Herbicides and Weed Control Jim Heiser 11-19-2018
Issues to be addressed Weed Control in Row Rice 2017 and 2018 results Different treatment lists Dicamba effects on rice growth and grain quality applied at various growth stages Auxins in Soybean, Cotton, and Rice in 2019
Weed Control in Row Rice Two distinct treatment lists Availability of Loyant Challenges in 2017 Salvaged crown-end treatments 2018-only planned on crown-end treatments Evaluations Weed control ratings - palmer, pitted morningglory, horsenettle, yellow nutsedge, broadleaf signalgrass, purple ammannia Crop response stunting, chlorosis, general injury
Weed Control in Row Rice - 2017 Command + Sharpen PRE all treatments Rep 1, Treatment 2 had poor control of Palmer all season Very good control of other species Rep 2 had very good Palmer control
Weed Control in Row Rice - 2017 Yields not great Similar for both reps PRE fb Ricebeaux + Facet MPOST best treatment PRE fb EPOST and PRE fb EPOST fb MPOST similar to untreated Too early? Too Much?
Weed Control in Row Rice - 2017 What's next More diverse treatment list Inclusion of new products Loyant, RiceOne, Gambit Haven t had enough product Removal of poor performance treatments Less than 90% control not acceptable
Weed Control in Row Rice - 2018 New treatment list Treatment # 1 2 3 4 5 6 Herbicide Rate Timing Treatment # Herbicide Rate Timing Command 3ME 13 fl.oz./ac. PRE Command 3ME 13 fl.oz./ac. PRE Stam M4 3 qt./ac. EPOST Stam M4 3 qt./ac. EPOST 7 Facet L 43 fl.oz./ac EPOST Facet L 32 fl.oz/ac. EPOST Stam M4 3 qt./ac. MPOST Prowl H2O 32 fl.oz/ac. EPOST Prowl H2O 32 fl.oz/ac. MPOST Command 3ME 13 fl.oz./ac. PRE Command 3ME 13 fl.oz./ac. PRE Stam M4 3 qt./ac. EPOST Sharpen 3 fl.oz./ac PRE 8 Facet L 32 fl.oz/ac. EPOST Ricebeaux 3 qt./ac. MPOST Prowl H2O 32 fl.oz/ac. EPOST Facet L 32 fl.oz/ac. MPOST Sharpen 1 fl.oz./ac MPOST Command 3ME 13 fl.oz./ac. PRE Command 3ME 13 fl.oz./ac. PRE Sharpen 3 fl.oz./ac PRE Stam M4 3 qt./ac. EPOST Loyant 16 fl.oz./ac MPOST Facet L 32 fl.oz/ac. EPOST 9 Command 3ME 13 fl.oz./ac. PRE Prowl H2O 32 fl.oz/ac. EPOST Sharpen 2 fl.oz./ac PRE Sharpen 1 fl.oz./ac MPOST Loyant 16 fl.oz./ac MPOST Sharpen 1 fl.oz./ac LPOST Command 3ME 13 fl.oz./ac. PRE Command 3ME 13 fl.oz./ac. PRE Sharpen 3 fl.oz./ac PRE Loyant 16 fl.oz./ac EPOST 10 Loyant 16 fl.oz./ac EPOST Grasp SC 2 fl.oz./ac EPOST Loyant 16 fl.oz./ac MPOST Loyant 16 fl.oz./ac LPOST Command 3ME 13 fl.oz./ac. PRE Command 3ME 13 fl.oz./ac. PRE Sharpen 2 fl.oz./ac PRE 11 Grasp Xtra 18 fl.oz./ac/ EPOST Loyant 16 fl.oz./ac EPOST Grandstand R 16 fl.oz./ac LPOST Loyant 16 fl.oz./ac MPOST 12 Command 3ME 13 fl.oz./ac. PRE PRE EPOST MPOST LPOST
Weed Control in Row Rice-2018 Variability in Palmer control 7 days after EPOST treatments 84 to 96% control Similar just prior to MPOST timing (23 DAT) >80% control in all plots with treatment averages greater than 89% for all treatments (10 DAT) Control improved for the remainder of evaluations 18, 30, 44 DAT MPOST >95% control Some treatments included a LPOST application
Weed Control in Row Rice - 2018 June 29 August 14
Weed Control in Row Rice - 2018 6-29-18 Treatment 12 Command PRE 7-9-18 6-29-18 Treatment 7 Stam + Facet + Prowl EPOST 7-9-18 6-29-18 Treatment 10 Loyant + Grasp EPOST Loyant LPOST 7-9-18
Weed Control in Row Rice - 2018 Control of Signalgrass, morningglory, nutsedge and ammannia good to great Until August Bare spots Between plots Invading into plots
Weed Control in Row Rice - 2018 June 29 August 14
Weed Control in Row Rice - 2018 Treatment average yields ranged from 128.3 bu/ac to 157.0 bu/ac Individual plot yield range: 100.3 184.6 bu/ac Treatment 8 lowest variability (132.7, 142.1, 130.9) Treatment 1 highest variability (132.7, 128.4, 184.6)
Dicamba effects on rice Application of Engenia at 12.8, 6.4 and 1.28 fl.oz./ac Applied with 15 gpa carrier Applied at planting, 3-4 leaf rice, Post-flood, PI, PI+14 days, Boot, flowering Hybrid and Conventional rice
Dicamba effects on rice Evaluated visual injury 14 DAT Nothing noted up to boot stage Drooping flag leaf and upright panicles Hybrid vs. Conventional
Dicamba effects on rice Later applications resulted in generally lower yields Boot and Flowering both show trend clearly Poor yields overall including checks Empty hulls attached to panicles following threshing
Dicamba effects on rice Yield Conventional
Dicamba effects on rice Yield Hybrid
Dicamba effects on rice - Milled Milled only samples from plots with visual injury
Dicamba effects on rice - Milled
Dicamba effects on rice - Milled
Dicamba effects on rice - Polish
Dicamba effects on rice Polish Hybrid
Dicamba effects on rice - Germination Some differences but a lot of noise Conventional germination higher than corresponding hybrid for all timings and dicamba rates
Dicamba effects on rice - Germination Some differences but a lot of noise Conventional germination higher than corresponding hybrid for all timings and dicamba rates
Dicamba effects on rice - Germination Some differences but a lot of noise Conventional germination higher than corresponding hybrid for all timings and dicamba rates
Dicamba effects on rice - Germination Yield vs. post harvest germination tests 801 21 802 22 803 3 804 4 805 15 806 16 807 9 808 10 809 19 810 20 811 29 812 30 813 39 814 40 815 23 816 24 817 35 818 36 819 41 820 42 821 27 822 28 701 33 702 34 703 31 704 32 705 11 706 12 707 25 708 26 709 37 710 38 711 17 712 18 713 43 714 44 715 7 716 8 717 1 718 2 719 13 720 14 721 5 722 6 601 35 602 36 603 37 604 38 605 29 606 30 607 41 608 42 609 27 610 28 611 23 612 24 613 31 614 32 615 25 616 26 617 39 618 40 619 33 620 34 621 43 622 44 501 13 502 14 503 7 504 8 505 19 506 20 507 1 508 2 509 15 510 16 511 5 512 6 513 9 514 10 515 3 516 4 517 17 518 18 519 11 520 12 521 21 522 22 401 43 402 44 403 41 404 42 405 39 406 40 407 37 408 38 409 35 410 36 411 33 412 34 413 31 414 32 415 29 416 30 417 27 418 28 419 25 420 26 421 23 422 24 301 21 302 22 303 19 304 20 305 17 306 18 307 15 308 16 309 13 310 14 311 11 312 12 313 9 314 10 315 7 316 8 317 5 318 6 319 3 320 4 321 1 322 2 201 23 202 24 203 25 204 26 205 27 206 28 207 29 208 30 209 31 210 32 211 33 212 34 213 35 214 36 215 37 216 38 217 39 218 40 219 41 220 42 221 43 222 44 101 1 102 2 103 3 104 4 105 5 106 6 107 7 108 8 109 9 110 10 111 11 112 12 113 13 114 14 115 15 116 16 117 17 118 18 119 19 120 20 121 21 122 22 Yield 801 21 802 22 803 3 804 4 805 15 806 16 807 9 808 10 809 19 810 20 811 29 812 30 813 39 814 40 815 23 816 24 817 35 818 36 819 41 820 42 821 27 822 28 701 33 702 34 703 31 704 32 705 11 706 12 707 25 708 26 709 37 710 38 711 17 712 18 713 43 714 44 715 7 716 8 717 1 718 2 719 13 720 14 721 5 722 6 601 35 602 36 603 37 604 38 605 29 606 30 607 41 608 42 609 27 610 28 611 23 612 24 613 31 614 32 615 25 616 26 617 39 618 40 619 33 620 34 621 43 622 44 501 13 502 14 503 7 504 8 505 19 506 20 507 1 508 2 509 15 510 16 511 5 512 6 513 9 514 10 515 3 516 4 517 17 518 18 519 11 520 12 521 21 522 22 401 43 402 44 403 41 404 42 405 39 406 40 407 37 408 38 409 35 410 36 411 33 412 34 413 31 414 32 415 29 416 30 417 27 418 28 419 25 420 26 421 23 422 24 301 21 302 22 303 19 304 20 305 17 306 18 307 15 308 16 309 13 310 14 311 11 312 12 313 9 314 10 315 7 316 8 317 5 318 6 319 3 320 4 321 1 322 2 201 23 202 24 203 25 204 26 205 27 206 28 207 29 208 30 209 31 210 32 211 33 212 34 213 35 214 36 215 37 216 38 217 39 218 40 219 41 220 42 221 43 222 44 101 1 102 2 103 3 104 4 105 5 106 6 107 7 108 8 109 9 110 10 111 11 112 12 113 13 114 14 115 15 116 16 117 17 118 18 119 19 120 20 121 21 122 22 82.000 to 86.500 86.500 to 91.000 91.000 to 95.500 95.500 to 100.000 55.000 to 59.500 59.500 to 64.000 64.000 to 68.500 68.500 to 73.000 73.000 to 77.500 77.500 to 82.000 Germination 196.2 to 224.3 252.4 to 280.5 280.5 to 308.7 27.5 to 55.6 55.6 to 83.7 83.7 to 111.8 111.8 to 139.9 139.9 to 168.1 168.1 to 196.2
What is Loyant supposed to do Broad Spectrum control or suppression Grasses Signalgrass, barnyard, panicum Suppression of sprangletops No crabgrass activity Sedges Yes (even ALS resistant biotypes) Aquatics Great on what we commonly have Broadleaves Fair on smartweed, excellent on others
How do we utilize it? While very broad spectrum Utilize Clincher or Ricestar for resistance management Better sprangletop control EPOST needs a residual Resistance management Delays in flood establishment Untreated Loyant 10 DAT Londax 10 DAT
Loyant issues - 2018 Poor performance on grasses Drift to cotton and soybeans Injury to rice Other issues Discussion Photo:Texas Agrilife
Loyant issues - 2018 Poor performance on grasses Very dry at application Little to no growth occurring No control
Loyant issues - 2018
Loyant issues - 2018
Loyant issues - 2018
Loyant issues - 2018 Injury to rice Stunting Photo: Univ. of Arkansas Buggy whipping and onion leafing Photo: Univ. of Arkansas Bunched Leaves in stem Photo: Univ. of Arkansas Appear ~ 3 wks after application Thin stand soil or environmental stress Facet tank mixes Doubled up areas Hybrids>medium grain>long grain Remove/reduce flood if severe
Loyant Issues - 2018 What did you see? Lets talk it out
Auxin update for 2019 Only Certified applicators may apply Cannot work under the umbrella of a certified applicator Private or Commercial? Cutoff date based on planting date Burndown - mid-august Dicamba Rules
Auxin update for 2019 Cotton OTT reduced from 4 to 2 Soybeans 2 OTT Apply from Sunrise+1 hr. to sunset-2hrs. Endangered species county restrictions 110 downwind 57 all other field sides
Auxin update for 2019 Determine training period for 2019 -???? Ensure consistent program for all labeled products Improved cleanout instructions Impact of low ph on potential volatility Registration expires 12/20/2020 New label available 12/20/18????
Auxin update for 2019 Will states require more than federal label? Probably, but not sure what Are we following the rules Or just not getting caught Non-ag community taking notice Will it matter? Enough inspectors/investigators available/trained?
Jim Heiser Weed Science Project MU Fisher Delta Research Center 147 W State Hwy T PO Box 160 Portageville, MO 63873 O: (573) 379-5431 C: (573) 999-3748 heiserj@missouri.edu twitter: @MUfdrcweeds