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Publication 75S - 2007
Chapter 16. Nursery and Ornamental Crops

Author: OMAFRA Staff
Creation Date: 17 May 2007
Last Reviewed: 17 May 2007

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Table of Contents

  1. New Treatment - Amitrole 240
  2. PDF Format
  3. Publication 75, Guide to Weed Control
  4. Related Links
  5. For more information

New Treatment - Amitrol 240

For control of annual grass and broadleaf weeds applied only to Spruce (Picea spp.).

Amitrol 240
Trade Name 
Active Ingredient
amitrole
Formulation
SC
Rate per hectare (active)
0.39 to 0.69 kg/ha
Rate per hectare (product)
1.7 to 3.0 L/ha
Rate per acre (product)
0.68 to 1.2 L/ ac

Precautions

  • To be applied only on spruce (Picea spp.)
  • Apply postemergence to actively growing plants, good coverage is essential.
  • If weeds are mature, it is advisable to cut them and then spray the re-growth.
  • Do NOT disturb treated plants for 2 weeks after application.
  • Do NOT make postharvest applications after October 1.
  • To control quackgrass and Canada Thistle, apply in the spring or fall to actively growing plants that are 15-20 cm tall. Wait 10-14 day and then plough or disk.
  • Avoid application to the crop during periods of rapid shoot elongation in the spring.
  • Applications can be made in the first year (0.68 L/ac) in either seedbed or transplants, but only after the seedlings have set bud.
  • The rate may be increased to 1.2 L/ac for actively growing seedlings or transplant bareroot spruce beyond the first year.

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