Strawberry and Raspberry Pest Management in Wisconsin

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HERBICIDE USE Before using an herbicide, read and follow the label directions! Herbicides are
registered for use on specific crops. Use only registered materials. The
container label gives detailed instructions for safe use. Herbicide
effectiveness depends on application rate, method, soil temperature,
soil moisture, soil texture and organic matter, target weed species, and
rainfall and weather conditions following herbicide application.
Cultivate throughout the first season and renovate after harvest in
subsequent seasons to reduce your herbicide needs. Growers using an
herbicide for the first time or using an herbicide on a new cultivar
should limit the treated area until they are familiar with the herbicide’s
effectiveness and crop safety at that location. Apply herbicides with a
boom sprayer and flat fan nozzles at 15–30 psi pressure. Calibrate
sprayers to deliver 10–40 gal/a of finished spray solution unless
otherwise stated on the label. Calibrate equipment at least once each
season. Uniform and controlled application is essential. As part of the
calibration process, adjust boom/nozzle height in order to obtain the
correct overlap of adjacent nozzle spray patterns for uniform delivery
(800 nozzles should be closer to target than 600 nozzles). Clean sprayers
after use to prolong equipment life.
The weed management schedules in table 8 list herbicides that are
registered for use on strawberries in Wisconsin. Products are listed
alphabetically and represent treatment options for each period
covered. The inclusion of product names is not an endorsement of a
particular manufacturer’s brand.
2,4-D amine formulation There are many 2,4-D formulations on the market. Not all are labeled for
use on strawberry. Examine the label to make sure that your
formulation is labeled for use on strawberry. Make sure your supplier
knows you need 2,4-D for use on strawberry and use only approved
formulations. Do not use ester formulations.
Chateau (flumioxazin) Chateau is registered with a supplemental label that must be in the
user’s possession at the time of application. Also, follow all directions,
restrictions, and precautions on the main EPA registered label plus the
supplemental label. Chateau is a broad-spectrum herbicide with
primarily preemergent action, but with some post-emergent activity as
well. Three use patterns are allowed for strawberries in Wisconsin.
Chateau is a long-acting herbicide that should control weeds from
application through harvest. It is a good alternative to continued use of
Sinbar. Using Chateau in early spring and Sinbar at renovation should
provide season-long control. Further, Chateau and Sinbar have very
different modes of action so developing resistance is less likely.
Dacthal (DCPA) On sandy soils, Dacthal provides fair to good control of annual grasses
and some broadleaf species. It gives poor control of most broadleaves,
particularly on heavier soils. Dacthal can be applied to young plants
with little danger of crop injury. However, soil must have been recently
tilled for Dacthal to be effective.
Devrinol (napropamide) Devrinol is a preemergent herbicide that provides good control of
many annual grasses, chickweed, pigweed, and purslane. This product is
difficult to keep in suspension, so maintain good agitation in the spray
tank during application. Devrinol must be watered in within 24 hours.
Fusilade (fluazifop-P-butyl),
Poast (sethoxydim),
Select (clethodim)
Fusilade, Poast, and Select Max are effective only against grass weeds.
They will not control sedges or rushes even though these weeds may
look like grasses or have a “grass” common name. Check the product