Louisiana State University Department of Agronomy and Environmental Management Experiment number...: 03SB03JG Location...: Ben Hur Research Farm Baton Rouge, LA Experimental design...: Randomized complete block Number of reps...: 4 Plot size...: 10 x 25 Row width/# per plot...: 15 /7 Soil type...: clay loam %OM...: 1.9 ph...: 6.3 Planting date...: 06-20-03 Harvest date...: N/A Crop/Variety...: Soybean/Asgrow AG5902 Uniform std. treatment...: N/A Application type...: POST Date applied (mm/dd/yy)...: 07-13-03 Time (hh:mm-hh:mm)...: 12:55-01:30p Incorporation equipment...: N/A Incorporation depth...: N/A Air/Soil temperature (F)...: 86/93 Wind (mph, direction)...: 5-7/WSW Cloud cover (%)...: 80 Relative humidity (%)...: 66 Soil/Leaf surface moist...: moist/dry Crop stage/height...: V4/7-10 Sprayer type/mph...: trctrca/see comments Nozzle type/size...: see comments Boom ht/#noz/spacing(in)...: 18 /4/20 GPA/psi...: 15/26 Applied by...: Etheredge Weed species (population/ft 2 ).: (height/# leaves) ECHCG (15)...: 7-12 /7-10 SEBEX (4-6)...: 2-8 /2-4 SIDSP (1)...: 1-3 /3-4 PHYLA (1)...: 2-4 /5-7 IAQTA (2)...: 2-4 /3-5 IPOLA (2)...: 5-15 /2-5 Rainfall (in.) 0-24 hr/1-3 days...: 0.00/0.00 4-7 days/2nd week...: 0.61/0.21 3rd week/4th week...: 0.03/0.05 1
Project Code: 03SB03JG Spraying Systems,, DG TeeJet, and, and Greenleaf Technologies AirMix and TurboDrop nozzles were evaluated. Roundup WeatherMAX was applied at a rate of 23.3 oz/a (1 lb ai/a) in spray volumes of 2.5, 5, and 10 gallons per acre. In analyzing the data as a factorial arrangement of treatments (spray nozzle x spray volume) there was no significant effect observed due to either factor or with the interaction of the two factors. Findings indicate that when the same rate of Roundup WeatherMAX was applied, weed control was equivalent regardless of the nozzle selection or spray volume. Furthermore, findings showed that weed control with Roundup WeatherMAX was not sacrificed when the herbicide was applied at the low spray volume of 2.5 gallons per care. Averaged across nozzles and spray volumes, barnyardgrass was controlled 96% 15 days after treatment; hemp sesbania, pitted morningglory, and prickly sida were controlled 74, 71, and 85%, respectively. By 37 days after treatment, barnyardgrass control averaged 98% and control of hemp sesbania and morningglory was at least 90%. 2
ECHCG SEBEX control control Trt Treatment Form Form Rate Other Other Growth Appl 07-28-03 07-28-03 No. Name Conc Type Rate Unit Rate Rate Unit Stage Code 15 DA-A 15 DA-A 1 10 GPA 97 a 75 a 2 10 GPA 95 b-f 75 ab 3 10 GPA 97 ab 75 a 4 10 GPA 95 def 74 ab 5 10 GPA 94 ef 75 ab 6 10 GPA 96 a-e 75 a 7 5 GPA 97 abc 75 a 8 5 GPA 96 a-d 75 a 9 5 GPA 96 a-d 75 a 10 5 GPA 96 a-e 71 b 11 5 GPA 95 def 75 a 3
ECHCG SEBEX control control Trt Treatment Form Form Rate Other Other Growth Appl 07-28-03 07-28-03 No. Name Conc Type Rate Unit Rate Rate Unit Stage Code 15 DA-A 15 DA-A 12 5 GPA 96 a-f 73 ab 13 2.5 GPA 94 ef 75 ab 14 2.5 GPA 96 a-e 75 ab 15 2.5 GPA 96 a-e 73 ab 16 2.5 GPA 94 f 75 a 17 2.5 GPA 94 f 72 ab 18 2.5 GPA 95 c-f 72 ab 19 Nontreated 0 g 0 c LSD (P=.05) 2.0 3.7 Standard Deviation 1.4 2.6 CV 1.56 3.68 Replicate F 4.577 1.301 Replicate Prob(F) 0.0063 0.2835 Treatment F 963.194 174.103 Treatment Prob(F) 0.0001 0.0001 4
IPOLA SIDSP control control Trt Treatment Form Form Rate Other Other Growth Appl 07-28-03 07-28-03 No. Name Conc Type Rate Unit Rate Rate Unit Stage Code 15 DA-A 15 DA-A 1 10 GPA 73 a 85 ab 2 10 GPA 71 a 83 c 3 10 GPA 68 a 85 ab 4 10 GPA 70 a 85 ab 5 10 GPA 73 a 85 ab 6 10 GPA 72 a 85 ab 7 5 GPA 69 a 85 ab 8 5 GPA 67 a 85 ab 9 5 GPA 71 a 85 ab 10 5 GPA 74 a 85 ab 11 5 GPA 73 a 85 ab 5
IPOLA SIDSP control control Trt Treatment Form Form Rate Other Other Growth Appl 07-28-03 07-28-03 No. Name Conc Type Rate Unit Rate Rate Unit Stage Code 15 DA-A 15 DA-A 12 5 GPA 71 a 84 bc 13 2.5 GPA 69 a 84 bc 14 2.5 GPA 69 a 83 bc 15 2.5 GPA 70 a 85 ab 16 2.5 GPA 74 a 86 a 17 2.5 GPA 68 a 84 bc 18 2.5 GPA 74 a 85 ab 19 Nontreated 0 b 0 d LSD (P=.05) 7.6 2.1 Standard Deviation 5.4 1.5 CV 8.04 1.84 Replicate F 4.600 3.053 Replicate Prob(F) 0.0061 0.0361 Treatment F 36.891 697.651 Treatment Prob(F) 0.0001 0.0001 6
Soybean ECHCG injury control Trt Treatment Form Form Rate Other Other Growth Appl 07-28-03 09-03-03 No. Name Conc Type Rate Unit Rate Rate Unit Stage Code 15 DA-A 52 DA-A 1 10 GPA 0 a 98 a 2 10 GPA 0 a 98 a 3 10 GPA 0 a 98 a 4 10 GPA 0 a 98 a 5 10 GPA 0 a 98 a 6 10 GPA 0 a 98 a 7 5 GPA 0 a 98 a 8 5 GPA 0 a 98 a 9 5 GPA 0 a 98 a 10 5 GPA 0 a 98 a 11 5 GPA 0 a 98 a 7
Soybean ECHCG injury control Trt Treatment Form Form Rate Other Other Growth Appl 07-28-03 09-03-03 No. Name Conc Type Rate Unit Rate Rate Unit Stage Code 15 DA-A 52 DA-A 12 5 GPA 0 a 98 a 13 2.5 GPA 0 a 98 a 14 2.5 GPA 0 a 98 a 15 2.5 GPA 0 a 98 a 16 2.5 GPA 0 a 98 a 17 2.5 GPA 0 a 98 a 18 2.5 GPA 0 a 98 a 19 Nontreated 0 a 0 b LSD (P=.05) 0.0 0.0 Standard Deviation 0.0 0.0 CV 0.0 0.0 Replicate F 0.000 0.000 Replicate Prob(F) 1.0000 1.0000 Treatment F 0.000 0.000 Treatment Prob(F) 1.0000 1.0000 8
SEBEX IPOSS control control Trt Treatment Form Form Rate Other Other Growth Appl 09-03-03 09-03-03 No. Name Conc Type Rate Unit Rate Rate Unit Stage Code 52 DA-A 52 DA-A 1 10 GPA 91 a 91 ab 2 10 GPA 91 a 90 ab 3 10 GPA 91 a 91 ab 4 10 GPA 95 a 88 ab 5 10 GPA 95 a 88 ab 6 10 GPA 88 a 88 ab 7 5 GPA 95 a 95 a 8 5 GPA 91 a 95 a 9 5 GPA 88 a 91 ab 10 5 GPA 95 a 83 b 11 5 GPA 91 a 95 a 9
SEBEX IPOSS control control Trt Treatment Form Form Rate Other Other Growth Appl 09-03-03 09-03-03 No. Name Conc Type Rate Unit Rate Rate Unit Stage Code 52 DA-A 52 DA-A 12 5 GPA 95 a 91 ab 13 2.5 GPA 95 a 88 ab 14 2.5 GPA 91 a 93 a 15 2.5 GPA 95 a 88 ab 16 2.5 GPA 88 a 91 ab 17 2.5 GPA 95 a 86 ab 18 2.5 GPA 95 a 91 ab 19 Nontreated 0 b 0 c LSD (P=.05) 7.7 9.6 Standard Deviation 5.5 6.8 CV 6.24 7.97 Replicate F 0.791 4.005 Replicate Prob(F) 0.5041 0.0120 Treatment F 61.220 37.813 Treatment Prob(F) 0.0001 0.0001 10
Soybean injury % Trt Treatment Form Form Rate Other Other Growth Appl 09-03-03 No. Name Conc Type Rate Unit Rate Rate Unit Stage Code 52 DA-A 1 10 GPA 0 a 2 10 GPA 0 a 3 10 GPA 0 a 4 10 GPA 0 a 5 10 GPA 0 a 6 10 GPA 0 a 7 5 GPA 0 a 8 5 GPA 0 a 9 5 GPA 0 a 10 5 GPA 0 a 11 5 GPA 0 a 11
Soybean injury % Trt Treatment Form Form Rate Other Other Growth Appl 09-03-03 No. Name Conc Type Rate Unit Rate Rate Unit Stage Code 52 DA-A 12 5 GPA 0 a 13 2.5 GPA 0 a 14 2.5 GPA 0 a 15 2.5 GPA 0 a 16 2.5 GPA 0 a 17 2.5 GPA 0 a 18 2.5 GPA 0 a 19 Nontreated 0 a LSD (P=.05) 0.0 Standard Deviation 0.0 CV 0.0 Replicate F 0.000 Replicate Prob(F) 1.0000 Treatment F 0.000 Treatment Prob(F) 1.0000 12