Management of pigweed (Amaranthus spp.) in grain sorghum with integrated strategies

2019 ◽  
Vol 33 (5) ◽  
pp. 701-709
Author(s):  
Marshall M. Hay ◽  
J. Anita Dille ◽  
Dallas E. Peterson
Keyword(s):  
Herbicide Resistance ◽  
Management Strategies ◽  
Field Trials ◽  
Grain Sorghum ◽  
Limited Information ◽  
Crop Cultivation ◽  
Row Crop ◽  
Amaranthus Spp ◽  
Narrow Row ◽  
Density And Biomass

AbstractPigweed is difficult to manage in grain sorghum because of widespread herbicide resistance, a limited number of registered effective herbicides, and the synchronous emergence of pigweed with grain sorghum in Kansas. The combination of cultural and mechanical control tactics with an herbicide program are commonly recognized as best management strategies; however, limited information is available to adapt these strategies to dryland systems. Our objective for this research was to assess the influence of four components, including a winter wheat cover crop (CC), row-crop cultivation, three row widths, with and without a herbicide program, on pigweed control in a dryland system. Field trials were implemented during 2017 and 2018 at three locations for a total of 6 site-years. The herbicide program component resulted in excellent control (>97%) in all treatments at 3 and 8 weeks after planting (WAP). CC provided approximately 50% reductions in pigweed density and biomass for both timings in half of the site-years; however, mixed results were observed in the remaining site-years, ranging from no attributable difference to a 170% increase in weed density at 8 WAP in 1 site-year. Treatments including row-crop cultivation reduced pigweed biomass and density in most site-years 3 and 8 WAP. An herbicide program is required to achieve pigweed control and should be integrated with row-crop cultivation or narrow row widths to reduce the risk of herbicide resistance. Additional research is required to optimize the use of CC as an integrated pigweed management strategy in dryland grain sorghum.

Integrated pigweed (Amaranthus spp.) management in glufosinate-resistant soybean with a cover crop, narrow row widths, row-crop cultivation, and herbicide program

2019 ◽  
Vol 33 (5) ◽  
pp. 710-719
Author(s):  
Marshall M. Hay ◽  
J. Anita Dille ◽  
Dallas E. Peterson
Keyword(s):  
Cover Crop ◽  
Field Trials ◽  
Palmer Amaranth ◽  
Crop Cultivation ◽  
Development Of Resistance ◽  
Row Crop ◽  
Row Width ◽  
Narrow Row ◽  
Density And Biomass ◽  
Management Recommendations

AbstractSuccessful pigweed management requires an integrated strategy to delay the development of resistance to any single control tactic. Field trials were implemented during 2017 and 2018 in three counties in Kansas on dryland (limited rainfall, nonirrigated), glufosinate-resistant soybean. The objective was to assess pigweed control with combinations of a winter wheat cover crop (CC), three soybean row widths (76, 38, and 19 cm), row-crop cultivation 2.5 weeks after planting (WAP), and an herbicide program to develop integrated pigweed management recommendations. All combinations of the four components were assessed by 16 treatments. All treatments with the herbicide program resulted in excellent (>97%) pigweed control and were analyzed separately from the other components. Treatments containing row-crop cultivation reduced pigweed density and biomass 3 and 8 WAP in all locations compared with the 76-cm row width plus no CC treatment. CC impacts were mixed. In Riley County, Palmer amaranth density and biomass were reduced; in Reno County, no additional Palmer amaranth control was observed; in Franklin County, the CC had greater waterhemp density and biomass compared with the treatments containing no CC. Narrow row widths achieved the most consistent results of all cultural components when data were pooled across locations: Decreasing row widths from 76 to 38 cm resulted in a 23% reduction in pigweed biomass 8 WAP and decreasing row width from 38 to 19 cm achieved a 15% reduction. Row-crop cultivation should be incorporated where possible as a mechanical option to manage pigweed, and narrow row widths should be used to suppress late-season pigweed growth when feasible. Inconsistent pigweed control from CC was achieved and should be given special consideration before implementation. The integral use of these components with an herbicide program as a system should be recommended to achieve the best pigweed control and reduce the risk of developing herbicide resistance.

scholarly journals Tracking Changes on Soil Structure and Organic Carbon Sequestration after 30 Years of Different Tillage and Management Practices

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 291
Author(s):  
Ramón Bienes ◽  
Maria Jose Marques ◽  
Blanca Sastre ◽  
Andrés García-Díaz ◽  
Iris Esparza ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Organic Carbon ◽  
Management Practices ◽  
Management Strategies ◽  
Triticum Aestivum L ◽  
Field Trials ◽  
Conventional Tillage ◽  
Soil Parameters ◽  
Wilting Point

Long-term field trials are essential for monitoring the effects of sustainable land management strategies for adaptation and mitigation to climate change. The influence of more than thirty years of different management is analyzed on extensive crops under three tillage systems, conventional tillage (CT), minimum tillage (MT), and no-tillage (NT), and with two crop rotations, monoculture winter-wheat (Triticum aestivum L.) and wheat-vetch (Triticum aestivum L.-Vicia sativa L.), widely present in the center of Spain. The soil under NT experienced the largest change in organic carbon (SOC) sequestration, macroaggregate stability, and bulk density. In the MT and NT treatments, SOC content was still increasing after 32 years, being 26.5 and 32.2 Mg ha−1, respectively, compared to 20.8 Mg ha−1 in CT. The SOC stratification (ratio of SOC at the topsoil/SOC at the layer underneath), an indicator of soil conservation, increased with decreasing tillage intensity (2.32, 1.36, and 1.01 for NT, MT, and CT respectively). Tillage intensity affected the majority of soil parameters, except the water stable aggregates, infiltration, and porosity. The NT treatment increased available water, but only in monocropping. More water was retained at the permanent wilting point in NT treatments, which can be a disadvantage in dry periods of these edaphoclimatic conditions.

Management strategies to reduce losses caused by fusarium seedling blight of field pea

2013 ◽  
Vol 93 (4) ◽  
pp. 619-625 ◽  
Author(s):  
K. F. Chang ◽  
S. F. Hwang ◽  
H. U. Ahmed ◽  
B. D. Gossen ◽  
G. D. Turnbull ◽  
...  
Keyword(s):  
Root Rot ◽  
Field Experiments ◽  
Management Strategies ◽  
Stand Density ◽  
Field Trials ◽  
Field Pea ◽  
Seedling Blight ◽  
Inoculum Level ◽  
Fusarium Seedling Blight ◽  
Disease Pressure

Chang, K. F., Hwang, S. F., Ahmed, H. U., Gossen, B. D., Turnbull, G. D. and Strelkov, S. E. 2013. Management strategies to reduce losses caused by fusarium seedling blight of field pea. Can. J. Plant Sci. 93: 619–625. Fusarium seedling blight can cause substantial reductions in the stand density of field pea in western Canada. In greenhouse experiments, emergence decreased and root rot severity rose with increasing inoculum density. In field trials in 2007 and 2008 near Edmonton, AB, seeding at different depths and seeding dates did not consistently affect emergence or yield in Fusarium-infested soils. In field experiments, emergence declined significantly with each increase in inoculum level. Also, seed yield were reduced at high levels of disease pressure. Treatment of seed with Apron Maxx improved emergence, nodulation and yield of treatments challenged with inoculum of F. avenaceum in both greenhouse and field experiments. This research demonstrates the need to prevent seedling blight and root rot through proper seed treatment.

scholarly journals Herbicide Resistance: Definition and Management Strategies

2000 ◽  
Author(s):  
Timothy S Prather ◽  
Joseph M Ditomaso ◽  
Jodie S Holt
Keyword(s):  
Herbicide Resistance ◽  
Management Strategies

scholarly journals Pengembangan Media Booklet Berbasis Potensi Lokal Kalimantan Barat Pada Materi Keanekaragaman Hayati Pada Siswa Kelas X di SMA Muhammadiyah 1 Pontianak

2019 ◽  
Vol 3 (1) ◽  
pp. 44-52
Author(s):  
Eti Setyaningsih ◽  
Ari Sunandar ◽  
Anandita Eka Setiadi
Keyword(s):  
Core Competencies ◽  
Phase 1 ◽  
Model Development ◽  
Field Trials ◽  
Local Potential ◽  
Limited Information ◽  
Initial Product ◽  
Initial Field ◽  
Student Responses ◽  
Basic Competencies

ABSTRACT. Based on the results of interviews with biology teachers of SMA Muhammadiyah 1 Pontianak, that not implemented yet local potential based learning is because of limited information. This research aims to develop local potential of West Kalimantan based booklet media on biodiversity material in Grade X of SMA Muhammadiyah 1 Pontianak.. Media development of this booklet used the Brog&Gall model development method, with stages:(1) Research and data collection,(2) planning,(3) Initial product development,(4) Initial field trials,(5) initial product repairs, and (6) field trials. The results research phase (1) that the book and worksheets teacher have not shown local potential, stage (2) the designed booklet contains core competencies, basic competencies, indicators, objectives, contents, evaluations, and bibliography, stage (3) shows the validity booklets on language aspects 85.3% (very valid), material aspects 95.3% (very valid) and media aspects 90.6% (very valid), stage (4) student responses was 85,7% (very positive) and the teacher's response was 88.7% (very positive). Then stage (5) and stage (6), student responses 90.0% (very positive) and teachers 90.4% (very positive), it concluded that developed booklet media valid and received very positive response from students and teachers.

scholarly journals Using satellite navigation for seeding of wide-row and narrow-row crops  

2011 ◽  
Vol 57 (Special Issue) ◽  
pp. S7-S13
Author(s):  
M. Macák ◽  
M. Žitňák ◽  
L. Nozdrovický
Keyword(s):  
Crop Production ◽  
Spring Barley ◽  
Satellite Navigation ◽  
Navigation Systems ◽  
Row Crops ◽  
Satellite Navigation System ◽  
Row Crop ◽  
Narrow Row ◽  
Correct Application ◽  
Satellite Navigation Systems

The present paper is aimed at the use of satellite navigation of field machinery during seeding, this operation belonging to the most important field practises. Our attention was focused on the determination of the accuracy of the satellite navigation system based on using the correction signal real-time kinematic and its correct application for planting a wide-row crop (sunflower) and seeding a narrow-row crop (spring barley). The aim of the field experiment was also to specify the level of the necessary accuracy of satellite navigation systems during planting and seeding. The length of seeding/planting equipment was confronted with the accuracy of navigation of individual passes, especially when turning on the headlands. In the conclusion, the importance is highlighted of the automated tractor headland control during satellite navigation of combined field machines in the crop production.

scholarly journals The Perceived Benefits, Challenges, and Environmental Effects of Cover Crop Implementation in South Carolina

Agriculture ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 372
Author(s):  
Lucas Clay ◽  
Katharine Perkins ◽  
Marzieh Motallebi ◽  
Alejandro Plastina ◽  
Bhupinder Singh Farmaha
Keyword(s):  
South Carolina ◽  
Cover Crops ◽  
Cover Crop ◽  
Management Practice ◽  
Soil Health ◽  
Education Level ◽  
Limited Information ◽  
Best Management ◽  
Row Crop ◽  
The Impact

Cover crops are becoming more accepted as a viable best management practice because of their ability to provide important environmental and soil health benefits. Because of these benefits, many land managers are strongly encouraging the use of cover crops. Additionally, there is limited information on farmers′ perceptions of the benefits and challenges of implementing cover crops. Many farmers state that they do not have enough money or time to implement cover crops. In an attempt to gather more data about the adoption rate and perceptions of cover crops in South Carolina, a survey was sent to 3000 row crop farmers across the state. Farmers were asked whether they implement cover crops and their perceptions of the benefits and challenges associated with implementation. Furthermore, questions were asked regarding the impact of row cropping on their environment to gauge farmer′s education level on environmental impacts. Responses showed many people are implementing cover crops; however, there are still differences in perceptions about benefits and challenges between those who are adopting cover crops and those who are not. This research assesses these differences and aims to provide a baseline for focusing cover crop programs to tackle these certain challenges and promote the benefits.

Influence of row spacing and cultivar selection on annual ryegrass (Lolium rigidum) control and grain yield in chickpea (Cicer arietinum)

2019 ◽  
Vol 70 (2) ◽  
pp. 140 ◽  
Author(s):  
Gulshan Mahajan ◽  
Kerry McKenzie ◽  
Bhagirath S. Chauhan
Keyword(s):  
Grain Yield ◽  
Cicer Arietinum ◽  
Weed Management ◽  
Integrated Management ◽  
Management Strategies ◽  
Integrated Weed Management ◽  
Row Spacing ◽  
Annual Ryegrass ◽  
Lolium Rigidum ◽  
Narrow Row

Annual ryegrass (ARG) (Lolium rigidum Gaudin) is a problematic weed for chickpea (Cicer arietinum L.) production in Australia. Understanding the critical period of control of ARG in chickpea is important for developing effective integrated management strategies to prevent unacceptable yield loss. Experiments were conducted over 2 years at the research farm of the University of Queensland, Gatton, to evaluate the effect of chickpea row spacing (25 and 75cm) and cultivar (PBA Seamer and PBA HatTrick) and ARG infestation period (from 0, 3 and 6 weeks after planting (WAP), and weed-free) on ARG suppression and grain yield of chickpea. Year×treatment interactions were not significant for any parameter, and none of the treatment combinations showed any interaction for grain yield. Average grain yield was greater (20%) with 25-cm than 75-cm rows. On average, PBA Seamer had 9% higher yield than PBA HatTrick. Average grain yield was lowest in season-long weedy plots (562kg ha–1) and highest in weed-free plots (1849kg ha–1). Grain yield losses were lower when ARG emerged at 3 WAP (1679kg ha–1). Late-emerged ARG (3 and 6 WAP) had lower biomass (4.7–22.2g m–2) and number of spikes (5–24m–2) than ARG that emerged early; at 0 WAP, weed biomass was 282–337g m–2 and number of spikes 89–120m–2. Compared with wide row spacing, narrow row spacing suppressed ARG biomass by 16% and 52% and reduced number of spikes of ARG by 26% and 48% at 0 WAP and 3 WAP, respectively. PBA Seamer suppressed ARG growth more effectively than PBA HatTrick, but only in the season-long weedy plots. Our results imply that in ARG-infested fields, grain yield of chickpea can be increased by exploring narrow row spacing and weed-competitive cultivars. These cultural tools could be useful for developing integrated weed management tactics in chickpea in combination with pre-emergent herbicides.

scholarly journals Performance of Two Bioherbicide Fungi for Waterhemp and Pigweed Control in Pumpkin and Soybean

Plant Disease ◽  
2011 ◽  
Vol 95 (4) ◽  
pp. 469-477 ◽  
Author(s):  
Loretta M. Ortiz-Ribbing ◽  
Kenny R. Glassman ◽  
Gordon K. Roskamp ◽  
Steven G. Hallett
Keyword(s):  
Cropping Systems ◽  
Disease Incidence ◽  
Field Trials ◽  
Weed Biomass ◽  
Common Waterhemp ◽  
Air Temperatures ◽  
Amaranthus Rudis ◽  
Fungal Organisms ◽  
Sequential Treatments ◽  
Amaranthus Spp

Common waterhemp (Amaranthus rudis) and pigweeds (Amaranthus spp.) are troublesome weeds in many cropping systems and have evolved resistance to several herbicides. Field trials to further develop Microsphaeropsis amaranthi and Phomopsis amaranthicola as bioherbicides for control of waterhemp and pigweeds were conducted to test the effectiveness of these organisms in irrigated and nonirrigated pumpkin and soybean plots over 2 years at three locations in western Illinois. The bioherbicide was applied with lecithin and vegetable oil at 187 liters ha–1 in 2008 and 374 liters ha–1 in 2009. Treatments included spore suspensions of M. amaranthi and P. amaranthicola alone, a mixture of both organisms, and sequential treatments of the organisms with halosulfuron-methyl (Sandea Herbicide) in pumpkin or glyphosate (Roundup Original Max Herbicide) in soybean. Bioherbicide effectiveness was estimated at approximately 7 and 14 days after treatment, as disease incidence, disease severity, percent weed control, and weed biomass reduction. Significant reductions in weed biomass occurred in treatments with one or both of the fungal organisms, and potential exists to tank mix M. amaranthi with halosulfuron-methyl. Leaf surface moisture and air temperatures following application may account for inconsistencies in field results between year and locations. These fungal organisms show potential as bioherbicides for weeds in the genus Amaranthus.

Simulation of efficient irrigation management strategies for grain sorghum production over different climate variability classes

2019 ◽  
Vol 170 ◽  
pp. 49-62 ◽  
Author(s):  
Kritika Kothari ◽  
Srinivasulu Ale ◽  
James P. Bordovsky ◽  
Kelly R. Thorp ◽  
Dana O. Porter ◽  
...  
Keyword(s):  
Climate Variability ◽  
Irrigation Management ◽  
Management Strategies ◽  
Grain Sorghum ◽  
Sorghum Production
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