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Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron). Ginger K. Perdue Long County Cooperative Extension Service A. Stanley Culpepper Extension Agronomist – Weed Science
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Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

Jan 01, 2016

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Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron). Ginger K. Perdue Long County Cooperative Extension Service A. Stanley Culpepper Extension Agronomist – Weed Science. Purple Nutsedge Competition. Trial Information. Daytona Cucumbers planted Aug 25, 2001. - PowerPoint PPT Presentation
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Page 1: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

Purple Nutsedge Control and Cucumber Tolerance to Sandea

(Halosulfuron).

Ginger K. Perdue Long County Cooperative Extension Service

A. Stanley Culpepper Extension Agronomist – Weed Science

Page 2: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

Purple Nutsedge Competition

Page 3: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

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.

Page 4: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

Cucumber injury symptoms from Sandea applied POST.

Page 5: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

05

101520253035404550

0.5 oz 0.75 oz 1.0 oz

plants/plot# fruitlb/plot

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%.

Page 6: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).
Page 7: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

05

101520253035404550

0.5 oz 0.75 oz 1.0 oz

plants/plot# fruitlb/plot

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%.

Page 8: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).
Page 9: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

05

101520253035404550

0.5 oz 0.75 oz 1.0 oz

plants/plot# fruitlb/plot

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%.

Page 10: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

05

101520253035404550

0.5 oz 0.5 oz none

plants/plot# fruitlb/plot

Split Applications

PRE/2WAE 2 & 4 WAE

Split applications were very effective in controlling purple nutsedge at 88% by late season.

Page 11: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

Non-treated control Sandea (0.5 oz/A) PRE

Sandea (0.5 oz/A) 2 WAP

Page 12: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

Yield in pounds

11.2

8.510.2

11.312.2

10.1

5.2

2.2

5.6

11.912.5

6.7

0

2

4

6

8

10

12

14pr

e-0.

5

pre-

0.75

pre-

1.0

2w

0.5

2w

0.75

2w 1

.0

4w

0.5

4w 0

.75

4w

1.0

pre/

po 0

.5

2w/4

w 0

.5

non-

trea

ted

Page 13: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

Conclusions

Applications of Sandea are most effective prior to 4 weeks after emergence.

Page 14: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

Conclusions

Applications of Sandea are most effective prior to 4 weeks after emergence.

Early season weed competition reduced yield for late application treatments.

Page 15: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

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.

Page 16: Purple Nutsedge Control and Cucumber Tolerance to Sandea (Halosulfuron).

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.