Prior to planting it is critical to control existing perennial weeds and brush. Use of glyphosate formulations such as Roundup or Touchdown effectively control tough weeds without creating a soil residue concern.
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.
YEAR OF PLANTING
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PRIOR TO WEED EMERGENCE |
Devrinol 50DF (50% napropamide) |
9 kg/ha (3.6 kg/acre) |
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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.
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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 of water.
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PRIOR TO WEED EMERGENCE |
Devrinol 10G (10% napropamide) |
45 kg/ha (18 kg/acre) |
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Apply in the fall through early spring prior to weed emergence.
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Requires mechanical incorporation, adequate irrigation or natural moisture for optimum results. The treatment must reach the zone of weed seed germination.
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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 irrigation with sufficient water to wet the soil to a depth of 5 to 10 cm is necessary.
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ESTABLISHED PLANTINGS
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PRIOR TO WEED EMERGENCE |
Devrinol 50DF (50% napropamide) |
as above |
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Devrinol 10G (10% napropamide) |
as above |
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Authority (480g/L sulfentrazone) |
0.29 L/ha (0.12 L/acre) |
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Apply as a broadcast spray or as a uniform band directed at the base of canes. Do not allow spray to come in contact with crop. Apply a single spray in a minimum water volume of 100L/ha (40L/acre). At least 0.5 cm of rainfall or irrigation is necessary to activate the herbicide. Do not apply within 3 days of harvest
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Princep Nine-T (90% simazine) |
2.5 to 3.75 kg/ha (1 to 1.5 kg/acre) |
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Apply in early spring as a directed spray in a minimum of 300 L/ha 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.
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AFTER WEEDS EMERGE |
Gramoxone (200g/L paraquat) alone or with a simazine product listed above |
5.5 L/ha (2.2 L/acre) |
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Apply in spring before shoot emergence or after harvest in 1100 L/ha of water (440 L/acre).
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Do not treat young shoots to be kept for fruiting.
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Note: Only apply to established crops where first shoot removal is not planned.
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Prism SG (25 % rimsulfuron) |
60 g/ha (24 g/acre) |
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Apply a directed, early postemergence spray to actively growing weeds.
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Minimize contact with blackberry plants.
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Use on crops that have gone through at least one growing season and are in good health and vigour
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Use a non-ionic surfactant such as Cittowett Plus, Agral 90 or Ag-Surf at 2 L/1000 L of spray mix.
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When applied as a banded treatment, Prism may be applied twice per year.
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Do not apply within 21 days of harvest.
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ANNUAL WEEDS (Between the rows only) |
Aim EC (240 g/L carfentrazone-ethyl) |
37 to 117 mL/ha (15 to 47 mL/acre) |
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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.
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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).
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Do not apply within 15 days of harvest.
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