Influence of Herbicide Programs on Glyphosate-Resistant Giant Ragweed (Ambrosia trifida L.) Density, Soybean Yield, and Net Economic Return in Glyphosate- and Glufosinate-Resistant Soybean

2014 ◽  
Vol 13 (1) ◽  
pp. CM-2013-0015b-RS ◽  
Author(s):  
Eric B. Riley ◽  
Raymond E. Massey ◽  
Kevin W. Bradley
Keyword(s):  
Economic Return ◽  
Ambrosia Trifida ◽  
Soybean Yield ◽  
Giant Ragweed ◽  
Herbicide Programs

Influence of herbicide programs on glyphosate-resistant giant ragweed density, soybean yield, and net economic return

Crops & Soils ◽  
2014 ◽  
Vol 47 (3) ◽  
pp. 43-48
Author(s):  
Eric B. Riley ◽  
Raymond E. Massey ◽  
Kevin W. Bradley
Keyword(s):  
Economic Return ◽  
Soybean Yield ◽  
Giant Ragweed ◽  
Herbicide Programs

scholarly journals Integrated Management of Glyphosate-Resistant Giant Ragweed (Ambrosia trifida) with Tillage and Herbicides in Soybean

2016 ◽  
Vol 30 (1) ◽  
pp. 45-56 ◽  
Author(s):  
Zahoor A. Ganie ◽  
Lowell D. Sandell ◽  
Mithila Jugulam ◽  
Greg R. Kruger ◽  
David B. Marx ◽  
...  
Keyword(s):  
Integrated Management ◽  
Acetolactate Synthase ◽  
High Plasticity ◽  
Eastern Canada ◽  
Ambrosia Trifida ◽  
Early Season ◽  
Soybean Yield ◽  
Giant Ragweed ◽  
Contrast Analysis ◽  
Herbicide Programs

Giant ragweed is one of the most competitive annual broadleaf weeds in soybean production fields in the midwestern United States and eastern Canada because of its early emergence, rapid growth rate, high plasticity, and resistance to glyphosate and acetolactate synthase inhibitors. Therefore, early-season management of giant ragweed is critical to avoid yield loss. The objectives of this study were to evaluate control of glyphosate-resistant giant ragweed through the integration of preplant tillage or 2,4-D; PRE or early POST (EPOST) followed by (fb) late POST (LPOST) herbicide programs with or without preplant tillage or 2,4-D; and their effect on soybean injury and yield. A field study was conducted in 2013 and 2014 in David City, NE in a field infested with glyphosate-resistant giant ragweed. Preplant tillage or 2,4-D application provided > 90% control of glyphosate-resistant giant ragweed 14 d after preplant treatment. Giant ragweed control and biomass reduction were consistently > 90% with preplant tillage or 2,4-D fb sulfentrazone plus cloransulam PRE or glyphosate plus cloransulam EPOST fb glyphosate plus fomesafen or lactofen LPOST compared with ≤ 86% control with same treatments without preplant tillage or 2,4-D. PRE or EPOST fb LPOST herbicide programs preceded by preplant treatments resulted in giant ragweed density < 2 plants m−2and soybean yield > 2,400 kg ha−1compared with the density of ≥ 2 plants m−2and soybean yield < 1,800 kg ha−1under PRE or EPOST fb LPOST herbicide programs. The contrast analysis also indicated that preplant tillage or 2,4-D fb a PRE or POST program was more effective for giant ragweed management compared with PRE fb POST herbicide programs. Integration of preplant tillage would provide an alternative method for early-season control of giant ragweed; however, a follow up application of herbicides is needed for season-long control in soybean.

Glyphosate-resistant giant ragweed (Ambrosia trifida L.) control with preplant herbicides in soybean [Glycine max (L.) Merr.]

2012 ◽  
Vol 92 (5) ◽  
pp. 913-922 ◽  
Author(s):  
Joseph P. Vink ◽  
Nader Soltani ◽  
Darren E. Robinson ◽  
François J. Tardif ◽  
Mark B. Lawton ◽  
...  
Keyword(s):  
Glycine Max ◽  
Field Trials ◽  
Yield Losses ◽  
Ambrosia Trifida ◽  
Soybean Yield ◽  
Field Crops ◽  
Giant Ragweed ◽  
Glycine Max L ◽  
Significant Yield ◽  
Residual Control

Vink, J. P., Soltani, N., Robinson, D. E., Tardif, F. J., Lawton, M. B. and Sikkema, P. H. 2012. Glyphosate-resistant giant ragweed ( Ambrosia trifida L.) control with preplant herbicides in soybean [ Glycine max (L.) Merr.]. Can. J. Plant Sci. 92: 913–922. Giant ragweed populations in southwestern Ontario have evolved resistance to glyphosate. Glyphosate-resistant (GR) giant ragweed interference in field crops can lead to significant yield losses. Eleven field trials [five with preplant (PP) burndown only and six with PP burndown plus residual herbicides] were conducted in 2010 and 2011 on Ontario farms with GR giant ragweed to evaluate the efficacy of various PP herbicides applied prior to soybean planting. Glyphosate applied at the recommended field dose failed to adequately control GR giant ragweed. The PP herbicides 2,4-D ester, cloransulam-methyl and saflufenacil applied alone and with glyphosate provided 97–99, 68–100 and 71–94% control, respectively and resulted in soybean yields equivalent to the weed-free check. Combinations of glyphosate plus cloransulam-methyl or linuron controlled GR giant ragweed 8 wk after application (WAA), 75–95 and 95–98%, respectively. Residual control with glyphosate plus linuron resulted in soybean yield equivalent to the weed-free check. Based on these results, GR giant ragweed can be controlled prior to soybean planting in southwestern Ontario.

Giant Ragweed (Ambrosia trifida) Interference in Soybeans (Glycine max)

Weed Science ◽  
1991 ◽  
Vol 39 (3) ◽  
pp. 358-362 ◽  
Author(s):  
Jerry A. Baysinger ◽  
Barry D. Sims
Keyword(s):  
Glycine Max ◽  
Seed Yield ◽  
Field Experiments ◽  
Yield Loss ◽  
Soybean Seed ◽  
Critical Duration ◽  
Ambrosia Trifida ◽  
Soybean Yield ◽  
Giant Ragweed

Field experiments were established near Portageville, MO, to determine the effects of giant ragweed interference in soybeans. Threshold densities of giant ragweed that reduced soybean yield were less than two plants 9 m−1of soybean row. This density reduced soybean seed yield 46 and 50% in 1988 and 1989, respectively, after full-season interference. The critical duration of giant ragweed interference in soybeans was between 4 and 6 weeks after emergence (WAE) in 1988 and between 2 and 4 WAE in 1989. Full-season giant ragweed interference at densities of 220 000 and 360 000 plants ha−1in 1988 and 1989, respectively, resulted in almost complete soybean yield loss. Eight to 10 weeks after emergence of giant ragweed-free conditions were required to prevent soybean yield reductions.

Giant Ragweed (Ambrosia trifida) Canopy Architecture and Interference Studies in Soybean (Glycine max)

1994 ◽  
Vol 8 (3) ◽  
pp. 559-564 ◽  
Author(s):  
Theodore M. Webster ◽  
Mark M. Loux ◽  
Emilie E. Regnier ◽  
S. Kent Harrison
Keyword(s):  
Field Experiments ◽  
Yield Loss ◽  
Canopy Architecture ◽  
Economic Threshold ◽  
Ambrosia Trifida ◽  
Soybean Yield ◽  
Giant Ragweed ◽  
Soybean Canopy ◽  
The Cost ◽  
Interference Studies

Field experiments were established at Columbus and near South Charleston, OH to determine the effects of giant ragweed population density on soybean yield and to characterize the development of giant ragweed grown in 76-cm soybean rows. An economic threshold was calculated for Ohio using a common treatment for giant ragweed control in soybean. A cost of $41/ha was estimated for a farmer to apply 0.56 kg/ha bentazon plus 0.28 kg/ha fomesafen plus COC (1.25% v/v). Assuming a soybean value of $0.22/kg, the cost of control was equivalent to 5.4 and 7.1% of the soybean yield in 1991 and 1992, respectively, which corresponded to the yield loss caused by 0.08 and 0.03 giant ragweed plants/m2. The competitiveness of giant ragweed can be at least partly attributed to its ability to initiate and maintain axillary leaves and branches within the shaded confines of the soybean canopy.

scholarly journals The danger of the spread dangerous quarantine weed — giant ragweed (Ambrosia trifida L.)

2018 ◽  
pp. 83-89
Author(s):  
O. Marieva ◽  
O. Zhuiboroda
Keyword(s):  
Native Species ◽  
High Speed ◽  
Arable Land ◽  
The State ◽  
Natural Vegetation ◽  
Ambrosia Trifida ◽  
Economic Relations ◽  
Grain Crops ◽  
Agricultural Equipment ◽  
Giant Ragweed

The expansion of trade and economic relations with other countries increased the risk of importing new invasive types of weeds into the state. One of them is a serious danger weed — giant ragweed (Ambrosia trifida L.). This weed with high speed and aggressiveness inhabits and displacing native species in agricultural and non-arable land, including landscapes of big cities. A. trifida extends to non-arable lands with disturbed natural vegetation. This species is spreading through the contamination of seeds and agricultural equipment. It damaged soybeans, legumes and corn, as well as other grain crops. Increasing of this weed pollen in the air is a source of a massive disease with allergies. At present, there is danger of entry by this weed to Ukraine from neighboring countries.

scholarly journals Glyphosate-Resistant Giant Ragweed (<i>Ambrosia trifida</i> L.) in Ontario: Dose Response and Control with Postemergence Herbicides

2012 ◽  
Vol 03 (05) ◽  
pp. 608-617 ◽  
Author(s):  
Joseph P. Vink ◽  
Nader Soltani ◽  
Darren E. Robinson ◽  
François J. Tardif ◽  
Mark B. Lawton ◽  
...  
Keyword(s):  
Dose Response ◽  
Ambrosia Trifida ◽  
Giant Ragweed ◽  
And Control ◽  
Postemergence Herbicides

Glyphosate-Resistant Giant Ragweed (Ambrosia trifida) Control with Glufosinate or Fomsafen Combined with Growth Regulator Herbicides

2013 ◽  
Vol 27 (3) ◽  
pp. 454-458 ◽  
Author(s):  
Kelly A. Barnett ◽  
Thomas C. Mueller ◽  
Lawrence E. Steckel
Keyword(s):  
Field Study ◽  
Growth Regulator ◽  
Effective Control ◽  
Ambrosia Trifida ◽  
Herbicide Resistant ◽  
Giant Ragweed ◽  
Herbicide Treatments ◽  
Fallow Field ◽  
Contrast Analysis

The development of crops resistant to 2,4-D, dicamba, and glufosinate may provide new options for the management of glyphosate-resistant (GR) giant ragweed and other herbicide-resistant weeds. A fallow field study was conducted in 2011 and 2012 to determine the control of GR giant ragweed with 2,4-D and dicamba applied alone and in combination with glufosinate or fomesafen. Dicamba and 2,4-D tank-mixed with glufosinate or fomesafen provided the highest level of control at 10 or 20 days after application (DAA). At 30 DAA, all herbicide treatments provided > 88% control of giant ragweed except glyphosate, glufosinate, and 2,4-D alone at 0.56 kg ae ha−1. Glyphosate, glufosinate, and 2,4-D alone at 0.56 kg ae ha−1also had the highest number of giant ragweed plants (> 5.8 plants m−2) and highest biomass (> 19.2 g m−2). Contrast statements between 2,4-D and dicamba indicated no differences among treatments containing these herbicides. However, contrast analysis indicated that herbicides applied alone resulted in 56, 58, and 61% control while tank-mix combinations of 2,4-D or dicamba with glufosinate or fomesafen resulted in 86, 91, and 93% control, respectively. Herbicides applied alone also had more giant ragweed plants and biomass per m−2than herbicides applied in tank-mix combinations. Tank-mixing combinations of 2,4-D and dicamba will be important for effective control of GR giant ragweed.

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