Comparison of "Full Load" Glyphosate Formulations in Roundup Ready Soybean - Waterhemp.

Transcription

1 76 Comparison of "Full Load" Glyphosate Formulations in Roundup Ready Soybean - Waterhemp MW60 OBJECTIVE: Compare the performance of glyphosate formulations that do not require additional surfactant (full load) in Roundup Ready soybean. SUMMRY: The primary goal of this study was to compare waterhemp control from each of the glyphosate formulations that do not require additional surfactant. Touchdown provided the greatest control of waterhemp at 14 and 28 DT (days after treatment) when the products were applied without MS. Glyphomax Plus and MON controlled 6 to 13% less waterhemp than Touchdown. However, when MS was added to each of the products waterhemp control was greatest with Glyphomax Plus and SIU 2002-H1. dding MS to Roundup UltraMax, Touchdown, and Clearout 41 Plus did not increase waterhemp control. Waterhemp control was increased by 5 to 9% when MS was added to Roundup Ultra, Glyphomax Plus, SIU 2002-H1, and MON Thus, MS had a positive effect on waterhemp control with over half of the glyphosate products tested and differences in waterhemp control between the different formulations when applied with MS were very small (0 to 5%). HERBICIDES/DJUVNTS WEEDS CROP CLEROUT 41 PLUS 3 L GLYPHOMX PLUS 3 SL MON SL ROUNDUP ULTR 3 SL ROUNDUP ULTR MX 3.7 SL SIU 2002-H SL TOUCHDOWN 3 SL MS 100 DRY foxtail, giant waterhemp, common soybean Bryan Young PLNT, SOIL ND GENERL GRICULTURE DEPRTMENT SOUTHERN ILLINOIS UNIVERSITY

2 Comparison of "Full Load" Glyphosate Formulations in Roundup Ready Soybean - Waterhemp. 77 Project Code: MW60 Location: Belleville Research Center Investigator: Bryan Young, ssistant Professor, Southern Illinois University City State Zip Country: Belleville IL US Trial Status: Final Updated: Objective: Compare the performance of glyphosate formulations that do not require additional surfactant (full load) in Roundup Ready soybean. Weed Code Common Name Scientific Name 1. SETF foxtail, giant Setaria faberi Herrm. 2. MT waterhemp, common maranthus rudis Sauer Crop 1: GLXM soybean Variety: sgrow 4602 RR Planting Method: Seeded Planting Date: Rate: 75 lb/ Depth: 1.0 IN Row Spacing: 30 IN Plot Width, Unit: 10 FT Plot Length, Unit: 25 FT Reps: 3 Tillage Type: Reduced-Till Study Design: Randomized complete block Previous Crop, Year: GLXM, 2001 Field Prep./Maintenance: N 0 LB/, P2O5 50 LB/, K2O 150 LB/ Soil Name: Weir % OM: 1.9 ph: 7.1 CEC: 12 Texture: Silt loam Fert. Level: P1: 97 LB/, K: 282 LB/ PPLICTION DESCRIPTION pplication Date: Time of Day: 9:30 pplication Method: Spray pplication Timing: 6"W pplic. Placement: BROFOL ir Temp., Unit: 80 F % Relative Humidity: 60 Wind Velocity, Unit: 0-3 MPH Dew Presence (Y/N): N Soil Moisture: BELNOR % Cloud Cover: 15 CROP STGE T ECH PPLICTION Crop 1 Code, Stage: GLXM V3 Height, Unit: 8-10 IN WEED STGE T ECH PPLICTION Weed 1 Code: SETF Stage(leaves): 5-7 Height(inches): 7-10 Density: High Weed 2 Code: MT Stage(leaves): 6-8 Height(inches): 4-8 Density: High

3 78 PPLICTION EQUIPMENT ppl. Equipment: CO2 sprayer Operating Pressure: 40 PSI Nozzle Type: Flat fan Nozzle Size: DG Boom Length, Unit: 7.5 FT Spray Volume, Unit: 10 GP NOTES: This study was not harvested.

4 Comparison of "Full Load" Glyphosate Formulations in Roundup Ready Soybean - Waterhemp. Project Code: MW60 Location: Belleville Research Center Weed Code SETF SETF MT MT Crop Code GLXM Rating Data Type Injury Control Control Control Control Rating Unit Percent Percent Percent Percent Percent Rating Date Trt-Eval Interval 14 D- 14 D- 28 D- 14 D- 28 D- Trt Treatment Form Form Rate Prod Prod Grow ppl No. Name Conc Type Rate Unit Rate Unit Stg Code 1 NONTRETED ROUNDUP ULTR MX 3.7 SL LB E/ 6.5 OZ/ 6"W ROUNDUP ULTR 3 SL LB E/ 8 OZ/ 6"W GLYPHOMX PLUS 3 SL LB E/ 8 OZ/ 6"W TOUCHDOWN 3 SL LB E/ 8 OZ/ 6"W SIU 2002-H SL LB E/ 5.77 OZ/ 6"W MON SL LB E/ 5.35 OZ/ 6"W CLEROUT 41 PLUS 3 L LB E/ 8 OZ/ 6"W ROUNDUP ULTR MX 3.7 SL LB E/ 6.5 OZ/ 6"W MS 100 DRY 2.0 % W/W 2 % W/W 6"W 10 ROUNDUP ULTR 3 SL LB E/ 8 OZ/ 6"W MS 100 DRY 2.0 % W/W 2 % W/W 6"W 11 GLYPHOMX PLUS 3 SL LB E/ 8 OZ/ 6"W MS 100 DRY 2.0 % W/W 2 % W/W 6"W 12 TOUCHDOWN 3 SL LB E/ 8 OZ/ 6"W MS 100 DRY 2.0 % W/W 2 % W/W 6"W 13 SIU 2002-H SL LB E/ 5.77 OZ/ 6"W MS 100 DRY 2.0 % W/W 2 %W/W 6"W 14 MON SL LB E/ 5.35 OZ/ 6"W MS 100 DRY 2.0 % W/W 2 %W/W 6"W 15 CLEROUT 41 PLUS 3 L LB E/ 8 OZ/ 6"W MS 100 DRY 2.0 % W/W 2 %W/W 6"W 16 ROUNDUP ULTR MX 3.7 SL 0.75 LB E/ 26 OZ/ 6"W LSD (P=.05)

5 Weed Code SETF SETF MT MT Crop Code GLXM Rating Data Type Injury Control Control Control Control Rating Unit Percent Percent Percent Percent Percent Rating Date Trt-Eval Interval 14 D- 14 D- 28 D- 14 D- 28 D- Trt Treatment Form Form Rate Prod Prod Grow ppl No. Name Conc Type Rate Unit Rate Unit Stg Code Replicate F Replicate Prob(F) Treatment F Treatment Prob(F)

6 Comparison of "Full Load" Glyphosate Formulations in Roundup Ready Soybean - Waterhemp. Project Code: MW60 Location: Belleville Research Center Trial Comments 1. Protocol: SIU (BGY). 2. D- = days after 6"W application. 81