Controlling kochia with PRE herbs.

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1 //27 Sorghum Weed Management Update Curtis Thompson, Office: cell: Kochia Management Controlling kochia with herbs. Kochia control with Dec 2th applied herbicide treatments. Tribune KS 2-6. Thompson, Schlegel, and Peterson. 6kocz Mar 27-Apr 2-May 8-Jun Scoparia+atra 2oz+lb Corvus+atra +lb Atrazine lb Atra+Clarity.7+pt Clarity pt Sencor 8oz Zidua+Clarity 2. oz+pt Kochia control with Feb th applied herbicide treatments. Tribune KS 26. Thompson, Schlegel, and Peterson. 6kocz. Weed control in Wheat and wheat stubble following harvest, SWREC Tribune 2. Thompson, Schlegel, and Peterson. whttr Kochia in crop Product Mar 27-Apr 2-May 8-Jun Scoparia+atra 2oz+lb Scoparia+atra+Banvel 2oz+lb+2oz Corvus+atra +lb Corvus+atra+Banvel +lb+2oz Atrazine+Banvel lb+pt Sencor+Banvel 8oz+pt Lb / acre Clarity + 2,-D/ Clarity+2,-D+NIS+AMS Clarity+2,-D+Zidua/ Clarity+2,-D+NIS+AMS Clarity+Zidua/ Clarity+atra+Sharpen+MSO+UAN Clarity+Huskie+NIS/ Atrazine+Sharpen+MSO+UAN Rave+NIS/ Atrazine+Sharpen+MSO+UAN Widematch/ Atrazine+Sharpen+MSO+UAN.2+.7/.+.+.2% /.+.+.2% /.+.+.+%+2.%v/v %v/v /.+.+%+2.%v/v.7+.% v/v /.+.+%+2.%v/v.2/.+.+%+2.%v/v LSD (.) May PreHarv time Flglf Kochia in fallow DAT DAT () Clarity pt

2 //27 Kochia control in wheat stubble with no in wheat crop treatment, SWREC Tribune 2. Thompson, Schlegel, and Peterson. whttr Product Lb/ acre time Clarity+Sharpen+Linex+MSO+UAN Clarity+Atrazine+COC Clarity+atra+Sharpen+MSO+UAN Clarity+atra+Impact+MSO+UAN Atrazine+Impact+MSO+UAN Gramoxone SL+atra+COC Gramoxone SL+Linex+COC Clarity+2,-D+NIS+AMS %+2.% v/v.+.+.%.+.+.+%+2.%v/v %+2.%v/v.+.22+%+2.%v/v.7+.2+% v/v.7+.7+%.+.+.2%+2. Kochia in fallow DAT DAT Sorghum Update 27 Atrazine Issues Inzen sorghum Zest WDG Huskie following pre applied Lumax or Lexar Kochiavore LSD (.) 7 8 Sorghum Update 27 Atrazine Issues Inzen sorghum Zest WDG Huskie following pre applied Lumax or Lexar Atrazine issues AGAIN! Complete EPA review, Timeline yrs! Outcomes? Cancel registration, very unlikely Change labeled rates and total annual rates, likely Alter current uses, very possible Add additional restrictions, very possible Off target movement Atrazine is safe but finding atrazine in ground and surface water, increases the overall problem! Need to be good stewards with atrazine use Best Management Practices for Atrazine KSU publication MF-282 Incorporation reduces losses 67% Apply atrazine prior to April, reduce losses % Split applications, 2/ rate in March and remainder after planting. Reduce losses by % Use to low atrazine rate mixes. Ie Lite formulations Use POST vs applications of atrazine. Lower rates used POST. Can reduce losses by 67% Reduce atrazine rates to pound or less followed by POST. lb if needed. Combined applications improve control. Use other herbicides without atrazine. Can reduce losses by % Vegetative filter strips reduce flow rate and reduce losses by % Buffer zones. Avoid applications near water sources and environmentally sensitive areas. New Weed Control Technology for Grain Sorghum, Inzen + Zest WDG 2

3 //27 Inzen Z sorghum development ALS resistant sorghum lines were developed at KSU by intogressing a gene from resistant shattercane from SW Kansas into grain sorghum lines (Tuinstra and Al-Khatib) Rights to this technology and herbicide development were assumed by DuPont. Currently Pioneer and Advanta have agreements signed with DuPont to produce & market hybrid Inzen sorghums Formulation of nicosulfuron Zest WDG was registered for us in Inzen during 27 however hybrid availability is likely to be on a demonstration scale for 27. Vol. wheat, foxtail and crabgrass control with single and two pass herbicide programs. Vanloenen, Thompson, Stahlman, and Currie, POST /POST Cinch ATZ zine Cinch ATZ fb.2 pt/a.67 oz+ pt/a.2 pt fb.67 oz+ pt/a Vol Wheat Green foxtail Crabgrass-Irr Crabgrass-Dry Manhattan, KS Hays, KS Garden City, KS All POST treatments applied with COC at % v/v and AMS at 2 lb/a Annual grass control with single and two pass herbicide programs. Vanloenan, Thompson, Cramer and Stahlman POST /POST Cinch ATZ Zest + Atrazine Cinch ATZ fb.2 pt/a.67 oz+ pt/a.2 pt fb.67 oz + pt/a Palmer amaranth control with single and two pass herbicide programs. Stahlman etal. and Currie etal POST /POST Cinch ATZ zine Cinch ATZ fb.2 pt/a.67 oz+ pt/a.2 pt fb.67 oz+ pt/a 2 Crabgrass Stinkgrass Crabgrass Yellow foxtail Green foxail Manhattan, KS Hutchinson, KS Hays, KS All POST treatments applied with COC at % v/v and AMS at 2 lb/a 6 2 Hays Garden City-Dry Garden City-Irr All POST treatments applied with COC at % v/v and AMS at 2 Weed control with Zest plus broadleaf herbicide tankmixes applied early postemergence, V-. Stahlman etal Palmer amaranth Puncturevine Greenfoxtail Zest + Atrazine Zest + atrazine+huskie zine+warrant Atrazine+Warrant Zest+Warrant Zest+Facet L Zest WDG (DuPont) for Inzen sorghum Nicosulfuron 7% WDG,.67 to. oz prod./a.2 to.% v/v NIS or % v/v COC 2 qt/a UAN or 2 lb/a AMS Apply to sorghum collar to flagleaf visible, to 2 inch sorghum. Annual grass control varies with species and size of the grass at application. Start with an effective applied herbicides. Zest should be the second part of a two pass system. All POST treatments applied with COC at % v/v and AMS at 2 lb/a

4 //27 Maximum grass species height Zest WDG Restrictions Can be tankmixed with 2,-D LV, dicamba, atrazine, Starane Ultra, and Ally XP, /2 oz. DO NOT USE COC when tankmixing 2,-D or dicamba. DO NOT tankmix with Huskie herbicide as significant grass antagonism may result. Rotation back to sorghum is 8 months NO CONTINUOUS SORGHUM! Zest WDG Rotation Restrictions Yield potential of test cross hybrids resistant to ALS inhibitor herbicides as compared to commercial checks, 2. Tesfaye Tesso and his group, Agronomy Department, K-State. Entry bu/acre Yield as % of the top check PR/- PR/- 2 PR/- PR/-2 22 PR/- PR/-7 PR/- PR/- 28 PR/- PR/-8 PR/- PR/- PR/-2 PR/- 22 PR/-2 PR/- 26 PR/-7 PR/-27 Pioneer G62 - Dekalb 2 - Zest effect on Inzen Z sorghum in 2. Thompson, Schlegel, Crammer, and Peterson, Exp2-27sorg. Manhat Manhat Tribune Tribune Hutch Hutch 7- DAT WAT 2-8 DAT 6- WAT DAT WAT Product rate (% Injury) - Zest+Atrazine Zest+Atra+Ally CZ+Zt+Az+2DLV CZ+Zt+Az+Huskie CZ+Zt+Az+Clarity. oz +.7 lb.+.7+floz fl oz fl oz.+.7+.oz.2 pt/a.2/.+.7+8floz.2/.+.7+oz.2/.+.7+8floz Zest effect on Inzen Z sorghum in 2, NWREC Colby, Stahlman and Jester. Product Chlorosis Necrosis Lb / acre time (%) Zest+Atrazine CZ+Zt+Az+2DLV CZ+Zt+Az+Huskie CZ+Zt+Az+Clarity. oz +.7 lb.+.7+floz fl oz fl oz pt/a.2/.+.7+8floz.2/.+.7+oz.2/.+.7+8floz Epp Epp/Post Epp/Post Epp/Post 2 LSD (.) All injury ratings are visual. 6 LSD (.) All injury ratings are visual.

5 //27 Huskie Injury on conventional sorghum Ciampitti 2 Annual Grass and Velvetleaf control in Inzen sorghum in 2 in Manhattan, Thompson and Peterson. 2,-D injury on sorghum Time SETFA ECHCG lb ai or ae/acre Zest+Atra+Ally CZ/Zt+Az+2DLV / / / TRZAW ABUTH LSD (.) All post treatments applied with COC at % v/v and AMS at 2 lb/a. Shattercane and conventional sorghum control in Inzen sorghum in 2, Currie, Geier, Thompson, Schlegel, Peterson, Cramer. Annual Grass control in Inzen Z sorghum in 2, Currie, Geier, Thompson, and Schlegel. Garden City Time SETVI DIGSA lb ai or ae/acre CZ/Zt+Az+2DLV LSD (.) / / / Tribune ERAME PANCA Time Garden Tribune Manhatt Hutchin City Shattercane/conv. sorghum lb ai or ae/acre CZ/Zt+Az+2DLV LSD (.) / / / All post treatments applied with COC at % v/v and AMS at 2 lb/a. All post treatments applied with COC at % v/v + AMS at 2 lb/a.

6 //27 Punturevine and Tumble pigweed control in Inzen sorghum in 2, Stahlman, Jester, Thompson, and Schlegel. CZ/Zt+Az+2DLV LSD (.) Colby Hays Hays Tribune Time Puncturevine Tumble pigweed lb ai or ae/acre / / / All post treatments applied with COC at % v/v and AMS at 2 lb/a. 6 Palmer amaranth control in Inzen sorghum in 2, Currie, Geier, Stahlman, Jester, Thompson, Peterson, and Cramer. CZ/Zt+Az+2DLV LSD (.) lb ai or ae/acre / / / Time Garden City Colby Manhattan Hutchinson Palmer amaranth All POST treatments applied with COC at % v/v and AMS at 2 lb/a Summary Inzen sorghum Using Zest WDG is one additional strategy for managing annual grasses in grain sorghum This technology will be most successful when used in a two pass herbicide program that includes herbicides Effectiveness of control will depend on grass size at the time of application and condition of the growing plants Effective broadleaf weed control will require the use of applied herbicides and effective broadleaf tankmix partners with post applications of Zest WDG. Statement from the Huskie label Unacceptable crop response may occur if Huskie is applied to acreage that has been previously treated with an application of any product containing mesotrione (products such as Lumax or Lexar). Effect of Huskie on sorghum previous treated with applied mesotrione products, Ashland Bottoms 2. Menzer, Thompson, Jugulam, and Peterson. Bu/a LSD=27 Effect of Huskie on sorghum previous treated with applied mesotrione products, SWREC Tribune. Menzer, Thompson, Schlegel and Peterson 26. Bu/a LSD=6 2 Lumax EZ 2.7 qt Lexar EZ qt Dual II Mag.66 pt Lumax EZ 2.7 qt Lexar EZ qt Zemax 2 qt Bicep Lite II Mag.qt No Pre No Post Huskie 2.8+Atra Huskie 6+Atra Buctril pt+atra No Post Huskie 2.8+Atra Huskie 6+Atra Buctril pt+atra 6

7 //27 Effect of Huskie on sorghum previous treated with applied mesotrione products, Ashland bottoms, Manhattan. Menzer, Thompson, Jugulam, and Peterson 26. Bu/a 2 LSD= Untreated Lumax EZ 2.7 qt Lexar EZ qt Zemax 2 qt Bicep Lite II Mag No Pre.qt No Post Huskie 2.8+Atra Huskie 6+Atra Buctril pt+atra Zest+Atrazine,. oz ai +.7 lb/a All POST trtswith COC % v/v+ AMS lbs/ Gal. Cinch ATZ,.2 Pt/A FB Zest + Atrazine + Huskie. oz +.7 lb + fl oz Cinch ATZ,.2 Pt/A Kochiavore, Winfield Solutions 2,-D LV.67 ae lb, bromoxynil.67 lb, & Fluroxypyr.67 ae lb/gallon Broadleaf weed control including kochia. Use to. pints in corn Preplant, minimum of 7 days ahead of planting, or post plant preemergence to notill planted corn, or postemergence, v to v. Postemergence to grain and forage sorghum v to the pre-boot stage. Kochiavore will cause crop injury. Can be applied up to 2. pints on fallow. Maximum is pints/a for growing season. Do not feed or graze corn for 7 days following application or harvest grain for days of application. Do not harvest grain within 7 days of application or allow meat or dairy animals to consume fodder, forage, or graze for days following application to sorghum. Do not allow livestock to grazed fallow that has been treated with Kochiavore. 7

8 //27 Kochia control weeks after post applications, Tribune KS. Thompson, Schlegel, and Peterson. 6cornTR. Palmer amaranth control weeks after post applications, Tribune KS. Thompson, Schlegel, and Peterson. 6cornTR. 6 2 LSD=7 82 LSD= Kochiavore Kochia.+NIS+Inter. Kochiavore+AG 8 pint Kochia.+AG. pint Kochiavore Kochia.+NIS+Inter. Kochiavore+AG 8 pint Kochia.+AG. pint Questions? Curtis Robert Thompson Extension Weed Specialist K-State Cell or Of ore/pubs/srp2.pdf 8