Herbicide Recommendations for 2nd Year & Established Asparagus: After Last Cutting (Postemergence Grass Herbicides)

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

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

Precautions

Apply to asparagus ONLY after the spears have been harvested.
Do NOT treat spears prior to or during harvest.
Apply when majority of annual grasses are in the 1-6 leaf stage or until volunteer corn is up to 25 cm tall.
Grasses emerging after application will not be controlled.

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.