Evaluation of Pendimethalin CS and EC.

Transcription

1 145 Evaluation of Pendimethalin CS and EC ME70 OJECTIVE: Evaluate new formulation of pendimethalin for extended soil residual activity in fall and spring applications. SUMMRY: In no-till, fall applications of pendimethalin CS plus Roundup UltraMax and pendimethalin EC plus Roundup UltraMax controlled 52 and 75% of barnyardgrass at planting, respectively. However, due to highly variable barnyardgrass control, there was no significant difference between the two treatments. Similarly, when fall disking was used, Pendimethalin CS (57%) provided numerically less barnyardgrass control than Pendimethalin EC (87%) but this difference was not statistically significant. arnyardgrass control was 98 to 99% from 14 day early preplant applications of pendimethalin CS and EC plus Roundup UltraMax in no-till. Fall panicum control 28 days after planting in no-till was significantly greater from pendimethalin EC compared to pendimethalin CS, regardless of application timing. In general, spring applications of pendimethalin CS and pendimethalin EC provided greater weed control than fall applications. HERICIDES/TILLGES WEEDS CROP PENDIMETHLIN CS 3.8 CS PENDIMETHLIN EC 3.3 EC ROUNDUP ULTR MX 3.7 SL FLL DISC NO-TILL SPRING DISC barley, little barnyardgrass garlic, wild henbit panicum, fall ragweed, common ragweed, giant smartweed, Pennsylvania soybean ryan Young PLNT, SOIL ND GENERL GRICULTURE DEPRTMENT SOUTHERN ILLINOIS UNIVERSITY

2 146 Evaluation of Pendimethalin CS and EC. Project Code: 02-2-ME70 Location: elleville Research Center Investigator: ryan Young, ssistant Professor, Southern Illinois University City State Zip Country: elleville IL US Trial Status: Final Updated: Objective: Evaluate new formulation of pendimethalin for extended soil residual activity in fall and spring applications. Weed Code Common Name Scientific Name 1. LMM henbit Lamium amplexicaule L. 2. LLVI garlic, wild llium vineale L. 3. HORPU barley, little Hordeum pusillum Nutt. 4. ECHCG barnyardgrass Echinochloa crus-galli (L.) eauv. 5. MTR ragweed, giant mbrosia trifida L. 6. MEL ragweed, common mbrosia artemisiifolia L. 7. POLPY smartweed, Pennsylvania Polygonum pensylvanicum L. 8. PNDI panicum, fall Panicum dichotomiflorum Michx. 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: 34 FT Reps: 3 Tillage Type: See trt list Study Design: Split-plot Previous Crop, Year: ZEMX, 2001 Field Prep./Maintenance: N 0 L/, P2O5 50 L/, K2O 150 L/ Soil Name: Weir % OM: 1.5 ph: 6.4 CEC: 9 Texture: Silt loam Fert. Level: P1: 87 L/, K: 259 L/ PPLICTION DESCRIPTION pplication Date: Time of Day: 9:00 11:00 pplication Method: Spray Spray pplication Timing: FLL EPP14 pplic. Placement: ROFOL ROFOL ir Temp., Unit: 54 F 74 F % Relative Humidity: Wind Velocity, Unit: 3 MPH 3 MPH Soil Moisture: NORML ONOR CROP STGE T ECH PPLICTION Crop 1 Code, Stage: GLXM N GLXM N Height, Unit: N N N N WEED STGE T ECH PPLICTION Weed 1 Code: LMM Stage(leaves): 10+ Height(inches): 0-2 Density: Low Weed 2 Code: LLVI LLVI Stage(leaves): Height(inches): Density: Medium Low Weed 3 Code: HORPU HORPU Stage(leaves): Height(inches): Density: Low Medium

3 147 Weed 5 Code: MTR Stage(leaves): 4-5 Height(inches): 3-4 Density: Low Weed 6 Code: MEL Stage(leaves): 3-4 Height(inches): 1-3 Density: Low PPLICTION EQUIPMENT ppl. Equipment: CO2 sprayer CO2 sprayer Operating Pressure: 40 PSI 40 PSI Nozzle Type: Flat fan Flat fan Nozzle Size: oom Length, Unit: 7.5 FT 7.5 FT Spray Volume, Unit: 20 GP 20 GP NOTES: Tillages are listed in treatment list. This study was not harvested.

4 Evaluation of Pendimethalin CS and EC. Project Code: 02-2-ME70 Location: elleville Research Center Weed Code LMM LLVI HORPU HORPU ECHCG MTR MTR MEL MEL POLPY POLPY PNDI Crop Code Rating Data Type Control Control Control Control Control Control Control Control Control Control Control Control Rating Unit Percent Percent Percent Percent Percent Percent Percent Percent Percent Percent Percent Percent Rating Date Trt-Eval Interval 145 D- 145 D- 145 D- 0 DP 0 DP 0 DP 28 DP 0 DP 28 DP 0 DP 28 DP 28 DP Trt Treatment Form Form Rate Prod Prod Grow ppl No. Name Conc Type Rate Unit Rate Unit Stg Code 1 NO-TILL NO HERS FTER URN DOWN 1 ROUNDUP ULTR MX 3.7 SL 0.75 L E/ 26 OZ/ FLL 1 MS 100 DRY 2.0 % W/W 2 %W/W FLL 2 FLL DISC NONTRETED 3 SPRING DISC NONTRETED 4 NO-TILL PENDIMETHLIN CS 3.8 CS L / 3.1 PT/ FLL 4 ROUNDUP ULTR MX 3.7 SL 0.75 L E/ 26 OZ/ FLL 4 MS 100 DRY 2.0 % W/W 2 %W/W FLL 5 FLL DISC PENDIMETHLIN CS 3.8 CS L / 3.1 PT/ FLL SPRING DISC PENDIMETHLIN CS 3.8 CS L / 3.1 PT/ 14EPP 7 NO-TILL PENDIMETHLIN CS 3.8 CS L / 3.1 PT/ 14EPP 7 ROUNDUP ULTR MX 3.7 SL 0.75 L E/ 26 OZ/ 14EPP 7 MS 100 DRY 2.0 % W/W 2 %W/W 14EPP 8 NO-TILL PENDIMETHLIN EC 3.3 EC L / 3.57 PT/ FLL 8 ROUNDUP ULTR MX 3.7 SL 0.75 L E/ 26 OZ/ FLL 8 MS 100 DRY 2.0 % W/W 2 %W/W FLL 9 FLL DISC PENDIMETHLIN EC 3.3 EC L / 3.57 PT/ FLL 10 SPRING DISC PENDIMETHLIN EC 3.3 EC L / 3.57 PT/ 14EPP 11 NO-TILL PENDIMETHLIN EC 3.3 EC L / 3.57 PT/ 14EPP 11 ROUNDUP ULTR MX 3.7 SL 0.75 L E/ 26 OZ/ 14EPP 11 MS 100 DRY 2.0 % W/W 2 %W/W 14EPP LSD (P=.05)

5 Weed Code LMM LLVI HORPU HORPU ECHCG MTR MTR MEL MEL POLPY POLPY PNDI Crop Code Rating Data Type Control Control Control Control Control Control Control Control Control Control Control Control Rating Unit Percent Percent Percent Percent Percent Percent Percent Percent Percent Percent Percent Percent Rating Date Trt-Eval Interval 145 D- 145 D- 145 D- 0 DP 0 DP 0 DP 28 DP 0 DP 28 DP 0 DP 28 DP 28 DP 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 Evaluation of Pendimethalin CS and EC. Project Code: 02-2-ME70 Location: elleville Research Center Trial Comments 1. Protocol: SF. 2. D- = days after FLL application. DP = days after planting. O DP = at planting. 150