Highbush Blueberries - Established Plantings: Postemergence Grass Herbicides

Pub 75: Guide to Weed Control > Berry Crops > Highbush Blueberries (Established Plantings): Postemergence Grass Herbicides

Excerpt from 2010-2011 Chapter 14, Publication 75, Guide to Weed Control, Order this publication

Poast Ultra + Merge
Venture L
Cane and Bush Berries Herbicide Ratings:
from Tree Fruit Herbicide Rating Tables (Table 15-1) (PDF 110k)
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Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).

New and established plantings.
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. 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 45° will give better coverage.
Do NOT use flood jet or hollow cone nozzles.
Do NOT apply if rain is expected within one hour after application.
Do NOT apply closer than 15 days to harvest.

Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).

New and established plantings.
Apply POST to actively growing grasses before tillering.
Apply at 0.6 L/ha (0.24 L/ac) at 2-5 leaf stage of volunteer corn.
Apply at 0.8 L/ha (0.32 L/ac) at 2-5 leaf stage of volunteer wheat and barley.
Apply at 1 L/ha (0.4 L/ac) at 2-5 leaf stage of annual grasses (2 leaf for foxtails).
Apply at 2 L/ha (0.8 L/ac) at 3-5 leaf stage of quackgrass and wirestem muhly. Thorough preplant tillage will ensure more uniform quackgrass emergence. Cultivate after 7 days.
Do NOT apply closer than 30 days to harvest.

Crops