Devrinol 50-DF

Manufacturer
United Phosphorus
Category
Herbicides
Registered until
2027-12-31
Registration number
25231
Active materials
Links

DIRECTIONS FOR USE

GENERAL USE PRECAUTIONS

Read all label directions before using. Apply this product only as specified on the label.
Use only for recommended purposes and at recommended rates.
Do not overdose.
DEVRINOL 50-DF is recommended for use on mineral soils only. Not recommended for use on soils with over 10% organic matter.
To avoid injury to crops not specified on the label, do not plant until 12 months after the last DEVRINOL 50-DF application.
Do not apply more than once per season.
Spraying on ground heavily covered with leaves or trash may adversely affect weed control.
Do not apply to frozen ground.
It is recommended that this product not be applied in a way that will contact workers or other persons, either directly or through drift. Only handlers wearing personal protective equipment may be in the area during application.

GENERAL USE INFORMATION

DEVRINOL 50-DF is a selective surface-applied or incorporated herbicide for use in certain types of newly planted or established crops. DEVRINOL 50-DF does not control established weeds. All weed growth and crop stubble in the fields must be thoroughly worked into the soil prior to planting. Spray equipment should be carefully calibrated before use and checked frequently during application to be sure nozzles are operating properly and are delivering a uniform spray pattern. Apply the recommended rate of DEVRINOL 50-DF in 200 to 900 litres of water per hectare in a low pressure boom-type sprayer.
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.
DO NOT apply by air.

Buffer zones:

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 sensitive terrestrial habitats (such as grasslands, forested areas, shelter belts, woodlots, hedgerows, riparian areas and shrublands), sensitive freshwater habitats (such as lakes, rivers, sloughs, ponds, prairie potholes, creeks, marshes, streams, reservoirs and wetlands) and estuarine/marine habitats.
When a tank mixture is used, consult the labels of the tank-mix partners and observe the largest (most restrictive) buffer zone of the products involved in the tank mixture.
When mixing DEVRINOL 50-DF, make a slurry and add to a nearly filled spray tank with adequate agitation. This will enhance initial mixing.
Be sure the spray tank, boom and nozzle have been thoroughly flushed with clean water before use. Sufficient jet or mechanical agitation should be provided during the filling operation and during application.
Allow the pump to run several minutes before application to insure proper suspension and mixing. The suspension should not be left in the spray tank for prolonged periods; batches should be mixed and applied the same day.

APPLICATIONS AND RATES


FRUIT CROPS

DEVRINOL 50-DF can be used on the following crops:
- Newly planted or established strawberries.
- Established grapes.
- Newly planted or established caneberries (blackberries, raspberries, boysenberries and loganberries).
- Highbush blueberries.
- Cultivated lowbush blueberries.
Where recommended for use on established crops, apply DEVRINOL 50-DF only to stands that have been established for at least one year in the field, orchard or vineyard. Where recommended for use on newly planted crops, application may be made immediately after transplanting.
Use as a directed spray and avoid contact with fruit or foliage. Do not apply when fruit is on the ground during the harvest period. Do not graze treated areas.
To avoid injury to crops not specified on the label do not plant until 12 months after the last DEVRINOL 50-DF application.
Do not apply DEVRINOL 50-DF to frozen ground. For best 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 (June, July and August), a shallow incorporation to a depth of 2.5 to 5 cm or an irrigation (sprinkler or flood) with sufficient water to wet the soil to a depth of 5 to 10 cm is necessary.
Newly planted or established strawberries - Application of DEVRINOL 50-DF should be delayed until the desired number of daughter plants have become established. Do not apply from bloom to harvest. See paragraph below.
Established grapes: See paragraph below caneberries.
Tank Mix with GRAMOXONE®: If the use of this tank mix is desired, add the required DEVRINOL 50-DF to the spray tank followed by the required amount of GRAMOXONE®. Apply 9 kg of DEVRINOL 50-DF plus 5.5L of GRAMOXONE® in 1100 L water per broadcast hectare as a directed spray to the base of vines. Avoid Contact with foliage, fruit, young growing shoots, suckers and green bark. Make only one application per season.
Newly planted or established caneberries (blackberries, raspberries, boysenberries and loganberries): See paragraph below.
Apply 9 kg DEVRINOL 50-DF per broadcast hectare to the soil surface for control of all weeds listed (WEEDS CONTROLLED BY 9 KG/HA). Apply in the fall through early spring prior to weed emergence.
Highbush Blueberries: Annual Grasses and some Broadleaf Weeds - Apply one application per season of 9 kg of DEVRINOL® 50-DF per broadcast hectare in a band. Apply in the fall through early spring prior to weed emergence. Do not apply to frozen ground. Do not apply within 70 days of harvest.
Cultivated Lowbush Blueberries: Germinating Annual Grasses and Broadleaf Weeds: Apply 9 kg of DEVRINOL® 50-DF per broadcast hectare in late fall/early spring when blueberries are dormant. Make only one application per season. Do not apply within 70 days of harvest.
Cranberries: For the control of grass weeds (including rice cut-grass) apply 9-13.4 kg of DEVRINOL 50-DF per hectare. Apply only one application per year as a broadcast application. Application should be made in late winter (BC only) or spring - fall application is prohibited. If rainfall does not occur after treatment, irrigate with sufficient water to wet the soil to a maximum depth of 10cm.
DEVRINOL 50-DF Tank Mixed with Residual Herbicides for Annual Weed Control
Consult the residual herbicide labels for other directions and precautionary information.
Raspberries (British Columbia Only): For use on soils with a range of 8-10% organic matter. Apply a tank mix of 4 kg of DEVRINOL 50-DF plus 412 to 837 g of SINBAR per hectare preemergence to weed growth or after weed removal; for best activity apply to moist soil. If no rain occurs shortly after application, irrigate to activate the chemicals.

VEGETABLE and FIELD CROPS


BASIL

For control of broadleaf weeds and grasses, apply DEVRINOL 50DF at a rate of 2.2-4.4 kg/ha in 200 to 900 L water/ha. One application per year by ground or preplant incorporated. Usual rotational crop restrictions apply.
To avoid injury to crops not specified on the label, do not plant until 12 months after the last DEVRINOL 50-DF application.
CAUTION: Use of DEVRINOL at the high label rates of application may result in temporary crop stunting or retardation however crops will outgrow the injury and yield is unaffected.

ASPARAGUS, TOMATOES AND TOBACCO

To avoid injury to crops not specified on the label do not plant until 12 months after the last DEVRINOL 50-DF application.
Asparagus (Seedlings and new Plantings)
Apply to the soil surface 4.5 to 9 kg of DEVRINOL 50-DF per broadcast hectare preemergent to crop and weeds. Refer to WEEDS CONTROLLED lists for listed weeds and use of appropriate rate. Make only one application per season. Use the lower rate on light soils (coarse textured sandy and sandy-loam). For best results, irrigate if rainfall does not occur within two days after application.
Asparagus (Established)
Tank mix with PRINCEP NINE-T (simazine) - apply a tank mix of 9 to 13.4 kg of DEVRINOL 50-DF plus 1.5 to 2.75 kg of PRINCE®P NINE-T® in 150 to 300 L water per hectare. Apply preemergent to established beds with a field sprayer. Make only one application per season. Do not apply within 6 days of harvest.

TOMATOES (Direct seeded and Transplanted)
Apply and incorporate before planting 2.25 to 4.5 kg DEVRINOL 50-DF per broadcast hectare. Use the lower rate on light soils (coarse textured-sandy and sandy-loam). On flat-planted or bedded crops apply, before planting, to well-worked soil that is dry enough to permit thorough incorporation to a depth of 2.5 to 5 cm. Incorporate the same day as applied, using equipment which will result in uniform incorporation of the herbicide to the desired depth.
If broadleaf weeds not listed on this label become a problem during the growing season, follow with a sequential application of a registered broadleaf herbicide.

Tobacco (Transplanted)
Apply to the soil surface 2.25 to 4.5 kg DEVRINOL 50-DF per broadcast hectare. Use the lower rate on light soils (coarse textured-sandy and sandy-loam). Apply DEVRINOL 50-DF immediately following transplanting in a 25 to 30 cm band directly over the top of transplants, so that the treatment reaches the soil surface (See formula for band applications). For best results, lightly incorporate or irrigate if rainfall does not occur within 2 days after application.
Post-Harvest Operations: After harvesting or prior to planting of succeeding crops, a deep
moldboard or disc plowing operation must be carried out. For banded applications, work the soil at right angles to the row.
Rotational Crop Restrictions: When DEVRINOL 50-DF is used on tobacco post-transplant banded, small grains may be seeded in rotation in the fall to prevent soil erosion. These grains may be stunted but not otherwise adversely affected.
Tank Mixing with AMBUSH® 500EC: if timing of DEVRINOL 50-DF application coincides with that of AMBUSH 500EC for insect control, a tank mix may be used. Follow directions on DEVRINOL 50-DF and AMBUSH 500EC labels for appropriate timing, rates and precautions.
For all other labelled uses of DEVRINOL 50-DF, to avoid injury to crops not specified on the label, do not plant until 12 months after the last application of DEVRINOL 50-DF.

CABBAGE, BROCCOLI, CAULIFLOWER AND BRUSSEL SPROUTS (DIRECT SEEDED AND TRANSPLANTED)
(BRUSSEL SPROUTS FOR THE PROVINCE OF BRITISH COLUMBIA ONLY)
For control of broadleaf weeds and grasses, apply DEVRINOL 50DF at a rate of 2.25 to 4.5 kg/ha pre-emergent or preplant incorporated. Use the lower rate on light soils (coarse textured-sandy and sandy-loam). One application per year by ground only, PHI 60 days. Usual rotational crop restrictions apply.
CAUTION: Use of DEVRINOL at the high label rates of application may result in temporary crop stunting or retardation however crops will outgrow the injury and yield is unaffected.

RUTABAGAS

Apply 2.2 - 4.4 kg/ha in 200-900 L water/ha pre-plant incorporated; broadcast. Make only one application per season. Shepherd's purse and Lady's thumb may escape treatment at this rate. Do not apply within 60 days of harvest.

Resistance-Management Recommendations
For resistance management, DEVRINOL 50-DF is a Group 15 herbicide. Any weed population may contain or develop plants naturally resistant to DEVRINOL 50-DF 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 DEVRINOL 50-DF or other Group 15 herbicides within a growing season (sequence) or among growing seasons 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. To delay resistance, the less resistance-prone partner should control the target weed(s) as effectively as the more resistance-prone partner.
Herbicide use should be based on an integrated weed management program that includes scouting, historical information related to herbicide use and crop rotation, and considers tillage (or other mechanical control methods), cultural (for example, higher crop seeding rates; precision fertilizer application method and timing to favour the crop and not the weeds), biological (weed-competitive crops or varieties) and other management practices.
Monitor weed populations after herbicide application for signs of resistance development (for example, only one weed species on the herbicide label not controlled). If resistance is suspected, prevent weed seed production in the affected area if possible by an alternative herbicide from a different group. Prevent movement of resistant weed seeds to other fields by cleaning harvesting and tillage equipment when moving between fields, and planting clean seed.
Have suspected resistant weed seeds tested by a qualified laboratory to confirm resistance and identify alternative herbicide options.
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.

Registered for culturesRatePreharvest Interval
Basil2.2 - 4.4 l
Asparagus4.9 - 9 l
Tomatoes2.25 - 4.5 l
Tobacco2.25 - 4.5 l
Cabbage2.25 - 4.5 l60
Broccoli2.25 - 4.5 l60
Cauliflower2.25 - 4.5 l60
Brussels sprouts2.25 - 4.5 l60
Rutabagas2.2 - 4.4 l60
Blackberries9 l
Raspberries9 l
Loganberry9 l
Blueberries9 l70
Cranberries9 - 13.4 l70