Weed Control in Strawberries and Raspberries - Frequently Asked Questions

 
 
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 When is the best time to control weeds in Strawberries?
Weeds in strawberries should be controlled at a time when critical growth events (i.e. flowering, fruiting, daughter plant growth and establishment) are not taking place. Pre-planting weed control is crucial and may be accomplished by a range of techniques (mechanical, chemical, etc.). Post-planting weed control is usually carried out in early spring, during the renovation period (following harvest), or in late fall. Consult herbicide labels for weeds controlled, appropriate rates and safety measures. Do not over-apply chemicals (rates and number of applications).

What herbicides can be applied?
Planting Year
Weed Problem
Preplant
2-4 weeks
4-6 weeks
Late Summer
Late Fall
Emerged weeds (incl. rhizomatous perennials)
Glyphosate (spot treatment/directed spray)
. . . .
Annual weeds
Treflan EC
Rival DF/EC
Bonanza 400/480
Dacthal W-75
Dual II Magnum
.
Sinbar
.
Devrinol
50DF3
Sinbar
Annual grasses & quackgrass
.
Venture L3
.
Venture L3
.
Seedling weeds (annual & perennial)
.
Gramoxone
.
Devrinol
50DF3
.
Fruiting Year
Weed Problem
Early Spring
Renovation
Soon After
Late Fall
Annual grasses & quackgrass
Venture L2,3
Poast Ultra
.
Venture L3
Venture L3
Annual weeds
Devrinol 50DF3
Glyphosate2 (spot treatment /directed spray)
Dacthal W-751
Aim EC2,3 (hooded spray)
Chateau WDG4
(hooded spray or broadcast)
Gramoxone
Sinbar1
Devrinol 50DF3
Dacthal W-751
Chateau WDG4
(hooded spray or broadcast)
Sinbar1
Devrinol 50DF3
Gramoxone
Dacthal W-751
Goal 2XL2,3
Canada Thistle
Glyphosate2
(spot treatment / directed spray)
Lontrel 3603
. .
1 Failure to irrigate after treatment may result in damage to plants
2 Consult label for appropriate pre-harvest intervals
3 Apply only once per season
4. Hooded spray for non-dormant plants.

* Adapted/Updated from MB Agriculture & Food Fruit Guide (2000)
** Product recommendations are for commercial plantings only

When is the best time to control weeds in Raspberries?
Similar to strawberries, weed control in raspberries should be conducted so as to avoid damaging plant parts, which affects survivability and future yields. Chemical weed control typically takes place pre-planting (1-2 years) or in early spring or fall in established plantings. Consult herbicide labels for weeds controlled, appropriate application rates and safety measures. Do not over-apply herbicides (rate and number of applications).

The use of grass between rows can decrease weed pressure, while also improving accessibility during the season. This type of system is not compatible with some chemical treatments (e.g. Casaron G-4).

What herbicides can be applied?

Weed Problem
Year of Planting
Established Plantings
Pre-Planting
Post-Planting
Fall
Early Spring
Fall
Emerged weeds (incl. Rhizomatous perennials)
Glyphosate
.
.
.
.
Annual Grasses
.
Venture L
Poast Ultra
.
Venture L2,3
Poast Ulra
Venture L2,3
Annual weeds
Devrinol
50DF/10G3
Devrinol
50DF/10G3
Devrinol
50DF/10G3
Gramoxone
Simazine 80WP / 480 / Princep
Nine-T / Simadex Simazine
Aim EC2,3
(hooded spray)
Devrinol
50DF/10G3
Gramoxone
Casaron G-4/G-21
Stryke 4G1
Perennial weed seedlings
.
.
.
Simazine 80WP / 480 / Princep
Nine-T / Simadex Simazine
Gramoxone
Gramoxone
Canada Thistle
.
.
.
Casaron G-4/G-21
Stryke 4G1
Quackgrass
.
Venture L
Poast Ultra
.
Venture L2,3
Poast Ultra
Venture L3
1 Should only be applied to well established plantings (minimum 2 years) and then every 2 years
2 Follow label directions for appropriate pre-harvest intervals
3 Apply only once per season

* Adapted/Updated from MB Agriculture & Food Fruit Guide (2000)
** Product recommendations are for commercial plantings only.
*** Product listing in this article is not an indication of endorsement of any particular company or product.

Prepared by Robert Spencer, Ag-Info Centre, Alberta Agriculture and Rural Development

 
 
 
 
For more information about the content of this document, contact the Ag-Info Centre.
This information published to the web on June 26, 2003.
Last Reviewed/Revised on November 27, 2013.