Louisiana State University Department of Agronomy and Environmental Management. Roundup Formulation and Tank Mix Test #1

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Louisiana State University Department of Agronomy and Environmental Management Experiment number...: 03SB01JGdemo Location...: James Hoppe Farm Woodlawn, LA Experimental design...: Randomized complete block Number of reps...: 2 Plot size...: 10 x 75 Row width/# per plot...: 7.5 /16 Soil type...: silt loam Planting date...: 05-30-03 Harvest date...: N/A Crop/Variety...: Soybean/ DPL 5806 Uniform std. treatment...: N/A Application type...: POST Date applied (mm/dd/yy)...: 06-23-03 Time (hh:mm-hh:mm)...: 4:00-4:30p Incorporation equipment...: N/A Incorporation depth...: N/A Air/Soil temperature (F)...: 95/90 Wind (mph, direction)...: 0-1/S Cloud cover (%)...: 40 Relative humidity (%)...: 55 Soil/Leaf surface moist...: moist/dry Crop stage/height...: V3-4/6 Sprayer type/mph...: trctrca/3.75 Nozzle type/size...: FF/11003VS Boom ht/#noz/spacing(in)...: 18 /4/20 GPA/psi...: 10/26 Applied by...: Jones Weed species (population/ft 2 ).: (height/# leaves) MEOCO...: 2-3 /2-3 ORYSA...: 6-8 /4-6 COMDI...: 4-6 /4-6 CYPIR...: 2-5 /3-5 Rainfall (in.) 0-24 hr/1-3 days...: 0.34/1.00 4-7 days/2nd week...: 0.40/0.20 3rd week/4th week...: 3.42/0.92 1

Project Code: 03SB01JGdemo This study was conducted to compare weed control with Roundup WeatherMAX and Roundup UltraMAX applied alone, and Roundup WeatherMAX applied in combination with other herbicides. Because of wet soil conditions, application was delayed and some of the weeds were 6 to 8 inches tall. Red rice was controlled 16 days after treatment at least 97% with Roundup WeatherMAX or Roundup UltraMAX regardless of rate and with Roundup WeatherMAX applied with Classic or Scepter. However, when Roundup WeatherMAX at 23.3 oz/a was applied with Storm, Basagran, or Blazer control of red rice was 80 to 85%. Excellent control of barnyardgrass and redweed was obtained with either Roundup formulation applied alone or with another herbicide. Dayflower was controlled 78 to 80% with Roundup WeatherMAX at 23.3 oz/a, Roundup UltraMAX at 25.6 oz/a, and Roundup WeatherMAX at 23.3 oz/a plus Blazer, but control was 88 to 99% for the other treatments. Rice flatsedge was controlled 90% or more for only Roundup UltraMAX at 38.4 oz/a and Roundup WeatherMAX at 23.3 oz/a plus Classic, Storm, or Basagran. Some foliar burn on soybean was observed where Storm, Basagran, or Blazer was applied with Roundup WeatherMAX. 2

ORYSA ECHCG control control 1 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 97 a 99 a 2 Roundup WeatherMAX 5.5 L 1.5 lb ai/a 35 oz/a POST 99 a 99 a 3 Roundup WeatherMAX 5.5 L 2.0 lb ai/a 46.5 oz/a POST 99 a 99 a 4 Roundup UltraMAX 5.0 L 1.0 lb ai/a 25.6 oz/a POST 99 a 99 a 5 Roundup UltraMAX 5.0 L 1.5 lb ai/a 38.4 oz/a POST 97 a 99 a 6 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 97 a 99 a 7 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 99 a 99 a 8 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 85 b 99 a 9 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 80 b 99 a 10 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 80 b 99 a LSD (P=.05) 8.1 0.0 Standard Deviation 3.6 0.0 CV 3.87 0.0 Replicate F 0.555 0.000 Replicate Prob(F) 0.4754 1.0000 Treatment F 10.164 0.000 Treatment Prob(F) 0.0010 1.0000 3

COMDI MEOCO control control 1 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 78 d 99 a 2 Roundup WeatherMAX 5.5 L 1.5 lb ai/a 35 oz/a POST 93 ab 99 a 3 Roundup WeatherMAX 5.5 L 2.0 lb ai/a 46.5 oz/a POST 93 ab 99 a 4 Roundup UltraMAX 5.0 L 1.0 lb ai/a 25.6 oz/a POST 80 cd 99 a 5 Roundup UltraMAX 5.0 L 1.5 lb ai/a 38.4 oz/a POST 88 bc 99 a 6 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 93 ab 99 a 7 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 95 ab 99 a 8 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 97 ab 99 a 9 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 99 a 99 a 10 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 80 cd 99 a LSD (P=.05) 9.6 0.0 Standard Deviation 4.2 0.0 CV 4.74 0.0 Replicate F 0.000 0.000 Replicate Prob(F) 1.0000 1.0000 Treatment F 6.542 0.000 Treatment Prob(F) 0.0050 1.0000 4

CYPIR Soybean control injury 1 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 83 de 0 c 2 Roundup WeatherMAX 5.5 L 1.5 lb ai/a 35 oz/a POST 83 de 0 c 3 Roundup WeatherMAX 5.5 L 2.0 lb ai/a 46.5 oz/a POST 88 cd 0 c 4 Roundup UltraMAX 5.0 L 1.0 lb ai/a 25.6 oz/a POST 80 e 0 c 5 Roundup UltraMAX 5.0 L 1.5 lb ai/a 38.4 oz/a POST 90 bc 0 c 6 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 95 ab 5 b 7 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 83 de 0 c 8 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 95 ab 8 b 9 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 97 a 15 a 10 Roundup WeatherMAX 5.5 L 1.0 lb ai/a 23.3 oz/a POST 88 cd 8 b LSD (P=.05) 6.4 3.4 Standard Deviation 2.8 1.5 CV 3.21 42.59 Replicate F 4.914 2.250 Replicate Prob(F) 0.0539 0.1679 Treatment F 9.231 24.000 Treatment Prob(F) 0.0014 0.0001 5

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