Velpar L CU

Registered until
Registration number
Active materials


VELPAR L CU Herbicide is a water dispersible solution to be mixed in water and applied as a broadcast spray for selective control of certain weeds and brush in blueberries, and in alfalfa grown for seed. It may also be applied undiluted to the soil for brush control. It is non-corrosive to equipment.
VELPAR L CU Herbicide provides preemergence and postemergence control of undesirable vegetation.
Applications to plants before leaves are fully expanded are more effective than later treatments.
Applications should not be made after target deciduous species have achieved full annual growth.
Foliar applications when vegetation is dormant or semi-dormant may not be effective in herbaceous plants.
VELPAR L CU Herbicide is absorbed through the roots and may demonstrate contact activity on foliage.
There is, however, limited long-term effect on woody species following foliar application only.
For brush control, soil applications are most effective.
Best results are obtained when VELPAR L CU Herbicide is present in the root zone during active growth of the target vegetation.
Symptoms usually appear in herbaceous plants within 2 weeks after application under warm, humid conditions, while 4 to 6 weeks may be required when weather is cool. If rainfall after application is inadequate to activate VELPAR L CU Herbicide in the soil, plants may recover from contact effects and continue to grow until sufficient rainfall moves VELPAR L CU Herbicide into the root zone.
Symptoms usually appear within 3 weeks in actively growing woody plants after sufficient rainfall has carried the herbicide into the root zone. Defoliation and subsequent refoliation may occur until root reserves are exhausted at which time susceptible plants die. The degree of control and duration of effect will vary with amount of chemical applied, soil texture and organic matter, rainfall, temperature, weed or brush species, soil moisture and other conditions.
Moisture is required to activate VELPAR L CU Herbicide in the soil.
The effectiveness of VELPAR L CU Herbicide may be reduced as the level of organic matter in the soil increases.


Calibrate equipment before spraying.
Do not use excessive agitation after initial mixing as foaming may result. Avoid storing mixed solutions of
VELPAR L CU Herbicide overnight where temperatures may fall below 7 degrees C. Do not apply more than 18 L/Ha per year. Do not apply to frozen or snow covered soil. Avoid overlapping and shut off spray while starting, turning, slowing or stopping in order to avoid injury to desirable trees. Do not use mist blowers.

(Ground Application Only, Do Not Apply by Air)
Apply VELPAR L CU Herbicide in the spring after pruning operations (burning or mowing) but before blueberries emerge. VELPAR L CU Herbicide controls most common grasses and many perennial broadleaved weeds, and such woody weeds as trailing blackberry, lamb-kill and hardhack.
Canada blueberry (Vaccinium myrtilloides) and some clones of the lowbush blueberry (Vaccinium angustifolium) are sensitive. Temporary defoliation of the lower leaves of the lowbush blueberry will occur, but plants recover.
Apply VELPAR L CU Herbicide at the rate of 6.0-8.0 litres per hectare, depending on percent organic matter and soil type. Use lower rates on low organic matter soils. Use higher rates on medium or heavy soils or on light soils containing >5% organic matter. Do not apply VELPAR L CU Herbicide to gravelly or rocky soils or to sand. DO NOT apply to any soils with less than 1% organic matter. DO NOT apply where the terrain does not permit even and accurate application. Avoid treating fields that may be subject to erosion following improved weed control, or areas of fields that are wet or poorly drained.
Overlapping applications or those made after blueberries emerge may cause severe crop injury.

Registered for culturesRate
Blueberries6 - 8 l