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Herbicide Recommendations for 2nd Year & Established Asparagus: Postemergence Grass Herbicides

Author: OMAFRA Staff
Creation Date: 25 November 2002
Last Reviewed: 20 May 2008

Pub 75: Guide to Weed Control > Vegetable Crops > Herbicide Recommendations for 2nd Year & Established Asparagus: Postemergence Grass Herbicides

Excerpt from 2008 Chapter 13, Publication 75, Guide to Weed Control, Order this publication

Cover of Publication 75, Guide to Weed ControlTable of Contents

  1. Poast Ultra + Merge
  2. Vegetable Herbicide Weed Control Ratings (Table 13 -1) (PDF file - 86kb)
  3. Other Asparagus Weed Control Recommendations:
  4. Related Links

Poast Ultra + Merge

Trade Name Poast Ultra + Merge
Active Ingredient
sethoxydim
+ surfactant/solvent
Formulation
450 g/L
 
Rate per hectare (active)
0.15 to 0.5 kg/ha
1 to 2 L/ha
Rate per hectare (product)
0.32 to 1.1 L/ha
1 to 2 L/ha
Rate per acre (product)
0.13 to 0.45 L/ac
0.4 to 0.8 L/ac

Precautions

  • Apply to actively growing grasses.
  • For annual grass, use 0.32 L/ha. Apply at the 1-6 leaf stage (2-5 is optimum).
  • For volunteer grains, use 0.47 L/ha. Apply at the 1-6 leaf stage (2-5 is optimum).
  • For quackgrass, use 1.1 L/ha. Apply up to the 3 leaf stage. Thorough preplant tillage will ensure more uniform quackgrass emergence. Cultivate after 7 days in wide row crops. Use the high rate of Merge for quackgrass.
  • Use 100-200 L water/ha (40-80 L water/ac).
  • Grasses emerging after application will not be controlled.
  • Spray tips angled forward 45o will give better coverage.
  • Do NOT use flood jet or hollow cone nozzles.
  • Do NOT apply if rain is expected within 1 hr. after application.
  • Preharvest interval is 40 days.

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