Glyphosate-resistant Canada fleabane (Conyza canadensis (L.) Cronq.) in Ontario: Distribution and Control in Soybean (Glycine max (L.) Merr.): Essex, Leamington, Wheatley, and Windsor, Essex County, Ontario [Canada] 2011 and 2012

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Byker, Holly; Sikkema, Peter, 2013, "Glyphosate-resistant Canada fleabane (Conyza canadensis (L.) Cronq.) in Ontario: Distribution and Control in Soybean (Glycine max (L.) Merr.): Essex, Leamington, Wheatley, and Windsor, Essex County, Ontario [Canada] 2011 and 2012", https://hdl.handle.net/10864/S52LF, Borealis, V5

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Description	This dataset is comprised of two surveys examining the control of glyphosate resistant Canada Fleabane in soybean with 1) preplant herbicide tankmixes and 2) postemergence herbicides. The objective of the first survey was to identify preplant herbicide tankmixes that provide effective control of glyphosate-resistant Canada fleabane. Twelve field trials were conducted over a two year period (2011, 2012) at four farm locations in Essex County, Ontario to evaluate preplant herbicide tankmixes in glyphosate-resistant soybean for the control of Canada fleabane populations previously identified to be resistant to glyphosate. The first trial evaluated herbicides applied preplant with limited residual activity (Enhanced Burndown) while the second trial evaluated herbicides with residual activity for season long weed control (Burndown plus Residual). The objective of the second survey was to evaluate glyphosate and postemergence soybean herbicide efficacy on glyphosate-resistant Canada fleabane. Twelve field trials were conducted over a two year period (2011, 2012) at four farm locations in Essex County, Ontario. The first set of trials evaluated the level of glyphosate resistance in these populations (Biologically Effective Rate of Glyphosate) while the second set evaluated herbicides applied following soybean emergence (Postemergence Tankmixes). (2013-11-18)
Subject	Agricultural Sciences
Keyword	Canada fleabane, Canada horseweed, Conyza canadensis (L.) Cronq., Erigeron canadensis (L.), Glycine max (L.) Merr., Glyphosate-resistant, herbicide, postemergence, preplant, soybean
Related Publication	Byker, Holly, P. Glyphosate-resistant Canada fleabane (Conyza canadensis (L.) Cronq.) in Ontario: Distribution and Control in Soybean (Glycine max (L.) Merr). M.Sc. in Plant Agriculture. University of Guelph. 2013. Available at:
Notes	Subject: Terminology Type: 1. Notes: Common names for Conyza canadensis (formerly Erigeron canadensis L.) include Horseweed, Canada horseweed, Canada fleabane, Coltstail, Marestail and Butterweed.;Subject: Date Type: 2. Notes: All dates are recorded as YearMonthDay (YYYYMMDD);
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	1 to 10 of 35 Files	Original Format Archival Format (.tab)
	FCWM_GRCF_HB_POST_BER_CF_YLD_2011.tab Tabular Data - 32.2 KB Published Dec 5, 2013 54 Downloads 12 Variables, 384 Observations UNF:5:TGZurKuY9z3DtMfzJZBQPQ== 2011 Biologically Effective Rate of Glyphosate Trials - Canada fleabane Yield Data Postemergence Herbicide Experiment	Access File File Access Public Download Options CSV (w/SPSS card) (Original File Format) Tab-Delimited RData Download Metadata Variable Metadata Data File Citation EndNote XML RIS BibTeX Explore Options Data Explorer
	FCWM_GRCF_HB_POST_BER_CF_YLD_2012.tab Tabular Data - 20.0 KB Published Dec 5, 2013 47 Downloads 8 Variables, 288 Observations UNF:5:Dl0+rBVfgQRyTFHhQqBLkw== 2012 Biologically Effective Rate of Glyphosate Trials - Canada fleabane Yield Data Postemergence Herbicide Experiment	Access File File Access Public Download Options CSV (w/SPSS card) (Original File Format) Tab-Delimited RData Download Metadata Variable Metadata Data File Citation EndNote XML RIS BibTeX Explore Options Data Explorer
	FCWM_GRCF_HB_POST_BER_CodeBook_2011.pdf Adobe PDF - 334.8 KB Published Dec 5, 2013 2 Downloads MD5: 550faffc256433d1a0f745193f04b4a3 2011 Biologically Effective Rate of Glyphosate Trials - Codebook. This codebook provides an explanation of variables and codes found in all of the files relating to the 2011 Postemergence Biologically Effective Rate of Glyphosate Trials. Postemergence Herbicide Experiment	Preview "FCWM_GRCF_HB_POST_BER_CodeBook_2011.pdf" Access File File Access Public Download Options Adobe PDF Download Metadata Data File Citation EndNote XML RIS BibTeX Explore Options Read Document
	FCWM_GRCF_HB_POST_BER_CodeBook_2012.pdf Adobe PDF - 305.0 KB Published Dec 5, 2013 0 Downloads MD5: bd71ba834378b63c7afd94bc0feed39b 2012 Biologically Effective Rate of Glyphosate Trials - Codebook. This codebook provides an explanation of variables and codes found in all of the files relating to the 2012 Postemergence Biologically Effective Rate of Glyphosate Trials. Postemergence Herbicide Experiment	Preview "FCWM_GRCF_HB_POST_BER_CodeBook_2012.pdf" Access File File Access Public Download Options Adobe PDF Download Metadata Data File Citation EndNote XML RIS BibTeX Explore Options Read Document
	FCWM_GRCF_HB_POST_BER_RESPONSE_2011.tab Tabular Data - 89.4 KB Published Dec 5, 2013 46 Downloads 12 Variables, 1440 Observations UNF:5:IowiUoH6vfJxbMUOFojXUA== 2011 Biologically Effective Rate of Glyphosate Trials - Response Data Postemergence Herbicide Experiment	Access File File Access Public Download Options CSV (w/SPSS card) (Original File Format) Tab-Delimited RData Download Metadata Variable Metadata Data File Citation EndNote XML RIS BibTeX Explore Options Data Explorer
	FCWM_GRCF_HB_POST_BER_RESPONSE_2012.tab Tabular Data - 44.7 KB Published Dec 5, 2013 46 Downloads 8 Variables, 912 Observations UNF:5:/KYMzqxiEuBlOxcM2OBoXQ== 2012 Biologically Effective Rate of Glyphosate Trials - Response Data Postemergence Herbicide Experiment	Access File File Access Public Download Options CSV (w/SPSS card) (Original File Format) Tab-Delimited RData Download Metadata Variable Metadata Data File Citation EndNote XML RIS BibTeX Explore Options Data Explorer
	FCWM_GRCF_HB_POST_BER_SITEDESCRIP_2011.tab Tabular Data - 2.2 KB Published Dec 5, 2013 46 Downloads 71 Variables, 4 Observations UNF:5:XzmeFSvp5/m69+wESKNUXw== 2011 Biologically Effective Rate of Glyphosate Trials - Site Description Postemergence Herbicide Experiment	Access File File Access Public Download Options CSV (w/SPSS card) (Original File Format) Tab-Delimited RData Download Metadata Variable Metadata Data File Citation EndNote XML RIS BibTeX Explore Options Data Explorer
	FCWM_GRCF_HB_POST_BER_SITEDESCRIP_2012.tab Tabular Data - 1.4 KB Published Dec 5, 2013 48 Downloads 66 Variables, 3 Observations UNF:5:2Il6ALkCrCLdlOptS/t8Vw== 2012 Biologically Effective Rate of Glyphosate Trials - Site Description Postemergence Herbicide Experiment	Access File File Access Public Download Options CSV (w/SPSS card) (Original File Format) Tab-Delimited RData Download Metadata Variable Metadata Data File Citation EndNote XML RIS BibTeX Explore Options Data Explorer
	FCWM_GRCF_HB_POST_BER_SOY_YLD_2012.tab Tabular Data - 3.3 KB Published Dec 5, 2013 46 Downloads 8 Variables, 48 Observations UNF:5:8AtJ7xm84e1OrDuaY9Yhmg== 2012 Biologically Effective Rate of Glyphosate Trials - Soybean Yield Data Postemergence Herbicide Experiment	Access File File Access Public Download Options CSV (w/SPSS card) (Original File Format) Tab-Delimited RData Download Metadata Variable Metadata Data File Citation EndNote XML RIS BibTeX Explore Options Data Explorer
	FCWM_GRCF_HB_POST_PT_CF_YLD_2011.tab Tabular Data - 27.6 KB Published Dec 5, 2013 46 Downloads 12 Variables, 336 Observations UNF:5:xM6aP1ne9TM99M3X2ekTPg== 2011 Postemergence Tankmix Trials - Canada fleabane Yield Data Postemergence Herbicide Experiment	Access File File Access Public Download Options CSV (w/SPSS card) (Original File Format) Tab-Delimited RData Download Metadata Variable Metadata Data File Citation EndNote XML RIS BibTeX Explore Options Data Explorer

Citation Metadata

Persistent Identifier	hdl:10864/S52LF
Publication Date	2013-12-06
Title	Glyphosate-resistant Canada fleabane (Conyza canadensis (L.) Cronq.) in Ontario: Distribution and Control in Soybean (Glycine max (L.) Merr.): Essex, Leamington, Wheatley, and Windsor, Essex County, Ontario [Canada] 2011 and 2012
Subtitle	Control of glyphosate-resistant Canada fleabane (Conyza canadensis (L.) Cronq.) with preplant herbicide tankmixes in soybean (Glycine max (L.) Merr.); Glyphosate-resistant Canada fleabane (Conyza canadensis (L.) Cronq.) dose response to glyphosate and control with postemergence herbicides in soybean (Glycine max (L.) Merr.) in Ontario
Other Identifier	AERDR: OAERDR_009_E_2011-2012
Author	Byker, Holly (Department of Plant Agriculture. Ontario Agricultural College. University of Guelph Ridgetown Campus) Sikkema, Peter (Department of Plant Agriculture. Ontario Agricultural College. University of Guelph Ridgetown Campus)
Point of Contact	Use email button above to contact. Kramer, Chris (Department of Plant Agriculture. Ontario Agricultural College. University of Guelph Ridgetown Campus)
Description	This dataset is comprised of two surveys examining the control of glyphosate resistant Canada Fleabane in soybean with 1) preplant herbicide tankmixes and 2) postemergence herbicides. The objective of the first survey was to identify preplant herbicide tankmixes that provide effective control of glyphosate-resistant Canada fleabane. Twelve field trials were conducted over a two year period (2011, 2012) at four farm locations in Essex County, Ontario to evaluate preplant herbicide tankmixes in glyphosate-resistant soybean for the control of Canada fleabane populations previously identified to be resistant to glyphosate. The first trial evaluated herbicides applied preplant with limited residual activity (Enhanced Burndown) while the second trial evaluated herbicides with residual activity for season long weed control (Burndown plus Residual). The objective of the second survey was to evaluate glyphosate and postemergence soybean herbicide efficacy on glyphosate-resistant Canada fleabane. Twelve field trials were conducted over a two year period (2011, 2012) at four farm locations in Essex County, Ontario. The first set of trials evaluated the level of glyphosate resistance in these populations (Biologically Effective Rate of Glyphosate) while the second set evaluated herbicides applied following soybean emergence (Postemergence Tankmixes). (2013-11-18)
Subject	Agricultural Sciences
Keyword	Canada fleabane Canada horseweed Conyza canadensis (L.) Cronq. Erigeron canadensis (L.) Glycine max (L.) Merr. Glyphosate-resistant herbicide postemergence preplant soybean
Topic Classification	Agriculture (LOC Subject Headings) http://www.loc.gov/catdir/cpso/lcco/ Plant Culture (LOC Subject Headings) http://www.loc.gov/catdir/cpso/lcco/ Pests and Diseases (LOC Subject Headings) http://www.loc.gov/catdir/cpso/lcco/ Weeds, parasitic plants (LOC Subject Headings) http://www.loc.gov/catdir/cpso/lcco/
Related Publication	Byker, Holly, P. Glyphosate-resistant Canada fleabane (Conyza canadensis (L.) Cronq.) in Ontario: Distribution and Control in Soybean (Glycine max (L.) Merr). M.Sc. in Plant Agriculture. University of Guelph. 2013. Available at: http://hdl.handle.net/10214/6582
Notes	Subject: Terminology Type: 1. Notes: Common names for Conyza canadensis (formerly Erigeron canadensis L.) include Horseweed, Canada horseweed, Canada fleabane, Coltstail, Marestail and Butterweed.;Subject: Date Type: 2. Notes: All dates are recorded as YearMonthDay (YYYYMMDD);
Producer	Byker, Holly (Department of Plant Agriculture. Ontario Agricultural College. University of Guelph Ridgetown Campus) Sikkema, Peter (Department of Plant Agriculture. Ontario Agricultural College. University of Guelph Ridgetown Campus)
Production Date	2012
Production Location	Department of Plant Agriculture. University of Guelph Ridgetown Campus
Funding Information	Monsanto Canada Inc. The Grain Farmers of Ontario The Agricultural Adaptation Council
Distributor	Agri-environmental Research Data Repository (University of Guelph) (AERDR)
Depositor	Kramer, Chris
Deposit Date	2013-10-30
Time Period	Start Date: 2011 ; End Date: 2012
Date of Collection	Start Date: 2011 ; End Date: 2012
Data Type	Experimental
Series	Field Crop Weed Management: University of Guelph Ridgetown Campus Field Crop Weed Management research program is focused on addressing current weed management problems on the farm in corn, soybeans, wheat and edible beans.
Software	SAS, Version: 9.1 ARM, Gylling Data Management, Inc. (GDM)

Geospatial Metadata

Geographic Coverage	Canada Ontario Essex Leamington Wheatley Windsor

Social Science and Humanities Metadata

Unit of Analysis	Geographical Unit
Universe	Experimental plots on farms located in Essex, Leamington, Wheatley and Windsor, Ontario, Canada.
Time Method	TimeSeries
Data Collector	Byker, Holly; Kramer, Chris
Frequency	Annual; Two-year period; Measurements taken 1, 2, 4, and 8 weeks after herbicide application
Sampling Procedure	Each experiment was arranged in a randomized complete block design with four replications. Plots were 2 m by 8 m, except at the Leamington location where plot length was decreased to 6 m due to space constraints. For the preplant survey, herbicides were applied early in the spring prior to soybean planting. For the postemergence survey, herbicides were applied following soybean emergence when Canada fleabane plants were up to 26 cm in diameter. Herbicides were applied using using a CO2 pressurized backpack sprayer calibrated to deliver a spray volume of 200L ha-1 at 240 kPa. The boom was 1.5 m wide with four ultra-low drift nozzles (ULD120-02, Hypro, New Brighton, MN) spaced 50 cm apart. Untreated control and weed free control plots were included in each replicate of each trial. A description of the herbicide types and application rates can be found in the Codebook for the corresponding survey. Weed free controls were sprayed preplant with glyphosate (1800 g a.e. ha-1) and saflufenacil/dimethenamid (245 g a.i. ha-1) or glyphosate and 2,4-D ester (500 g a.e. ha-1) and maintained weed free using hand hoeing as required. Herbicide rates applied are the highest label rates registered for use in Ontario. Canada fleabane control was visually estimated on a scale of 0 (no control) to 100% (complete plant death). For the preplant survey, Canada fleabane control was estimated at 1, 2 and 4 weeks after herbicide application (WAA) for the Enhanced Burndown trial and 1, 2, 4 and 8 WAA for the Burndown plus Residual trial. Estimates of soybean injury were also made on these dates. For the postemergence survey, Canada fleabane control was estimated at 1, 2, 4 and 8 weeks after herbicide application (WAA). Estimates of soybean injury were also made on these dates. Injury ratings were recorded on a scale of 0 to 100%, with 0 defined as no soybean injury and 100 as soybean death. Canada fleabane density and dry weight were evaluated 4 WAA in the Enhanced Burndown trial and Biologically Effective Rate trial and 8 WAA in the Burndown plus Residual trial and Postemergence Tankmixes trial by counting and then cutting the plants at the soil surface from two 0.25 m2 quadrats per plot. Plants were dried at 60 C to constant moisture and then weighed.
Major Deviations for Sample Design	NOTE: For the 2012 Enhanced Burndown Trial ID CFGR12A1A, maintenance was performed using a cover spray of Glyphosate + ASSURE mix applied on 20120704.
Collection Mode	Physical measurement
Type of Research Instrument	Structured

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The original creators of the data, Holly Byker, Department of Plant Agriculture, Ontario Agricultural College, University of Guelph, Chris Kramer, Department of Plant Agriculture, Ontario Agricultural College, University of Guelph and Peter Sikkema, Department of Plant Agriculture, Ontario Agricultural College, University of Guelph and Monsanto Canada Inc., the Grain Farmers of Ontario and the Agricultural Adaptation Council bear no responsibility for uses of this data set or for interpretations or inferences upon such uses.

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License/Data Use Agreement

Our Community Norms as well as good scientific practices expect that proper credit is given via citation. Please use the data citation shown on the dataset page.

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Terms of Use This dataset is made available with limited information on how it can be used. You may wish to communicate with the Contact(s) specified before use.

Citation Requirements The publishing of analysis and results from research using any of the data products is permitted in research communication such as scholarly papers, journals and the like. The authors of these communications are required to cite the primary investigators, Baker, Holly et al (2013) as the source of these data, and to indicate that the results or views expressed are those of the author/authorized user and are not those of the primary investigators.

Disclaimer The original creators of the data, Holly Byker, Department of Plant Agriculture, Ontario Agricultural College, University of Guelph, Chris Kramer, Department of Plant Agriculture, Ontario Agricultural College, University of Guelph and Peter Sikkema, Department of Plant Agriculture, Ontario Agricultural College, University of Guelph and Monsanto Canada Inc., the Grain Farmers of Ontario and the Agricultural Adaptation Council bear no responsibility for uses of this data set or for interpretations or inferences upon such uses.

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