Canada

Kerb SC

registration_expired
Dow AgroSciences - herbicide
30264

GENERAL INFORMATION
Kerb SC Herbicide is a selective herbicide used to control quackgrass, certain other perennial grasses such as orchardgrass and timothy, and most annual grasses, including wild oats and volunteer wheat. Kerb SC Herbicide also controls chickweed. Dandelion, thistles and other members of the Compositae family are not controlled by Kerb SC Herbicide.
Kerb SC Herbicide is readily absorbed by plants through the root system, translocated upward and distributed into the entire plant. The degree of translocation from leaf absorption is negligible. It can be applied pre-plant incorporated on certain crops, pre-emergence and post-emergence to weeds and all crops. Post-emergence applications
to weeds will not control weeds by foliar uptake, but rather by soil uptake once the product moves into the soil.

GENERAL USE PRECAUTIONS
Effect on soil type: Kerb SC Herbicide is ineffective and not recommended for application pre-emergence to weeds on highly organic peat or muck soils.
Grazing Restriction: Do not harvest or graze within 90 days after application of 4 L of Kerb SC Herbicide per hectare or for 60 days after rates of less than 4 L per hectare.
Caution: Do not use on pastures that contain high proportions of timothy, crested wheat grass or meadow Fescue, as severe stand reduction will occur.
DO NOT apply by air.
Reduce dosage accordingly for band treatment.

Rotational crops

Observe a plantback interval of 30 days for leafy vegetables (except Brassica vegetables), 90 days for root and tuber vegetables and 360 days for all other crops.

Field sprayer application
DO NOT apply during periods of dead calm. Avoid application of this product when winds are gusty. DO NOT apply with spray droplets smaller than the American Society of Agricultural Engineers (ASAE) medium classification. Boom height must be 60 cm or less above the crop or ground.

Tank Mixtures

For information on tank mixing with any additive, pesticide or fertilizer not specifically recommended on this label, consult Dow AgroSciences Canada Inc. at 1-800-667-3852 or www.dowagro.ca. The user assumes all risks and liability in connection with the use of tank mixes that do not appear on this label or that are not specifically recommended by Dow AgroSciences Canada Inc.

DIRECTIONS FOR USE

READ ALL DIRECTIONS CAREFULLY BEFORE APPLYING. FAILURE TO FOLLOW LABEL INSTRUCTIONS MAY RESULT IN ERRATIC WEED CONTROL OR CROP DAMAGE.

When applying to more than 75 hectares per day (420 L of product or 168 kg active ingredient), workers must use closed mixing and loading equipment and a closed cab tractor for application. A closed cab is a chemical resistant barrier that completely surrounds the occupant of the cab and prevents contact with the pesticide or treated surfaces outside the cab.

Mixing Instructions
Mix Kerb SC Herbicide in water and apply uniformly with a standard low pressure herbicide sprayer with flat fan nozzles at 300-500 litres of water per hectare.

Methods of Application

Kerb SC Herbicide can be either fall or spring applied depending upon the crop involved.

A) Fall application (Alfalfa, Trefoil)
Kerb SC Herbicide should be applied in the fall from late September to early November. Exact timing depends on soil temperature and ground freezing. Best results are obtained when soil temperature is low but above freezing and soil moisture is high. Surface applications are most effective if followed by rain in a day or two or a light overhead irrigation (1.25 to 2.50 cm). Kerb SC Herbicide acts through root absorption.

Established Pastures: To control foxtail barley (Hordeum jubatum) in established grass pastures, or grass/legume (alfalfa, trefoil) pastures, apply Kerb SC Herbicide in late fall prior to freeze-up. On brown, dark brown, or gray wooded soils use 1.1 L of Kerb SC Herbicide per hectare. On thin black or black soils use 1.4 L of Kerb SC Herbicide per hectare. Some of the less tolerant pasture grass species, (e.g. tall fescue, creeping red fescue) may experience a 10-15% reduction as a result of the treatment.

B) Spring Application
(Seed Alfalfa): Kerb SC Herbicide can be applied in the spring as a surface spray to control annual grasses, including wild oats. For optimum control the soil temperature should be cool. If soil temperature is high and moisture content low a light incorporation is recommended.

CROP RECOMMENDATIONS

ALFALFA, TREFOIL (in first year and established plantings)

To Control: Annual grasses, Volunteer grain, Wild Oats
Kerb SC Herbicide Per hectare♦: 2.2 L
Timing: Fall (Spring-Seed Alfalfa)

To Control: Quackgrass, orchardgrass, timothy, chickweed
Kerb SC Herbicide Per hectare♦: 2.8-4 L
Timing: Fall

♦Note: Do not use more than 2.8 L per hectare in Spring Application.)

Dodder Control in Alfalfa and Trefoil grown for seed
4 L of Kerb SC Herbicide per hectare. Apply in the fall (late September to early November) or early spring (early April to early May); spring application will be effective ONLY if low temperatures prevail and moisture is available following application. Spot treatment of Dodder may be necessary as complete control of Dodder is not achieved with Kerb SC Herbicide.

ORNAMENTALS (Established)

Iris, peony, ground covers (except Vinca minor) and any coniferous trees and shrubs which are tolerant of Kerb SC Herbicide. To control quackgrass, most annual grasses and chickweed in established plantings, apply Kerb SC Herbicide in the fall at the rate 37 mL per 100 square metres. DO NOT USE Kerb SC Herbicide ON OR PERMIT TREATED AREAS TO DRAIN ONTO TURF GRASSES (EXCEPT FOR REMOVAL).

ORNAMENTAL NURSERY STOCK, CONTAINER GROWN (British Columbia only)

To control annual grasses and chickweed during the winter and spring in a sawdust: peat (3:1) medium for container grown coniferous trees and shrubs, apply Kerb SC Herbicide at a rate of 37 mL per 100 square metres in November to February. Do not apply to stock that has been transplanted less than six months.

STRAWBERRIES (Maritimes and British Columbia only)

To control annual grasses and chickweed, apply Kerb SC Herbicide from late September to early November at a rate of 2.8 L per hectare. Best results are obtained when soil temperatures are low but above freezing and when soil moisture is high.

APPLES AND PEARS

To control quackgrass and annual grasses apply Kerb SC Herbicide from late September to early November at a rate of 5.6 L of product per hectare or 56 mL per 100 square metres. Use only under trees established for at least one year. Best results are obtained when soil temperatures are low but above freezing and when soil moisture is high.

LOWBUSH BLUEBERRIES

To control perennial grasses including quackgrass and annual grasses, apply Kerb SC Herbicide from late September to early November at rates of 4.1 -5.6 L of product per hectare. Best results are obtained when soil temperatures are low but above freezing and when soil moisture is high.

Note:
Do not apply Kerb SC Herbicide to the above crops until all the fruits have been harvested.

LETTUCE (Direct seeded or transplanted)
To control germinating annual grasses and some broadleaf weeds, apply Kerb SC Herbicide once a year at 2.75 L of product per hectare. For direct seeded lettuce apply either as preplant incorporation, preemergent or postemergent with a pre-harvest interval of 55 days. For transplanted lettuce apply Kerb SC Herbicide 7-10 days post-transplant.

Note:
Do not replant lettuce in the Kerb SC Herbicide treated field in the same year as significant residues may result.

BUFFER ZONES TO PROTECT NON-TARGET SENSITIVE TERRESTRIAL HABITATS

Use of the following spray methods or equipment DO NOT require a buffer zone: hand-held or backpack sprayer and spot treatment.
The buffer zones specified in the table below are required between the point of direct application and the closest downwind edge of non-target sensitive terrestrial habitats (such as grasslands, forested areas, shelter belts, woodlots, hedgerows, riparian areas and shrublands).

Buffer Zone Table

Method of Application: Field sprayer♦
Crop:
 Established grass pastures, established grass/legume (alfalfa, trefoil) pastures, alfalfa grown for seed, trefoil grown for seed, strawberries, lettuce, established ornamentals
Buffer Zones (metres) Required for the Protection of:
Terrestrial habitat: 5
Crop: Lowbush blueberries, apples, pears
Buffer Zones (metres) Required for the Protection of:
Terrestrial habitat: 10

♦ For field sprayer application, buffer zones can be reduced with the use of drift reducing spray shields. When using a spray boom fitted with a full shield (shroud, curtain) that extends to the crop canopy, the labelled buffer zone can be reduced by 70%. When using a spray boom where individual nozzles are fitted with cone-shaped shields that are no more than 30 cm above the crop canopy, the labelled buffer zone can be reduced by 30%.

RESISTANCE MANAGEMENT RECOMMENDATIONS
For resistance management, Kerb SC Herbicide is a Group 15 herbicide. Any weed population may contain or develop plants naturally resistant to Kerb SC Herbicide and other Group 15 herbicides. The resistant biotypes may dominate the weed population if these herbicides are used repeatedly in the same field. Other resistance mechanisms that are not linked to site of action, but specific for individual chemicals, such as enhanced metabolism, may also exist. Appropriate resistance-management strategies should be followed.
To delay herbicide resistance:
Where possible, rotate the use of Kerb SC Herbicide or other Group 15 herbicides with different herbicide groups that control the same weeds in a field.
Use tank mixtures with herbicides from a different group when such use is permitted.
Herbicide use should be based on an IPM program that includes scouting, historical information related to herbicide use and crop rotation, and considers tillage (or other mechanical), cultural, biological and other chemical control practices.
Monitor treated weed populations for resistance development.
Prevent movement of resistant weed seeds to other fields by cleaning harvesting and tillage equipment and planting clean seed.
Contact your local extension specialist or certified crop advisors for any additional pesticide resistance-management and/or integrated weed-management recommendations for specific crops and weed biotypes.
For further information or to report suspected resistance, contact Dow AgroSciences Canada Inc. at 1-800-667-3852 or at www.dowagro.ca.

NOTICE TO USER: This pest control product is to be used only in accordance with the directions on the label. It is an offence under the Pest Control Products Act to use this product in any way that is inconsistent with the directions on the label. The user assumes the risk to persons or property that arises from any such use of this product.

Effective
Crops
Alfalfa, Lucerne
BBCH
0 - 0
Registred norm
2.2 - 4
Preharvest Interval
90
Crops
Strawberries
BBCH
0 - 0
Registred norm
2.8 - 2.8
Preharvest Interval
60
Crops
Apple trees
BBCH
0 - 0
Registred norm
5.6 - 5.6
Preharvest Interval
90
Crops
Pears
BBCH
0 - 0
Registred norm
5.6 - 5.6
Preharvest Interval
90
Crops
Blueberries
BBCH
0 - 0
Registred norm
4.1 - 5.6
Preharvest Interval
90
Crops
Lettuce
BBCH
0 - 0
Registred norm
2.75 - 5.6
Preharvest Interval
55