper ◽  
William S. Curran
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Conventional Tillage ◽  
Programming Approach ◽  
Weed Species ◽  
Management Options ◽  
Corn Production ◽  
No Till ◽  
The Cost ◽  
Herbicide Programs

A computer model which selects least cost herbicide programs given a minimum desired level of weed control could provide growers with economical weed management options. Using an integer programming approach, a herbicide selection model was developed for corn production under Pennsylvania conditions. Models for three rotations (corn-soybean, corn-corn, and corn-alfalfa) under three tillage systems (conventional tillage, reduced tillage, and no-till) that evaluated 21 soil-applied and 13 postemergence herbicide options for 24 weeds were developed. Each model minimizes the cost of a herbicide program subject to a desired level of weed control. By selecting the weed species to be controlled and the level of control desired, customized herbicide programs can be generated. The models can also be used to evaluate the cost of changing the level of control desired for an individual weed species or set of weeds.

The Effects of Single- and Multiple-Weed Interference on Soybean Yield in the Far-Eastern Region of Russia

Weed Science ◽  
2017 ◽  
Vol 65 (3) ◽  
pp. 371-380 ◽  
Author(s):  
Jong-Seok Song ◽  
Jin-Won Kim ◽  
Ji-Hoon Im ◽  
Kyu-Jong Lee ◽  
Byun-Woo Lee ◽  
...  
Keyword(s):  
Weed Management ◽  
Hyperbolic Model ◽  
Parameter Estimates ◽  
Eastern Region ◽  
Weed Species ◽  
Primorsky Krai ◽  
Soybean Yield ◽  
Common Ragweed ◽  
Common Lambsquarters ◽  
Weed Interference

Lack of understanding the effects of single- and multiple-weed interference on soybean yield has led to inadequate weed management in Primorsky Krai, resulting in much lower average yield than neighboring regions. A 2 yr field experiment was conducted in a soybean field located in Bogatyrka (43.82°N, 131.6°E), Primorsky Krai, Russia, in 2013 and 2014 to investigate the effects of single and multiple interference caused by naturally established weeds on soybean yield and to model these effects. Aboveground dry weight was negatively affected the most by weed interference, followed by number of pods and seeds. Soybean yield under single-weed interference was best demonstrated by a rectangular hyperbolic model, showing that common ragweed and barnyardgrass were the most competitive weed species, followed by annual sowthistle, American sloughgrass, and common lambsquarters. In the case of multiple-weed interference, soybean yield loss was accurately described by a multivariate rectangular hyperbolic model, with total density equivalent as the independent variable. Parameter estimates indicated that weed-free soybean yields were similar in 2013 and 2014, i.e., estimated as 1.72 t and 1.75 t ha−1, respectively, and competitiveness of each weed species was not significantly different between the two years. Economic thresholds for single-weed interference were 0.74, 0.66, 1.15, 1.23, and 1.45 plants m−2for common ragweed, barnyardgrass, annual sowthistle, American sloughgrass, and common lambsquarters, respectively. The economic threshold for multiple-weed interference was 0.70 density equivalent m−2. These results, including the model, thus can be applied to a decision support system for weed management in soybean cultivation under single and multiple-weed interference in Primorsky Krai and its neighboring regions of Russia.

A Screening of Weed Control Options During Juneberry (Amelanchier alnifolia) Establishment

2005 ◽  
Vol 19 (3) ◽  
pp. 623-628 ◽  
Author(s):  
Harlene M. Hatterman-Valenti
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Field Trials ◽  
Weed Species ◽  
Management Options ◽  
Common Lambsquarters ◽  
Common Purslane ◽  
Physical Weed Control ◽  
Plant Injury ◽  
Physical Treatments

Few weed management options are available for juneberry, which has limited the potential for this new crop. Field trials were initiated at three locations in North Dakota to evaluate efficacy and crop safety associated with chemical and physical weed control treatments applied just before or immediately after transplanting. All treatments except norflurazon and trifluralin provided at least 85% control of redroot pigweed, common lambsquarters, common purslane, and yellow foxtail for the duration of the trial at Absaraka, ND, during 2001. Stinkgrass weed control 8 wk after treatment (WAT) dropped to unacceptable levels (<85%) with all treatments except azafenidin at 0.5 kg ai/ ha, norflurazon, and oxyfluorfen at 1.1 kg ai/ha at Dawson, ND, during 2001. However, juneberry injury 4 WAT by azafenidin at 0.5 kg/ha, flumioxazin at both locations, or azafenidin at 0.34 kg/ha and oxyfluorfen at 1.1 kg ai/ha at Absaraka, ND, was greater than observed for plants within the physical treatments. Juneberry injury generally decreased with time, yet remained >20% at 8 WAT for azafenidin and flumioxazin at Absaraka, ND, and for all treatments except the mulches at Dawson, ND. Plant injury 8 WAT at Absaraka in 2002 was 10% or less for all treatments and was lower compared with 2001. All physical treatments—azafenidin at 0.34 and 0.5 kg/ha, flumioxazin at 0.29 kg/ha, and oryzalin at 4.5 kg/ha—provided at least 85% control of all weed species at Carrington and Absaraka, ND, during 2002.

Field evaluation of a bioeconomic model for weed management in soybean (Glycine max)

Weed Science ◽  
1997 ◽  
Vol 45 (1) ◽  
pp. 158-165 ◽  
Author(s):  
Douglas D. Buhler ◽  
Robert P. King ◽  
Scott M. Swinton ◽  
Jeffery L. Gunsolus ◽  
Frank Forcella
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Field Evaluation ◽  
Corn Yield ◽  
Bioeconomic Model ◽  
Economic Returns ◽  
Weed Species ◽  
Economic Return ◽  
Soybean Yield ◽  
Herbicide Treatment

A bioeconomic model was tested as a decision aid for weed control in soybean at Rosemount, MN, from 1991 to 1994. The model makes recommendations for preplant incorporated and preemergence control tactics based on the weed seed content of the soil and postemergence decisions based on weed seedling densities. Weed control, soybean yield, herbicide use, and economic return with model-generated treatments were compared to standard herbicide and mechanical control systems. Effects of these treatments on weed populations and corn yield the following year were also determined. In most cases, the model-generated treatments controlled weeds as well as a standard herbicide treatment. Averaged over the 3 yr, the quantity of herbicide active ingredient applied was decreased by 47% with the seedbank model and 93% with the seedling model compared with a standard soil-applied herbicide treatment. However, the frequency of herbicide application was not reduced. Soybean yields reflected differences in weed control and crop injury. Net economic return to weed control was increased 50% of the time using model-recommended treatments compared with a standard herbicide treatment. Weed control treatments the previous year affected weed density in the following corn crop but had little effect on weed control or corn yield. The bioeconomic model was responsive to differing weed populations, maintained weed control and soybean yield and often increased economic returns under the weed species and densities in this research.

Influence of Weed Height and Glufosinate plus 2,4-D Combinations on Weed Control in Soybean with Resistance to 2,4-D

2013 ◽  
Vol 27 (2) ◽  
pp. 271-280 ◽  
Author(s):  
Brett D. Craigmyle ◽  
Jeffrey M. Ellis ◽  
Kevin W. Bradley
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Transgenic Crops ◽  
Management Options ◽  
Soybean Field ◽  
Common Waterhemp ◽  
Weed Interference ◽  
Greenhouse Experiments ◽  
Herbicide Programs ◽  
Large Crabgrass

The introduction of transgenic crops with resistance to 2,4-D will provide growers with new weed management options in soybean. Field and greenhouse experiments were conducted in 2010 and 2011 to determine the influence of weed height on compatibility of glufosinate and 2,4-D in resistant soybean. Results from these experiments indicate a significant increase in the rate of glufosinate or 2,4-D is needed when applied alone in order to achieve similar levels of weed control as lower rates of glufosinate and 2,4-D combinations. Mixtures of glufosinate and 2,4-D were more effective in controlling common waterhemp, Asiatic dayflower, and barnyardgrass than either herbicide alone, and with the magnitude of difference greater as the height of common waterhemp increased. Large crabgrass control decreased when glufosinate was applied with 2,4-D compared with glufosinate alone, with the magnitude of the reduction greater as weed height increased. Sequential application of glufosinate and 2,4-D eliminated the antagonism noted with tank mixtures. Soybean yields were also reduced by approximately 3% in response to 30 to 35–cm compared to 10 to 15–cm herbicide applications because of the combination of weed interference and reduced control. Overall, results from these experiments indicate that glufosinate plus 2,4-D combinations are likely to provide increased control of problematic weeds like Asiatic dayflower and common waterhemp while providing similar grass control as herbicide programs that contain glufosinate alone.

Phosphorus Application Influences the Critical Period of Weed Control in Lettuce

Weed Science ◽  
2013 ◽  
Vol 61 (3) ◽  
pp. 410-414 ◽  
Author(s):  
Dennis C. Odero ◽  
Alan L. Wright
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Critical Period ◽  
Management Practices ◽  
Natural Populations ◽  
P Fertilization ◽  
Weed Species ◽  
Weed Interference ◽  
Fertilization Level ◽  
Phosphorus Application

Field studies were conducted in 2010 and 2011 at Belle Glade, FL, to evaluate the influence of phosphorus (P) applications (98, 196, and 293 kg P ha−1) on the critical period of weed control (CPWC) in lettuce. Natural populations of mixed weed species were allowed to interfere with lettuce in a series of treatments of both increasing duration of weed interference and the duration of weed-free period imposed within 98, 196, and 293 kg P ha−1levels added to the soil. The beginning and end of the CPWC for each P fertilization level based on a 5% acceptable marketable fresh lettuce yield loss level was determined by fitting log-logistic and Gompertz models to represent the increasing duration of weed interference and the duration of weed-free period, respectively. The CPWC in lettuce was estimated to be 4.6, 3.4, and 2.3 wk at 98, 196, and 293 kg P ha−1, respectively. The beginning of the CPWC was delayed at the highest P fertilization level (293 kg P ha−1), whereas the end of the CPWC was hastened at the same P fertilization level. Our study shows that inadequate levels of P fertilization in lettuce result in the need for more-intensive weed management practices to attain acceptable yields.

scholarly journals Use of Sulfentrazone (F6285) for Weed Management in Field-grown Ornamentals

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 661e-661
Author(s):  
Kimberly B. Collins ◽  
Leslie A. Weston ◽  
Robert E. McNiel
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Block Design ◽  
Woody Species ◽  
Field Trials ◽  
Weed Species ◽  
Ongoing Research ◽  
Weed Interference ◽  
Soil Activity ◽  
Postemergence Herbicides

The nursery industry currently has few options for effective season-long weed control, because few soil persistent herbicides are registered for use in ornamentals. An herbicide that provides season-long weed control with minimal injury to ornamentals would be extremely beneficial because it would enable the nurseryman to produce high-quality ornamentals with minimal weed interference Sulfentrazone (F6285), a newly developed herbicide from the FMC Corp., has shown promising results for weed control in field trials with ornamentals. Additional, trials are needed to further evaluate sulfentrazone in hopes that it may be registered for use in ornamentals in the future. Our objectives are 1) to increase long-term weed management in ornamentals, including woody species and groundcover; 2) to evaluate rate structures of sulfentrazone and combinations, including preemergence and postemergence herbicides; 3) to evaluate sulfentrazone selectivity in weed species and in ornamentals; 4) to evaluate sulfentrazone mode of action in weed species; and 5) to measure the soil activity of sulfentrazone. To achieve the first three objectives, a randomized complete block design will be used to evaluate 10 woody species and 17 herbicide combinations. The response variables will be weed control and phytotoxicity ratings taken at 0, 4, 8, and 12 weeks after treatment. The results of this study will be used in ongoing research trials in an attempt to register sulfentrazone (F6285) for use in ornamentals.

Field Evaluation of a Bioeconomic Model for Weed Management in Corn (Zea mays)

Weed Science ◽  
1996 ◽  
Vol 44 (4) ◽  
pp. 915-923 ◽  
Author(s):  
Douglas D. Buhler ◽  
Robert P. King ◽  
Scott M. Swinton ◽  
Jeffery L. Gunsolus ◽  
Frank Forcella
Keyword(s):  
Weed Control ◽  
Seed Bank ◽  
Active Ingredient ◽  
Weed Management ◽  
Corn Yield ◽  
Bioeconomic Model ◽  
Weed Species ◽  
Economic Return ◽  
Soybean Yield ◽  
Herbicide Treatment

A bioeconomic weed management model was tested as a decision aid for weed control in corn at Rosemount, MN, from 1991 to 1994. The model makes recommendations for preemergence control tactics based on the weed seed content of the soil and postemergence decisions based on weed seedling densities. Weed control, corn yield, herbicide active ingredient applied, and economic return with model-generated treatments were compared to standard herbicide and mechanical control treatments. Effects of these treatments on weed populations and soybean yield the following year were also determined. In most cases, the model-generated treatments controlled weeds as well as the standard herbicide treatment. The quantity of herbicide active ingredient applied decreased 27% with the seed bank model and 68% with the seedling model relative to the standard herbicide treatment. However, the frequency of herbicide application was not reduced. In 1 yr, seed bank model treatments did not control weeds as well as the standard herbicide or seedling model treatments. Corn yields reflected differences in weed control. Net economic return to weed control was not increased by using model-generated control recommendations. Weed control treatments the previous year affected weed density in the following soybean crop. In 2 of 3 yr, these differences did not after weed control or soybean yield. Although tactics differed, the bioeconomic model generally resulted in weed control and corn yield similar to the standard herbicide. The model was responsive to differing weed populations, but did not greatly after economic returns under the weed species and densities in this research.

Bio-efficacy of post emergence herbicides in boro rice nursery as well as main field and their residual effects on non-target microorganisms

2020 ◽  
Vol 57 (3) ◽  
pp. 199-210
Author(s):  
Rajib Kundu ◽  
Mousumi Mondal ◽  
Sourav Garai ◽  
Ramyajit Mondal ◽  
Ratneswar Poddar
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Field Experiments ◽  
Block Design ◽  
Resistance Index ◽  
Residual Effects ◽  
Cost Ratio ◽  
Main Field ◽  
Weed Species ◽  
Similar Treatment

Field experiments were conducted at research farm of Bidhan Chandra Krishi Viswavidyalaya, Kalyani, West Bengal, India (22°97' N latitude and 88°44' E longitude, 9.75 m above mean sea level) under natural weed infestations in boro season rice (nursery bed as well as main field) during 2017-18 and 2018-19 to evaluate the herbicidal effects on weed floras, yield, non-target soil organisms to optimize the herbicide use for sustainable rice-production. Seven weed control treatments including three doses of bispyribac-sodium 10% SC (150,200, and 250 ml ha-1), two doses of fenoxaprop-p-ethyl 9.3% EC (500 and 625 ml ha-1), one weed free and weedy check were laid out in a randomized complete block design, replicated thrice. Among the tested herbicides, bispyribac-sodium with its highest dose (250 ml ha-1) resulted in maximum weed control efficiency, treatment efficiency index and crop resistance index irrespective of weed species and dates of observation in both nursery as well as main field. Similar treatment also revealed maximum grain yield (5.20 t ha-1), which was 38.38% higher than control, closely followed by Fenoxaprop-p-ethyl (625 ml ha-1) had high efficacy against grasses, sedge and broadleaf weed flora. Maximum net return (Rs. 48765 ha-1) and benefit cost ratio (1.72) were obtained from the treatment which received bispyribac-sodium @ 250 ml ha-1. Based on overall performance, the bispyribac-sodium (250 ml ha-1) may be considered as the best herbicide treatment for weed management in transplanted rice as well as nursery bed.

Sign in / Sign up

Export Citation Format

Share Document