Glyphosate-Resistant Giant Ragweed (Ambrosia trifida) Control in Glufosinate-Resistant Soybean

2014 ◽  
Vol 28 (4) ◽  
pp. 569-577 ◽  
Author(s):  
Simranpreet Kaur ◽  
Lowell D. Sandell ◽  
John L. Lindquist ◽  
Amit J. Jhala
Keyword(s):  
Field Experiments ◽  
Crop Yields ◽  
The United States ◽  
Early Spring ◽  
Ambrosia Trifida ◽  
Soybean Field ◽  
Agronomic Crops ◽  
Giant Ragweed ◽  
Rapid Growth Rate

Glyphosate-resistant giant ragweed is one of the most competitive weeds of agronomic crops in the United States. Early emergence and rapid growth rate makes giant ragweed a competitive weed early in the season and reduces crop yields. Therefore, early spring control of giant ragweed using a preplant herbicide is critical. Glufosinate is an alternative POST herbicide for weed control in glufosinate-resistant soybean. Field experiments were conducted at David City, NE, in 2012 and 2013 to evaluate the efficacy of preplant herbicides followed by glufosinate applied alone or in tank mixes for control of glyphosate-resistant giant ragweed in glufosinate-resistant soybean. Preplant treatments containing 2,4-D, flumioxazin, glufosinate, paraquat, saflufenacil, and sulfentrazone provided 79 to 99% control of giant ragweed 21 d after treatment (DAT), and subsequent application of glufosinate alone or in tank mixes resulted in 90 to 99% control at 21 DAT. Preplant application ofS-metolachlor plus metribuzin or chlorimuron, flumioxazin plus thifensulfuron followed by glufosinate resulted in < 40% control of giant ragweed, and soybean yields were < 870 kg ha−1. Although statistically comparable to several other treatments, preplant application of 2,4-D or saflufenacil tank mixes followed by glufosinate resulted in the highest level of control (> 97%) and soybean yield (2,624 to 3,378 kg ha−1). This study confirms that preplant herbicide options are available for control of glyphosate-resistant giant ragweed, and a follow-up application of glufosinate will provide season-long control in glufosinate-resistant soybean.

scholarly journals Control of glyphosate-resistant giant ragweed (Ambrosia trifida L.) with premix of iodosulfuron/thiencarbazone applied alone or in tank mixtures in no-till corn (Zea mays L.)

2018 ◽  
Vol 98 (4) ◽  
pp. 908-917 ◽  
Author(s):  
Simranpreet Kaur ◽  
Amit J. Jhala
Keyword(s):  
Field Experiments ◽  
Zea Mays L ◽  
Residual Activity ◽  
Early Spring ◽  
Effective Control ◽  
Corn Yield ◽  
Ambrosia Trifida ◽  
No Till ◽  
Giant Ragweed

The objectives of this study were to evaluate the efficacy of a new premix of iodosulfuron (6%)/thiencarbazone (45%) applied alone or tank-mixed with 2,4-D, dicamba, glyphosate, or metribuzin in the fall and (or) early spring followed by preemergence (PRE) and postemergence (POST) herbicide applications for control of glyphosate-resistant giant ragweed and their effect on corn yield. Field experiments were conducted in no-till corn fields infested with glyphosate-resistant giant ragweed (20–30 plants m−2) near Clay Center and McCool Junction, NE, in 2013 and 2014, respectively. A premix of iodosulfuron/thiencarbazone applied alone or in split applications in the fall and early spring controlled glyphosate-resistant giant ragweed <60% and resulted in a density of 14 giant ragweed plants m−2, which was comparable to the untreated control at 28 d after early spring treatment (DAEST). Metribuzin or 2,4-D applied alone resulted in <75% giant ragweed control at 28 DAEST; however, 2,4-D or dicamba tank-mixed with iodosulfuron/thiencarbazone provided ≥92% control. Treatments including 2,4-D or dicamba led to 85%–98% reduction in giant ragweed biomass at 28 DAEST. A follow-up application of a premix of isoxaflutole/thiencarbazone tank-mixed with atrazine applied PRE was not effective, although a POST application of tembotrione + atrazine resulted in >91% control at 28 d after postemergence treatment. The premix applied alone did not provide effective control of giant ragweed in corn primarily because lack of residual activity.

Halauxifen-methyl controls glyphosate-resistant horseweed (Conyza canadensis) but not giant ragweed (Ambrosia trifida) in winter wheat

2020 ◽  
Vol 34 (4) ◽  
pp. 607-612 ◽  
Author(s):  
Jessica Quinn ◽  
Nader Soltani ◽  
Jamshid Ashigh ◽  
David C. Hooker ◽  
Darren E. Robinson ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Weed Management ◽  
Field Experiments ◽  
The United States ◽  
Integrated Weed Management ◽  
Conyza Canadensis ◽  
Limited Information ◽  
Weed Species ◽  
Ambrosia Trifida ◽  
Giant Ragweed

AbstractHorseweed is a competitive summer or winter annual weed that produces up to 230,000 small seeds per plant that are capable of traveling more than 500 km via wind. Giant ragweed is a tall, highly competitive summer annual weed. Glyphosate-resistant (GR) horseweed and GR giant ragweed pose significant challenges for producers in the United States and Ontario, Canada. It is thought that an integrated weed management (IWM) system involving herbicide rotation is required to control GR biotypes. Halauxifen-methyl is a new selective broadleaf POST herbicide registered for use in cereal crops; there is limited information on its efficacy on horseweed and giant ragweed. The purpose of this research was to determine the efficacy of halauxifen-methyl applied POST, alone and in a tank mix, for the control of GR horseweed and GR giant ragweed in wheat across southwestern Ontario. For each weed species, an efficacy study consisting of six field experiments was conducted over a 2-yr period (2018, 2019). At 8 wk after application (WAA), halauxifen-methyl, fluroxypyr/halauxifen-methyl, fluroxypyr/halauxifen-methyl + MCPA EHE, fluroxypyr + MCPA ester, 2,4-D ester, clopyralid, and pyrasulfotole/bromoxynil + ammonium sulfate controlled GR horseweed >95%. Fluroxypyr and MCPA provided only 86% and 37% control of GR horseweed, respectively. At 8 WAA, fluroxypyr, fluroxypyr/halauxifen-methyl, fluroxypyr/halauxifen-methyl + MCPA EHE, fluroxypyr + MCPA ester, fluroxypyr/halauxifen-methyl + MCPA EHE + pyroxsulam, 2,4-D ester, clopyralid, and thifensulfuron/tribenuron + fluroxypyr + MCPA ester controlled GR giant ragweed 87%, 88%, 90%, 94%, 96%, 96%, 98%, and 93%, respectively. Halauxifen-methyl and pyroxsulam provided only 45% and 28% control of GR giant ragweed, respectively. Halauxifen-methyl applied alone POST in the spring controlled GR horseweed but not GR giant ragweed in winter wheat.

scholarly journals Interaction of dicamba, fluthiacet-methyl, and glyphosate for control of velvetleaf (Abutilon theopharsti) in dicamba/glyphosate-resistant soybean

2021 ◽  
pp. 1-21
Author(s):  
Jose H. S. de Sanctis ◽  
Amit J. Jhala
Keyword(s):  
United States ◽  
Field Experiments ◽  
The United States ◽  
Application Rate ◽  
Herbicide Application ◽  
Soybean Yield ◽  
Agronomic Crops ◽  
Split Plot ◽  
Main Plot ◽  
Biomass Reduction

Abstract Velvetleaf is an economically important weed in agronomic crops in Nebraska and the United States. Dicamba applied alone usually does not provide complete velvetleaf control, particularly when velvetleaf is greater than 15 cm tall. The objectives of this experiment were to evaluate the interaction of dicamba, fluthiacet-methyl, and glyphosate applied alone or in a mixture in two- or three-way combinations for velvetleaf control in dicamba/glyphosate-resistant (DGR) soybean and to evaluate whether velvetleaf height (≤ 12 cm or ≤ 20 cm) at the time of herbicide application influences herbicide efficacy, velvetleaf density, biomass, and soybean yield. Field experiments were conducted near Clay Center, Nebraska in 2019 and 2020. The experiment was arranged in a split-plot with velvetleaf height (≤ 12 cm or ≤ 20 cm) as the main plot treatment and herbicides as sub-plot treatment. Fluthiacet provided ≥ 94% velvetleaf control 28 d after treatment (DAT) and ≥ 96% biomass reduction regardless of application rate or velvetleaf height. Velvetleaf control was 31% to 74% at 28 DAT when dicamba or glyphosate was applied alone to velvetleaf ≤ 20 cm tall compared with 47% to 100% control applied to ≤ 12 cm tall plants. Dicamba applied alone to ≤ 20 cm tall velvetleaf provided < 75% control and < 87% biomass reduction 28 DAT compared with ≥ 90% control with dicamba at 560 g ae ha−1 + fluthiacet at 7.2 g ai ha−1 or glyphosate at 1,260 g ae ha−1. Dicmaba at 280 g ae ha−1 + glyphosate at 630 g ae ha−1 applied to ≤ 20 cm tall velvetleaf resulted in 86% control 28 DAT compared with the expected 99% control. The interaction of dicamba + fluthiacet + glyphosate was additive for velvetleaf control and biomass reduction regardless of application rate and velvetleaf height.

Timing of Soil-Residual Herbicide Applications for Control of Giant Ragweed (Ambrosia trifida)

2015 ◽  
Vol 29 (4) ◽  
pp. 771-781 ◽  
Author(s):  
R. Joseph Wuerffel ◽  
Julie M. Young ◽  
Joseph L. Matthews ◽  
Vince M. Davis ◽  
William G. Johnson ◽  
...  
Keyword(s):  
Field Experiments ◽  
Early Spring ◽  
Late Spring ◽  
Weed Species ◽  
Southern Illinois ◽  
Application Timing ◽  
Late Fall ◽  
Emergence Patterns ◽  
Giant Ragweed ◽  
Residual Control

Fall-applied residual and spring preplant burn-down herbicide applications are typically used to control winter annual weeds and may also provide early-season residual control of summer annual weed species such as giant ragweed. Field experiments were conducted from 2006 to 2008 in southern Illinois to (1) assess the emergence pattern of giant ragweed, (2) evaluate the efficacy of several herbicides commonly used for soil-residual control of giant ragweed, and (3) investigate the optimal application timing of soil-residual herbicides for control of giant ragweed. Six herbicide treatments were applied at four application timings: early fall, late fall, early spring, and late spring. Giant ragweed first emerged in mid- and late-March in 2007 and 2008, respectively. The duration of emergence varied by year, with 95% of emergence complete in late May of 2008, but not until early July in 2007. Giant ragweed emergence occurred more quickly in plots that received a fall application of glyphosate + 2,4-D compared with the nontreated. Fall-applied residual herbicides did not reduce giant ragweed emergence in 2007 when compared with the nontreated, with the exception of chlorimuron + tribenuron applied in late fall. Giant ragweed control from early- and late-spring herbicide applications was variable by year. In 2007, saflufenacil (50 and 100 g ai ha−1) and simazine applied in early spring reduced giant ragweed densities by 95% or greater through mid-May; however, in 2008, early-spring applications failed to reduce giant ragweed emergence in mid-April. The only treatments that reduced giant ragweed densities by > 80% through early July were late-spring applications of chlorimuron + tribenuron or saflufenacil at 100 g ha−1. Thus, the emergence patterns of giant ragweed in southern Illinois dictates that best management with herbicides would include late-spring applications of soil-residual herbicides just before crop planting and most likely requires subsequent control with foliar or soil-residual herbicides after crop emergence.

scholarly journals The influence of Ambrosia trifida on vegetative production of A. artemisiifolia

2020 ◽  
Vol 35 (2) ◽  
pp. 105-115
Author(s):  
Aleksandra Savic ◽  
Ana Mileusnic ◽  
Danijela Pavlovic ◽  
Dragana Bozic ◽  
Sava Vrbnicanin
Keyword(s):  
Crop Yields ◽  
Dry Mass ◽  
Ambrosia Artemisiifolia ◽  
Average Height ◽  
Weed Species ◽  
Ambrosia Trifida ◽  
The Social ◽  
Giant Ragweed ◽  
Density Ratios ◽  
Agricultural Regions

Ambrosia artemisiifolia (common ragweed) and A. trifida (giant ragweed) are very important weed species that are invasive in Serbia and are often found in agricultural regions. When these weeds are present at high densities, crop yields can be significantly reduced or even completely destroyed. Unlike A. artemisiifolia, A. trifida is locally present in the Central Backa region (Vojvodina province), and it is expected that its area of distribution will expand in the future. Starting from the assumption that future distribution of A. trifida could take on larger proportions than now, the aim of this study was focused on examining the interaction between these two species. Experiments were conducted using the replacement design model, in which Ambrosia trifida/Ambrosia artemisiifolia per m2, were planted as density ratios of 10/0; 8/2; 4/6; 6/4; 2/8, and 0/10, in a completely randomized block system with four replications. The vegetative parameters (height and dry mass) of A. artemisiifolia were measured in July, August and September over a period of two years (2016 and 2017), and the results were statistically analysed in the Statistical Package for the Social Sciences (SPSS 23). In July 2016, the average height of A. artemisiifolia was in the range between 35.00 and 50.40 cm, in August it was from 68.00 to 95.50 cm, and between 83.75 and 99.80 cm in September. In the following season (2017), the corresponding values ranged from 56.19 to 78.50 (July), 98.38 to 125.50 cm (August) and 111.19 to 148.50 (September). An increase in the number of A. artemisiifolia plants and decrease in A. trifida counts per m2 caused an increase in the dry mass of A. artemisiifolia per plant. The dry mass of A. artemisiifolia ranged from 4.22 to 6.11 g/plant (July), 8.96 to 10.27 g/plant (August) and 7.04 to 19.53 g/plant (September). In the following season, these values ranged from 9.62 to 14.60 g/plant, 14.37 to 28.90 g/plant, and 23.43 to 40.47 g/plant in July, August and September, respectively. Minimum values of vegetative parameters were recorded in the treatment with 2 plants, and maximum in the treatment with 10 A. artemisiifolia plants/m2. This means that interspecific competition is more pronounced in this ragweed species than intraspecific competition.

Giant Ragweed (Ambrosia trifida) Control in Soybean (Glycine max)

1992 ◽  
Vol 6 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Jerry A. Baysinger ◽  
Barry D. Sims
Keyword(s):  
Soil Moisture ◽  
Glycine Max ◽  
Seed Production ◽  
Field Experiments ◽  
Ambrosia Trifida ◽  
Early Season ◽  
Giant Ragweed ◽  
Herbicide Treatments ◽  
Southeast Missouri

Two field experiments were established in 1988 and 1989 in southeast Missouri to evaluate several herbicides and herbicide combinations for giant ragweed control in soybean. In 1988, a timely rainfall was not received for soil-applied herbicides and giant ragweed control was less than 75%. However, in 1989 soil moisture was sufficient for uptake of soil-applied herbicides and early season giant ragweed control was generally greater than 80%. Chlorimuron, chlorimuron plus 2,4-DB, imazaquin plus 2,4-DB, acifluorfen followed by naptalam plus 2,4-DB, fomesafen, and imazethapyr applied to 2.5 to 5-cm giant ragweed controlled more than 85% in 1988. In 1989, all POST treatments except imazaquin controlled more than 81% of giant ragweed 2 wk after treatments. Imazethapyr controlled seedling giant ragweed at heights up to 12 to 25 cm. Giant ragweed regrowth and/or reinfestation and giant ragweed seed production occurred with all herbicide treatments.

scholarly journals First Report of Powdery Mildew Caused by Golovinomyces ambrosiae on Ambrosia trifida in Korea

Plant Disease ◽  
2011 ◽  
Vol 95 (11) ◽  
pp. 1480-1480 ◽  
Author(s):  
S. E. Cho ◽  
J. H. Park ◽  
M. J. Park ◽  
H. D. Shin
Keyword(s):  
North America ◽  
Powdery Mildew ◽  
Disease Incidence ◽  
Morphological Characteristics ◽  
The United States ◽  
Agricultural Science ◽  
Limiting Factor ◽  
Ambrosia Trifida ◽  
Giant Ragweed ◽  
Noxious Weed

Ambrosia trifida L., commonly known as giant ragweed, is native to North America and was introduced to Korea in the 1970s (3). It is now widely naturalized, and since 1999, has been designated as one of 11 ‘harmful nonindigenous plants’ by the Korean Ministry of Environment because of its adverse effects on native plants. Various strategies to eradicate this noxious weed have been tried without any success (3). In September 2009, powdery mildew infections of giant ragweed were found for the first time in Dongducheon, Korea, and specimens were isolated and deposited in the Korea University Herbarium (KUS-F24683). White mycelial and conidial growth was present mostly on adaxial leaf surfaces with sparse growth on abaxial leaf sides. Severely infected leaves were malformed. Slight purplish discoloration occurred on the leaves contiguous with colony growth. Mycelial colonies were conspicuous, amphigenous, and epiphytic with indistinct to nipple-shaped appressoria. Conidiophores were 80 to 180 μm long and produced two to five immature conidia in chains. Conidia were ellipsoid or doliiform, 28 to 38 × 16 to 24 μm, and lacked distinct fibrosin bodies. Chasmothecia were amphigenous, scattered or partly clustered, dark brown, spherical, 95 to 130 μm in diameter, and contained 6 to 16 asci. Appendages were mycelioid, numbering 10 to 24 per chasmothecium, 0.5 to 2.5 times as long as the chasmothecial diameter, 1 to 4 septate, and were brown at the base and becoming paler toward the tip. Asci were short stalked, 50 to 75 × 32 to 42 μm and contained two spores. Ascospores were ellipsoid-ovoid with a dimension of 22 to 30 × 15 to 18 μm. On the basis of these morphological characteristics, this fungus was identified as Golovinomyces ambrosiae (Schwein.) U. Braun & R.T.A. Cook (= G. cichoracearum var. latisporus (U. Braun) U. Braun) (1). To confirm the identification, the complete internal transcribed spacer (ITS) region of rDNA from KUS-F24683 was amplified with the primers ITS5 and P3 and sequenced (4). The resulting sequence of 508 bp was deposited in GenBank (Accession No. JF907589) and was identical to the ITS sequences of G. ambropsiae on A. artemisiifolia var. elatior from Japan (AB077631) and Korea (JF919680) as well as on A. trifida from the United States (AF011292). Therefore, the sequence analysis verified the pathogen to be G. ambrosiae. To our knowledge, this is the first record of powdery mildew infections on giant ragweed outside of North America (2). Although the disease incidence is still low, the disease could be a limiting factor to suppress the expansion of this noxious weed in Korea. References: (1) U. Braun and R. T. A. Cook. Mycol. Res. 113:616, 2009. (2) D. F. Farr and A. Y. Rossman. Fungal Databases. Systematic Mycology and Microbiology Laboratory, ARS, USDA. Retrieved from http://nt.ars-grin.gov/fungaldatabases/ , May 5, 2011. (3) S. M. Oh et al. Impacts of Invasive Alien Weeds and Control Strategies of Noxious Weeds in Korea. National Institute of Agricultural Science and Technology, Suwon, Korea, 2007. (4) S. Takamatsu et al. Mycol. Res. 111:117, 2009.

Functional relationships between giant ragweed (Ambrosia trifida) interference and sweet corn yield and ear traits

Weed Science ◽  
2006 ◽  
Vol 54 (5) ◽  
pp. 948-953 ◽  
Author(s):  
Martin M. Williams ◽  
John B. Masiunas
Keyword(s):  
Field Experiments ◽  
Yield Loss ◽  
Sweet Corn ◽  
Initial Slope ◽  
Hyperbolic Model ◽  
Corn Yield ◽  
Fresh Market ◽  
Ambrosia Trifida ◽  
Functional Relationships ◽  
Giant Ragweed

Field experiments were conducted to quantify functional relationships between giant ragweed density and sweet corn yield and ear traits. A rectangular hyperbolic model was fit to yield loss measured in terms of marketable ear mass, appropriate for the processing industry, and boxes of 50 marketable ears, relevant to the fresh market industry. The initial slope of the hyperbolic yield loss function (I), which describes the linear portion of yield loss as weed density (weeds per square meter) approaches zero, was 119 for loss of ear mass and 97 for loss of boxes of ears. Furthermore, 10 of 12 ear traits including green ear mass, husked ear mass, ear length, filled ear length, ear width, number of kernels per row, number of rows, kernel depth, kernel mass, and kernel moisture content were significantly affected by giant ragweed interference.

Control Strategies for Common Dandelion (Taraxacum officinale) in No-Tillage Cropping Systems

2007 ◽  
Vol 21 (1) ◽  
pp. 18-22 ◽  
Author(s):  
Aaron S. Franssen ◽  
James J. Kells
Keyword(s):  
Field Experiments ◽  
Cropping Systems ◽  
Control Strategies ◽  
The United States ◽  
Early Spring ◽  
No Tillage ◽  
Application Timing ◽  
The North ◽  
Sequential Treatments ◽  
Common Dandelion

Common dandelion has developed into a troublesome agronomic weed for no-tillage corn and soybean producers in Michigan and throughout the north central region of the United States. Field experiments were conducted on established populations of common dandelion in 2001 to 2002 and 2002 to 2003 to evaluate the effect of preplant and sequential herbicide applications on established populations of common dandelion. Preplant treatments of glyphosate or 2,4-D ester were applied early fall, late fall, early spring, and late spring. For both glyphosate and 2,4-D ester, the fall applications were more effective than the spring applications. Glyphosate at 840 gae/ha was more effective than 2,4-D ester at 1,120 gae/ha at each application timing. A single application of glyphosate or 2,4-D ester applied either in the fall or spring did not provide season-long control of common dandelion. Sequential treatments of glyphosate following preplant applications of either glyphosate or 2,4-D ester provided season-long control of common dandelion.

Control of glyphosate-resistant horseweed and giant ragweed in soybean with halauxifen-methyl applied preplant

2020 ◽  
pp. 1-20
Author(s):  
Jessica Quinn ◽  
Jamshid Ashigh ◽  
Nader Soltani ◽  
David C. Hooker ◽  
Darren E. Robinson ◽  
...  
Keyword(s):  
United States ◽  
Crop Yield ◽  
Field Experiments ◽  
The United States ◽  
Effective Control ◽  
Weed Species ◽  
Giant Ragweed ◽  
Chlorimuron Ethyl ◽  
New Challenges ◽  
Annual Weeds

Abstract Horseweed and giant ragweed are competitive, annual weeds that can negatively impact crop yield. Biotypes of glyphosate-resistant (GR) giant ragweed and horseweed were first reported in 2008 and 2010 in Ontario, respectively. GR horseweed has spread throughout the southern portion of the province. The presence of GR biotypes poses new challenges for soybean producers in Canada and the United States. Halauxifen-methyl is a recently registered selective herbicide for broadleaf weeds, for preplant use in corn and soybean. There is limited literature on the efficacy of halauxifen-methyl on GR horseweed and giant ragweed when combined with currently registered products in Canada. The purpose of the experiment was to determine the effectiveness of halauxifen-methyl applied alone, and tank-mixed for GR giant ragweed and GR horseweed control in glyphosate and dicamba-resistant (GDR) soybean in southwestern Ontario. Six field experiments were conducted separately for each weed species over 2018 and 2019. Halauxifen-methyl applied alone controlled GR horseweed 72% at 8 weeks after application (WAA). Control was improved to >91% when halauxifen-methyl applied in combination with metribuzin, saflufenacil, chlorimuron-ethyl + metribuzin and saflufenacil + metribuzin. At 8 WAA, halauxifen-methyl controlled GR giant ragweed 11%; glyphosate/2,4-D choline, glyphosate/dicamba, glyphosate/2,4-D choline + halauxifen-methyl and glyphosate/dicamba + halauxifen-methyl controlled GR giant ragweed 76 to 88%. This study concluded that halauxifen-methyl applied preplant in a tank-mixture can provide effective control of GR giant ragweed and horseweed in GDR soybean.

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