Berries Production Guide

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Weeds

This section was updated - 08 March 2021

First Shoot Removal (Shoot Burning)

Removing the first flush(es) of new shoots can be very beneficial in balancing new shoot growth with fruit production. It can be done by hand (in small plantings) or by carefully applying a directed herbicide spray along both sides of the rows. The nozzle should be as low as possible and seldom more that 30 cm above the ground. For best results it should be done before the canes are about 10 cm high and generally no later than May 1. Late applications or excessive rates of Goal can severely restrict the re-growth of primocanes resulting in severe damage to the vigour of the planting. New or weak plantings need to be treated particularly carefully, i.e. use low rates and make application early, just after shoot emergence. Spray only under very calm conditions at slow tractor speeds and at a low pressure (less than 250 kPa) to avoid drift.

Note: Herbicide application rates are listed on pesticide labels and in the production guide for broadcast or total field coverage. If spraying a band over the row area only, then the treated area is only a portion of the whole field and rates must be reduced accordingly. For example, when spraying 1 m bands on rows 3 m apart, only one third of the field is treated.

Apply:

Goal 2XL (240 g/L oxyfluorfen) at 1.0 L/ ha (0.4 L/acre) in at least 500 L of water/ha (200 L/acre). This is a broadcast rate—do not apply this rate to one acre of raspberry field area (see note above). Treat primocanes that are 5 to 15 cm (2 to 6 in) high by spraying a one metre band directed towards the row. Use a higher rate of up to 2.0 L/ha (0.8 L/acre) only on vigorous fields if the majority of primocanes have reached the maximum height of 15 cm (6 in) or when hot, dry conditions precede the application. Apply with a non-ionic surfactant (e.g. Companion) at 2.5 L/1000 L of spray solution. Cloudy, damp weather will maximize the effectiveness of Goal. Do not apply within 50 days of harvest. Apply only once per season; or

Note: some growers have achieved good control, with reduced risk of crop injury, by reducing the rate of Goal to 0.5 L/ha (0.2 L/ha) and spraying very early, at first shoot emergence.

Ignite 15 SN (150 g/L glufosinate ammonium) at 6.67 L/ha (2.7 L/acre) in a minimum of 330 L/ha (130 L/acre) of water. This is a broadcast rate – do not apply this rate to one acre of raspberry field area (see note above). Treat primocanes that are 10 to 20 cm (4 to 8 in) high by spraying a 1 m band directed towards the primocane row. Do not contact desirable canes, plants or vegetation. Do not apply within 1 m of adjacent crops or environmentally sensitive areas such as waterbodies and wildlife habitat.

Note: Local experience has shown that Goal 2XL is best applied when the weather is wet and cool. Ignite 15 SN works best when weather is dry and warm.

Aim EC (240g/L carfentrazone-ethyl) at 150 ml/ha (60 ml/ac). Apply with a surfactant such as Agral 90 or Ag-Surf at 0.25 litres per 100 litres of spray solution, or Merge at 1 litre per 100 litres spray solution.  Treat primocanes that are young and approximately 13 cm high by spraying a one metre band directed towards the row.  Avoid contact with desirable canes, plants and vegetation.  Do not apply within 30 days of harvest.  Maximum two applications per year.

 

Preplow Clean Up of Perennial Weeds

Prior to planting it is critical to control existing perennial weeds and brush. Glyphosate formulations such as Roundup or Touchdown effectively control most tough weeds. See Pest Management in this guide.

YEAR OF PLANTING
PRIOR TO WEED EMERGENCE

Devrinol 50DF or Devrinol DF-XT (50% napropamide)

 9 kg/ha
(3.6 kg/acre)
  • Apply after planting but prior to weed emergence. If rainfall does not occur within 7 days for a spring or fall application or 2 days for a summer application, irrigate with sufficient water to wet the soil to a depth of 5 to 10 cm.
  • Apply in enough water to get even distribution over the soil surface. This is usually accomplished in the range of 200 to 900 L/ha (80 to 360 L/acre) of water.
PRIOR TO WEED EMERGENCE Devrinol 10G
(10% napropamide)

45 kg/ha
(18 kg/acre)
  • Apply in the fall through early spring prior to weed emergence.
  • Requires mechanical incorporation, adequate irrigation or natural moisture for optimum results. The treatment must reach the zone of weed seed germination.
  • If rainfall does not occur within 7 days for a spring or fall application or 2 days for a summer application, a shallow incorporation to a depth of 2.5 to 5 cm or an irrigation with sufficient water to wet the soil to a depth of 5 to 10 cm is necessary.
ANNUAL GRASSES AND QUACKGRASS Venture L (125 g/L fluazifop-p- butyl) 1.2 to 2.0 L/ha
(480 to 800 mL/acre)
  • Apply at the 2 to 6 leaf stage of annual grasses and to actively growing quackgrass that has 3 to 5 fully developed leaves.
  • Use the high rate for quackgrass control.
  • Apply in 50 to 200 L of water per hectare (20 to 80 L/acre). Use the higher volume for dense weed infestations.
  • Warning: Women capable of bearing children should avoid exposure to Venture L.
Poast Ultra (450 g/L sethoxydim) 0.47 to 1.1 L/ha
(200 to 440 mL/acre)
  • Apply at the 1 to 6 leaf stage of annual grasses and to actively growing quackgrass that has 1 to 6 leaves.
  • Use the high rate for quackgrass control
  • Apply with the adjuvant, Merge, at a rate of 1% of water volume used.
ANNUAL WEEDS

 

(Between the row only)		 Aim EC (240 g/L carfentrazone -ethyl) 37 to 117 mL/ha
(15 to 47 mL/acre)
  • Apply between the rows with a hooded sprayer to emerged weeds. Crop injury will occur if drift is allowed to come in contact with green stem tissue, leaves, blooms or fruit.
  • To improve control, apply with surfactants such as Agral 90 or Ag-Surf at 0.25% (0.25 L/100 L of water) or Merge at 1% (1 L/100 L of water).
NOTE: Herbicide application rates are listed on pesticide labels and in the production guide for broadcast or total field coverage. If spraying a band over the row area only, then the treated area is only a portion of the whole field and rates must be reduced accordingly.


ESTABLISHED PLANTINGS
PRIOR TO WEED EMERGENCE Devrinol 50DF
(50% napropamide)

See above rates

See comments above
Devrinol 10G (10% napropamide)

See above rates

See comments above
Princep Nine-T (90% simazine)


Simadex 500 (500 g/L simazine)


Simazine 480 (480 g/L simazine)		 2.0 to 2.5 kg/ha (0.8 to 1.0 kg/acre)

3.6 to 4.5 L/ha (1.4 to 1.8 L/acre)

3.8 to 4.7 L/ha (1.5 to 1.9 L/acre)
  • Apply in early spring as a directed spray in a minimum of 300 L/ha (120 L/acre) of water in plantings established at least one year. Do not spray young shoots.
  • Requires surface moisture for activation. Loss of activity and poor weed control may result under prolonged, dry conditions. Not effective on established weeds.
Sinbar 80W or WDG (80% terbacil)

Plus

Devrinol 50 DF (napropamide)		 410 to 840 g/ha (166 to 340 g/acre)

plus

4 kg/ha (1.6 kg/acre)
  • Direct application below the canes in the fall or early spring to plants established at least one year.
  • Soil moisture is necessary for activation.
  • Will control annual weeds when applied prior their emergence or if actively growing but less than 5 cm tall or across.
  • Apply in a minimum of 200 L/ha of water (80 L/acre).
  • Use on soils with a range of 8 to 10% organic matter.
  • Do not apply within 70 days of harvest.

Casoron G-4 (dichlobenil)

175 kg/ha
(69 kg/acre)
For spot control apply 17.5 g/m2
  • Seedling annual weeds, quackgrass, thistles, horsetail, yellow nutsedge, and bracken fern will be controlled or suppressed.
  • Apply in late fall or early winter. Do not apply in spring as injury will occur to new shoots. Apply in dry conditions when temperature is below 15°C. (This will prevent the herbicide from sticking to the canes.) Applications made above this temperature must be irrigated in immediately or be followed by rainfall.
  • Do not apply within 100 days of harvest.
  Chateau WDG (51.1% flumioxazin)

420 g/ha (168 g/acre)
  • Use on well-drained, coarse and medium-textured soils with less than 5% organic matter.  Do not apply to fine-textured soils.  
  • Apply as a uniform broadcast application  or as a uniform band directed at the base of the canes. Do not apply allow spray to come in contact with crop. 
  • Requires soil moisture to activate and set the herbicide. The preferred application timing is in the fall to maximize potential for rainfall to activate and set the herbicide.
  • Do not make more than two applications in a growing season. Do not make a sequential application within 30 days of the first application.
  • Do not apply within 7 days of harvest. 

POST EMERGENCE

Gramoxone
(paraquat)

alone or with a simazine product listed above

5.5 L/ha
(2.2 L/acre)
  • Apply after harvest or in spring before petal drop or fruit set in 1100 L/ha of water (440 L/acre).
  • Do not treat young shoots to be kept for fruiting.
  • Note: Only apply to established crops where first shoot removal is not planned.
  Prism SG (25% rimsulfuron) 60 g/ha (24 g/acre)
  • Apply a directed, early postemergence spray to actively growing weeds.
  • Minimize contact with raspberry plants.
  • Use on crops that have gone through at least one growing season and are in good health and vigour
  • Use a non-ionic surfactant such as Cittowett Plus, Agral 90 or Ag-Surf at 2 L/1000 L of spray mix.
  • When applied as a banded treatment, Prism may be applied twice per year.
  • Do not apply within 21 days of harvest. 

ANNUAL WEEDS

(Between the row only)

Aim EC

(240 g/L carfentrazone -ethyl)

37 to 117 mL/ha

(15 to 47 mL/acre)
  • Apply between the rows with a hooded sprayer to emerged weeds. Crop injury will occur if drift is allowed to come in contact with green stem tissue, leaves, blooms or fruit.
  • To improve control, apply with surfactants such Agral 90 or Ag-Surf at 0.25% (0.25 L/100 L of water) or Merge at 1% (1 L/100 L of water).
  • Do not apply within 15 days of harvest.

ANNUAL GRASSES AND QUACKGRASS

Venture L
(fluazifop-p- butyl)

1.2 to 2.0 L/ha
(480 to 800 mL/acre)
  • Apply as per Venture L above.
  • Apply in the spring before bloom or in the Fall. 
  • Do not apply within 30 days of harvest.
  • Warning: Women capable of bearing children should avoid exposure to Venture L.
  •  

Poast Ultra (sethoxydim)

0.47 to 1.1 L/ha
(200 to 440 mL/acre)
  • Apply at the 1 to 6 leaf stage of annual grasses and to actively growing quackgrass that has 1 to 6 leaves.
  • Use the high rate for quackgrass control.
  • Apply with the adjuvant, Merge, at a rate of 1% of water volume used.
  • Do not apply within 37 days of harvest.
Note: Herbicide application rates are listed on pesticide labels and in the production guide for broadcast or total field coverage. If spraying a band over the row area only, then the treated area is only a portion of the whole field and rates must be reduced accordingly.

 

Viewing Section 5 of 10