scholarly journals Control of Glyphosate-Resistant Giant Ragweed (<i>Ambrosia trifida</i> L.) with 2,4-D Followed by Pre-Emergence or Post-Emergence Herbicides in Glyphosate-Resistant Soybean (<i>Glycine max</i> L.)

2014 ◽  
Vol 05 (15) ◽  
pp. 2289-2297 ◽  
Author(s):  
Amit J. Jhala ◽  
Lowell D. Sandell ◽  
Greg R. Kruger
Keyword(s):  
Glycine Max ◽  
Ambrosia Trifida ◽  
Giant Ragweed

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.

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.

Time of Application of Cloransulam for Giant Ragweed (Ambrosia trifida) Control in Soybean (Glycine max)

1999 ◽  
Vol 13 (4) ◽  
pp. 825-828 ◽  
Author(s):  
Rebecca J. Franey ◽  
Stephen E. Hart
Keyword(s):  
Glycine Max ◽  
Field Experiments ◽  
Ambrosia Trifida ◽  
Application Timing ◽  
Time Of Application ◽  
Giant Ragweed ◽  
Optimum Application

Field experiments were conducted at Dekalb, IL, in 1996 and 1997 to determine the optimum application timing and rate of cloransulam for giant ragweed (Ambrosia trifida) control in soybean (Glycine max). Cloransulam treatments included preplant incorporated (PPI) and preemergence (PRE) applications of 35 g ai/ha and early postemergence (EPOST), postemergence (POST), and late postemergence (LPOST) applications of 18 or 27 g ai/ha. Cloransulam applied at 18 g/ha was also combined with lactofen at 70 g ai/ha at each POST application timing. At 60 d after LPOST, cloransulam applied PPI provided 68% giant ragweed control in 1996 and 1997 compared to PRE applications, which provided 95 and 25% giant ragweed control, respectively. The reduction in giant ragweed control with PRE applications of cloransulam in 1997 was likely due to insufficient rainfall for activation. Cloransulam applied at 18 g/ha EPOST provided 87 and 88% giant ragweed control, respectively, in 1996 and 1997. Cloransulam applied POST provided 97 and 82% giant ragweed control, respectively, in successive years. Delaying cloransulam application until LPOST reduced giant ragweed control to 53 and 47%, respectively, in 1996 and 1997 compared to EPOST and POST. At EPOST and POST application timings, increasing the rate of cloransulam to 27 g/ha or adding lactofen did not improve giant ragweed control. However, giant ragweed control was improved by at least 20% by increasing the rate of cloransulam to 27 g/ha at LPOST. Similarly, applying cloransulam in combination with lactofen improved giant ragweed control by at least 15% at LPOST.

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.

Glyphosate-Resistant Giant Ragweed (Ambrosia trifida) and Waterhemp (Amaranthus rudis) Management in Dicamba-Resistant Soybean (Glycine max)

2014 ◽  
Vol 28 (1) ◽  
pp. 131-141 ◽  
Author(s):  
Douglas J. Spaunhorst ◽  
Simone Siefert-Higgins ◽  
Kevin W. Bradley
Keyword(s):  
Glycine Max ◽  
Field Experiments ◽  
Treatment Delay ◽  
Weed Species ◽  
Ambrosia Trifida ◽  
Density Reduction ◽  
Giant Ragweed ◽  
Herbicide Treatments ◽  
Amaranthus Rudis ◽  
Integrated Program

Field experiments were conducted across two locations during 2011 and 2012 to evaluate herbicide options for the control of glyphosate-resistant (GR) giant ragweed and GR waterhemp in dicamba-resistant (DR) soybean. All herbicide treatments provided 91 to 100% control of GR giant ragweed 3 wk after treatment (WAT). Flumioxazin plus dicamba plus glyphosate applied preplant provided greater control and density reduction of GR giant ragweed than flumioxazin plus 2,4-D plus glyphosate. When flumioxazin plus dicamba plus glyphosate were applied preplant, the addition of dicamba to glyphosate at either the early-postemergence (EPOST) or mid-postemergence (MPOST) timing provided greater control and density reduction of GR giant ragweed than glyphosate alone. Regardless of the preplant treatment, delay of EPOST dicamba to the MPOST timing did not influence GR giant ragweed control or density reduction. In the GR waterhemp experiment, dicamba plus glyphosate applied sequentially provided 88 to 89% control and 90% density reduction at the EPOST and MPOST timings compared to only 24% control and 42% density reduction in response to glyphosate applied sequentially. Control and GR waterhemp density reduction did not improve with the addition of acetochlor to either the EPOST or late-postemergence (LPOST) timings. Flumioxazin plus chlorimuron applied PRE followed by dicamba plus glyphosate or dicamba plus glyphosate plus acetochlor provided greater control of GR waterhemp than glyphosate plus fomesafen or glyphosate alone applied EPOST. Results from this research indicate that dicamba applied once or sequentially and when timed appropriately to match the biology of the weed species can be utilized as a component of an integrated program for the management of GR weeds like giant ragweed and waterhemp in DR soybean.

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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