(01-ASC-1) Evaluation of FirstRate, Pendimax, Python and Glyphomax Plus for weed control in soybean, Ames, Iowa, 2001. Owen, Micheal D.K., James F. Lux, and Damian D. Franzenburg. The purpose of this study was to evaluate chloransulam and glyphosate for weed efficacy and crop phytotoxicity in a glyphosate resistant soybean variety. The soil was a Canisteo, Nicollet, Clarion Webster clay loam with a ph 6.8 and 4.3% organic matter. The experimental design was a randomized complete block with three replications and plots were 10 by 25 ft. The 2000 crop was corn. Preplant treatments were incorporated one pass with a field cultivator operating 2 to 3 inches deep. Crop residue on the soil surface was 12% at planting. Asgrow variety AG 2401 RR soybeans were planted 1.25 inches deep on June 8, at 154,000 seeds/a in 30-inch rows. May rainfall included: 0.18, 0.39, 0.83, 0.12, 0.15, 0.22, 0.07, 0.98, 0.26, 1.58, 0.05, 0.15, 0.03, 0.27, 0.20, 0.02, 0.13 and 0.64 inches on May 1, 2, 3, 4, 5, 6, 9, 10, 13, 20, 21, 23, 24, 25, 26, 27, 28 and 31, respectively. Total rainfall for May was 6.27 inches. June rainfall included: 0.07, 0.02, 0.30, 0.14, 0.59, 0.38, 0.16 and 0.01 inches on June 1, 4, 5, 10, 12, 14, 16 and 20, respectively. Total rainfall for June was 1.67 inches. July rainfall included: 0.44 inches and 1.24 inches from July 1 through 15 and 16 through 31, respectively. Rainfall total for August was 2.50 inches. Application information is listed below: Date June 8 June 9 July 3 July 9 Treatment PPI PRE EPOST POST Sprayer gpa 20 20 20 20 psi 30 30 30 30 nozzle 11002 11002 11002 11002 Temperature (C) air 27 28 31 31 soil (4 inch) 25 21 35 30 Soil moisture moist dry dry dry Wind (mph) 4-6 N 0-7 W 0-3 W 3-5 N Sky pt. cloudy clear pt. cloudy clear Relative humidity (%) 59% 56% 78% 72% Soybean growth leaf no. - - V3 V3-5 height (inch) - - 4-5 4-6 Giant foxtail leaf no. - - 3-5 3-5 height (inch) - - 2-5 4-6 infestation (ft 2 ) - - 0-2 0-20 Common cocklebur leaf no. - - 4-10 6 height (inch) - - 4-6 6-10 infestation (ft 2 ) - - 0-2 0-2 Common lambsquarters leaf no. - - numerous - height (inch) - - 3-4 - infestation (ft 2 ) - - 0-1 - Common ragweed leaf no. - - - numerous height (inch) - - - 4-10 infestation (ft 2 ) - - - 0-3
Common waterhemp leaf no. - - numerous numerous height (inch) - - 2-6 4-6 infestation (ft 2 ) - - 0-15 0-5 Velvetleaf leaf no. - - numerous numerous height (inch) - - 2-3 3-4 infestation (ft 2 ) - - 0-1 0-1 Venice mallow leaf no. - - numerous numerous height (inch) - - 2-4 4 infestation (ft 2 ) - - 0-1 0-5 PPI and PRE treatments did not cause significant nor consistent soybean injury, as observed on July 10 and 17. EPOST treatments containing Firstrate plus either Flexstar or Cobra caused significant soybean injury on July 10. POST and EPOST Firstrate treatments without Flexstar or Cobra did not cause significant injury. On July 17, PRE Firstrate plus Python provided only 50% control of common waterhemp. PPI Python plus Pendimax, Treflan MTF and Pendimax provided 83, 78 and 83 % control of common ragweed. Common lambsquarters control was 77 and 47% for EPOST Firstrate plus Flexstar and Firstrate plus Cobra, respectively. Common cocklebur control was fair for PPI treatments with Firstrate plus Treflan MTF or Pendimax and Python plus Pendimax. On August 17, EPOST Firstrate plus Flexstar plus Select, PPI Python plus Pendimax plus EPOST Firstrate plus Select, POST Firstrate plus Glyphomax Plus at 1.0 lb/a and treatments with only soil applications did not provide adequate common waterhemp control. Trends observed on July 17 for common ragweed and common lambsquarters control were observed again on August 17. (Dept. of Agronomy, Iowa State University, Ames)
CREATED: 06/05/2001 REVISED: 12/13/2001 COMPLETED: N PROJECT TYPE: HERBICIDE LOCATION: AMES, IA RESEARCHED BY: IA State University DESIGN: RANDOMIZED COMPLETE BLOCK DESIGN PLOT SIZE: 10.00 FT WIDE X 25.00 FT LONG REPS: 03 GLXMA GLXMA SETFA ABUTH AMATA TRT TREATMENT DOSAGE PHY % PHY % CON % CON % CON % NUM COMPONENT RATE UNIT TM 07/10/01 07/17/01 07/17/01 07/17/01 07/17/01 1A UNTREATED CHECK 0.00 NA 0 0 0 0 0 0 2A»FIRSTRATE (84WG) 0.032 LAA 1 2 2 96 99 93 B TREFLAN MTF (4EC) 1.00 LAA 1 3A»FIRSTRATE (84WG) 0.032 LAA 1 3 2 98 98 90 4A»PYTHON (80WDG) 0.05 LAA 1 7 3 93 98 93 5A»FIRSTRATE (84WG) 0.0263 LAA 2 3 2 92 99 50 6A»FIRSTRATE (84WG) 0.016 LAA 3 25 18 92 99 96 B»FLEXSTAR (1.88SL) 0.176 LAA 3 7A»FIRSTRATE (84WG) 0.016 LAA 3 27 17 92 99 99 B COBRA (2EC) 0.125 LAA 3 8A»PENDIMAX (3.3EC) 1.24 LAA 1 17 8 96 99 99 B»FIRSTRATE (84WG) 0.016 LAA 3 C»FLEXSTAR (1.88SL) 0.176 LAA 3 9A»PYTHON (80WDG) 0.05 LAA 1 12 7 99 99 90 C»FIRSTRATE (84WG) 0.016 LAA 3 D SELECT (2EC) 0.094 LAA 3 E»28%N 2.50 PMV 3 F»NIS 0.125 PMV 3 10A TREFLAN MTF (4EC) 1.00 LAA 1 0 0 99 99 96 11A»PENDIMAX (3.3EC) 1.24 LAA 1 10 10 99 95 93 12A»PYTHON (80WDG) 0.04 LAA 1 0 0 99 99 99 13A»FIRSTRATE (84WG) 0.032 LAA 2 2 2 99 99 88 14A»FIRSTRATE (84WG) 0.0263 LAA 2 0 0 98 99 92 15A»PENDIMAX (3.3EC) 1.24 LAA 1 8 8 99 99 94 B»FIRSTRATE (84WG) 0.016 LAA 4 D»NIS 0.25 PMV 4 E»AMMONIUM SULFATE 2.50 LMA 4
GLXMA GLXMA SETFA ABUTH AMATA TRT TREATMENT DOSAGE PHY % PHY % CON % CON % CON % NUM COMPONENT RATE UNIT TM 07/10/01 07/17/01 07/17/01 07/17/01 07/17/01 16A»FIRSTRATE (84WG) 0.016 LAA 4 0 5 99 99 82 17A»FIRSTRATE (84WG) 0.016 LAA 4 0 3 99 99 67 B»GLYPHOMAX PLUS (4SL) 1.00 LAA 4 18A»GLYPHOMAX PLUS (4SL) 1.00 LAA 4 0 0 99 98 91 B»AMMONIUM SULFATE 2.50 LMA 4 LSD (0.05) 4.30 5.00 4.00 2.28 9.76
CREATED: 06/05/2001 REVISED: 12/13/2001 COMPLETED: N PROJECT TYPE: HERBICIDE LOCATION: AMES, IA RESEARCHED BY: IA State University DESIGN: RANDOMIZED COMPLETE BLOCK DESIGN PLOT SIZE: 10.00 FT WIDE X 25.00 FT LONG REPS: 03 AMBEL CHEAL HIBTR XANST GLXMA TRT TREATMENT DOSAGE CON % CON % CON % CON % PHY % NUM COMPONENT RATE UNIT TM 07/17/01 07/17/01 07/17/01 07/17/01 08/17/01 1A UNTREATED CHECK 0.00 NA 0 0 0 0 0 0 2A»FIRSTRATE (84WG) 0.032 LAA 1 99 99 96 85 0 B TREFLAN MTF (4EC) 1.00 LAA 1 3A»FIRSTRATE (84WG) 0.032 LAA 1 99 99 95 82 0 4A»PYTHON (80WDG) 0.05 LAA 1 83 99 96 80 0 5A»FIRSTRATE (84WG) 0.0263 LAA 2 96 99 99 90 0 6A»FIRSTRATE (84WG) 0.016 LAA 3 99 77 99 99 13 B»FLEXSTAR (1.88SL) 0.176 LAA 3 7A»FIRSTRATE (84WG) 0.016 LAA 3 99 47 99 99 7 B COBRA (2EC) 0.125 LAA 3 8A»PENDIMAX (3.3EC) 1.24 LAA 1 99 94 99 99 0 B»FIRSTRATE (84WG) 0.016 LAA 3 C»FLEXSTAR (1.88SL) 0.176 LAA 3 9A»PYTHON (80WDG) 0.05 LAA 1 99 99 99 99 2 C»FIRSTRATE (84WG) 0.016 LAA 3 D SELECT (2EC) 0.094 LAA 3 E»28%N 2.50 PMV 3 F»NIS 0.125 PMV 3 10A TREFLAN MTF (4EC) 1.00 LAA 1 78 99 88 99 0 11A»PENDIMAX (3.3EC) 1.24 LAA 1 83 99 94 99 10 12A»PYTHON (80WDG) 0.04 LAA 1 98 99 99 99 0 13A»FIRSTRATE (84WG) 0.032 LAA 2 99 99 99 99 2 14A»FIRSTRATE (84WG) 0.0263 LAA 2 99 99 99 99 0 15A»PENDIMAX (3.3EC) 1.24 LAA 1 93 99 99 99 7 B»FIRSTRATE (84WG) 0.016 LAA 4 D»NIS 0.25 PMV 4 E»AMMONIUM SULFATE 2.50 LMA 4
AMBEL CHEAL HIBTR XANST GLXMA TRT TREATMENT DOSAGE CON % CON % CON % CON % PHY % NUM COMPONENT RATE UNIT TM 07/17/01 07/17/01 07/17/01 07/17/01 08/17/01 16A»FIRSTRATE (84WG) 0.016 LAA 4 83 99 88 99 2 17A»FIRSTRATE (84WG) 0.016 LAA 4 96 99 95 98 3 B»GLYPHOMAX PLUS (4SL) 1.00 LAA 4 18A»GLYPHOMAX PLUS (4SL) 1.00 LAA 4 95 99 93 99 0 B»AMMONIUM SULFATE 2.50 LMA 4 LSD (0.05) 8.00 6.88 5.56 8.85 4.14
CREATED: 06/05/2001 REVISED: 12/13/2001 COMPLETED: N PROJECT TYPE: HERBICIDE LOCATION: AMES, IA RESEARCHED BY: IA State University DESIGN: RANDOMIZED COMPLETE BLOCK DESIGN PLOT SIZE: 10.00 FT WIDE X 25.00 FT LONG REPS: 03 SETFA ABUTH AMATA AMBEL CHEAL TRT TREATMENT DOSAGE CON % CON % CON % CON % CON % NUM COMPONENT RATE UNIT TM 08/17/01 08/17/01 08/17/01 08/17/01 08/17/01 1A UNTREATED CHECK 0.00 NA 0 0 0 0 0 0 2A»FIRSTRATE (84WG) 0.032 LAA 1 90 99 75 96 99 B TREFLAN MTF (4EC) 1.00 LAA 1 3A»FIRSTRATE (84WG) 0.032 LAA 1 92 96 75 99 98 4A»PYTHON (80WDG) 0.05 LAA 1 92 94 77 78 99 5A»FIRSTRATE (84WG) 0.0263 LAA 2 82 96 33 94 99 6A»FIRSTRATE (84WG) 0.016 LAA 3 92 99 72 99 62 B»FLEXSTAR (1.88SL) 0.176 LAA 3 7A»FIRSTRATE (84WG) 0.016 LAA 3 88 99 96 99 37 B COBRA (2EC) 0.125 LAA 3 8A»PENDIMAX (3.3EC) 1.24 LAA 1 92 99 99 99 94 B»FIRSTRATE (84WG) 0.016 LAA 3 C»FLEXSTAR (1.88SL) 0.176 LAA 3 9A»PYTHON (80WDG) 0.05 LAA 1 99 99 77 99 99 C»FIRSTRATE (84WG) 0.016 LAA 3 D SELECT (2EC) 0.094 LAA 3 E»28%N 2.50 PMV 3 F»NIS 0.125 PMV 3 10A TREFLAN MTF (4EC) 1.00 LAA 1 99 99 93 85 99 11A»PENDIMAX (3.3EC) 1.24 LAA 1 99 90 90 82 99 12A»PYTHON (80WDG) 0.04 LAA 1 99 99 99 96 99 13A»FIRSTRATE (84WG) 0.032 LAA 2 98 98 88 99 99 14A»FIRSTRATE (84WG) 0.0263 LAA 2 98 99 90 99 98 15A»PENDIMAX (3.3EC) 1.24 LAA 1 99 99 92 96 99 B»FIRSTRATE (84WG) 0.016 LAA 4 D»NIS 0.25 PMV 4 E»AMMONIUM SULFATE 2.50 LMA 4
SETFA ABUTH AMATA AMBEL CHEAL TRT TREATMENT DOSAGE CON % CON % CON % CON % CON % NUM COMPONENT RATE UNIT TM 08/17/01 08/17/01 08/17/01 08/17/01 08/17/01 16A»FIRSTRATE (84WG) 0.016 LAA 4 99 99 82 92 99 17A»FIRSTRATE (84WG) 0.016 LAA 4 99 99 68 98 99 B»GLYPHOMAX PLUS (4SL) 1.00 LAA 4 18A»GLYPHOMAX PLUS (4SL) 1.00 LAA 4 98 96 85 95 99 B»AMMONIUM SULFATE 2.50 LMA 4 LSD (0.05) 6.50 6.67 13.48 7.12 9.91
CREATED: 06/05/2001 REVISED: 12/13/2001 COMPLETED: N PROJECT TYPE: HERBICIDE LOCATION: AMES, IA RESEARCHED BY: IA State University DESIGN: RANDOMIZED COMPLETE BLOCK DESIGN PLOT SIZE: 10.00 FT WIDE X 25.00 FT LONG REPS: 03 HIBTR XANST TRT TREATMENT DOSAGE CON % CON % NUM COMPONENT RATE UNIT TM 08/17/01 08/17/01 1A UNTREATED CHECK 0.00 NA 0 0 0 2A»FIRSTRATE (84WG) 0.032 LAA 1 96 80 B TREFLAN MTF (4EC) 1.00 LAA 1 3A»FIRSTRATE (84WG) 0.032 LAA 1 95 73 4A»PYTHON (80WDG) 0.05 LAA 1 96 70 5A»FIRSTRATE (84WG) 0.0263 LAA 2 99 83 6A»FIRSTRATE (84WG) 0.016 LAA 3 99 99 B»FLEXSTAR (1.88SL) 0.176 LAA 3 7A»FIRSTRATE (84WG) 0.016 LAA 3 99 99 B COBRA (2EC) 0.125 LAA 3 8A»PENDIMAX (3.3EC) 1.24 LAA 1 99 99 B»FIRSTRATE (84WG) 0.016 LAA 3 C»FLEXSTAR (1.88SL) 0.176 LAA 3 9A»PYTHON (80WDG) 0.05 LAA 1 99 99 C»FIRSTRATE (84WG) 0.016 LAA 3 D SELECT (2EC) 0.094 LAA 3 E»28%N 2.50 PMV 3 F»NIS 0.125 PMV 3 10A TREFLAN MTF (4EC) 1.00 LAA 1 93 99 11A»PENDIMAX (3.3EC) 1.24 LAA 1 95 99 12A»PYTHON (80WDG) 0.04 LAA 1 99 99 13A»FIRSTRATE (84WG) 0.032 LAA 2 99 99 14A»FIRSTRATE (84WG) 0.0263 LAA 2 98 99 15A»PENDIMAX (3.3EC) 1.24 LAA 1 99 99 B»FIRSTRATE (84WG) 0.016 LAA 4 D»NIS 0.25 PMV 4 E»AMMONIUM SULFATE 2.50 LMA 4
HIBTR XANST TRT TREATMENT DOSAGE CON % CON % NUM COMPONENT RATE UNIT TM 08/17/01 08/17/01 16A»FIRSTRATE (84WG) 0.016 LAA 4 92 99 17A»FIRSTRATE (84WG) 0.016 LAA 4 96 98 B»GLYPHOMAX PLUS (4SL) 1.00 LAA 4 18A»GLYPHOMAX PLUS (4SL) 1.00 LAA 4 95 99 B»AMMONIUM SULFATE 2.50 LMA 4 LSD (0.05) 3.73 11.84» = SUPPLEMENTAL CHEMICAL * TIMING CODES 00 = UNTRCHK / UNTREATED TIMING (FP) 01 = PRE_INC / PPI 06/08/2001(1) 02 = PREPRE / PRE 06/09/2001(2) 03 = EAPOWE / EPOST 07/03/2001(3) 04 = POSPOS / POST 07/09/2001(4)