Slide Presentation

TITLE    (click title to view slides)
Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron)

AUTHOR
Ginger K. Perdue
Long County Cooperative Extension Service

Stanley Culpepper
Extension Agronomist - Weed Science

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TABLE OF CONTENTS
  1. Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron)
  2. Purple Nutsedge Competition
  3. Trial Information
  4. Cucumber injury symptoms from Sandea applied POST.
  5. Pre-emergence Applications
  6. Non-treated vs Sandea PRE
  7. Post-emergence 2 WAE
  8. Non-treated vs Sandea 2 WAP
  9. Post-emergence 4 WAE
  10. Split Applications
  11. Non-treated vs Split
  12. Yield Results
  13. Conclusions
  14. Conclusions
  15. Conclusions
  16. Conclusions



SLIDE CONTENTS
  1. Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron). Ginger K. Perdue Long County Cooperative Extension Service A. Stanley Culpepper Extension Agronomist – Weed Science
  2. Purple Nutsedge Competition
  3. Trial Information Daytona Cucumbers planted Aug 25, 2001. 38” rows, 12” spacing. Harrowed, ripped, bedded. Plant bed prepared with Telone and ethylfluralin. Trial used a randomized complete block experimental design, replicated 4 times. Plots were two rows by 25 feet in length.
  4. Cucumber injury symptoms from Sandea applied POST.
  5. Pre-emergence Applications Application on Aug. 26, 2001. Soil moisture –fair. 11 days after app. – control of purple nutsedge 51-80%. By late-season, control dropped to 36-61%.
  7. Post-emergence 2 WAE Application on Sept. 7, 2001. Soil moisture – moist. Control of purple nutsedge 75 – 83% at 14 DAT. Late Season control held to 82 – 93%.
  9. Post-emergence 4 WAE Application on Sept. 21, 2001. Soil moisture – dry. Control of purple nutsedge 12-16% at 9 DAT. Late season control rose to 43-53%.
  10. Split Applications PRE/2WAE 2 & 4 WAE Split applications were very effective in controlling purple nutsedge at 88% by late season.
  13. Conclusions Applications of Sandea are most effective prior to 4 weeks after emergence.
  14. Conclusions Applications of Sandea are most effective prior to 4 weeks after emergence. Early season weed competition reduced yield for late application treatments.
  15. Conclusions Applications of Sandea are most effective prior to 4 weeks after emergence. Early season weed competition reduced yield for late application treatments. Greatest consistency of all measured variables seen with split applications of Sandea.
  16. Conclusions Applications of Sandea are most effective prior to 4 weeks after emergence. Early season weed competition reduced yield for late application treatments. Greatest consistency of all measured variables seen with split applications of Sandea. Premier program may be 0.5 oz PRE, followed by 0.5 oz at 3 weeks after emergence.