Canada

PrePass 480

registration_expired
Dow AgroSciences - herbicide
30423

DIRECTIONS FOR USE

GENERAL INFORMATION

Do not apply this product using aerial spray equipment except under conditions as specified within this label.
Overspray or drift to important wildlife habitats such as bodies of water, wetlands (e.g., sloughs), shelterbelts, woodlots and other cover on the edges of fields frequented by wildlife, should be avoided. Leave a 15 meter buffer zone between the last spray swath and the edge of any of these habitats.
PrePass 480 Herbicide, a water soluble liquid, mixes readily with water for application as a foliage spray for the control or destruction of most herbaceous plants. It may be applied through most standard industrial or field type sprayers after dilution and thorough mixing with water in accordance with the booklet instructions.
This herbicide moves through the plant from the point of foliage contact to and into the root system. Visible effects on most annual weeds occur within 2 to 4 days but on most perennial weeds may not occur until 7 to 10 days. Extremely cool or cloudy weather at treatment time may slow down activity of this product and delay visual effects of control. Visible effects are a gradual wilting and yellowing of the plant which advances to complete browning of above ground growth and deterioration of underground plant parts.
Delay application until vegetation has emerged to the stages described for control of such vegetation under the annual and perennial weed control sections of this booklet to provide adequate leaf surface to receive the spray. Unemerged plants arising from underground rhizomes or root stocks of perennials will not be affected by the spray and will continue to grow. For this reason best control of most perennial weeds is obtained when treatment is made at late growth stages approaching maturity.
Always use the higher rate of this product per hectare within the recommended range when weed growth is heavy or dense, or weeds are growing in an undisturbed (non-cultivated) area.
Do not treat weeds under poor growing conditions such as drought stress, disease or insect damage, as reduced weed control may result. Reduced results may also occur when treating weeds heavily covered with dust.
This product does not provide residual weed control. For subsequent residual weed control follow a label approved herbicide program. Read and carefully observe the cautionary statements and all other information appearing on the labels of all herbicides used.
Heavy rainfall immediately after application may wash the chemical off the foliage and a repeat treatment may be required. Do not apply if rainfall is forecast for the time of application.

MIXING AND APPLICATION


PRECAUTIONS

ATTENTION: AVOID CONTACT WITH FOLIAGE, GREEN STEMS, OR FRUIT OF CROPS, DESIRABLE PLANTS AND TREES SINCE SEVERE INJURY OR DESTRUCTION MAY RESULT.

APPLY THESE SPRAY SOLUTIONS IN PROPERLY MAINTAINED AND CALIBRATED EQUIPMENT CAPABLE OF DELIVERING DESIRED VOLUMES.

AVOID DRIFT - EXTREME CARE MUST BE USED WHEN APPLYING THIS PRODUCT TO PREVENT INJURING DESIRABLE PLANTS AND CROPS. Do not allow spray mist to drift since even minute quantities of spray can cause severe damage or destruction to nearby crops, plants or other areas on which treatment is not intended, or may cause other unintended consequences. Do not apply when winds are gusty or in excess of 8 km/h or when other conditions, including lesser wind velocities, will allow drift to occur. When spraying, avoid combinations of pressure and nozzle type that will result in fine particles (mist) which are more likely to drift.

DO NOT USE IN GREENHOUSES. REDUCED RESULTS MAY OCCUR IF WATER CONTAINING SOIL IS USED, SUCH AS WATER FROM PONDS AND UNLINED DITCHES.

Clean sprayer and parts immediately after using this product by thoroughly flushing with water. Do not
contaminate water sources by disposal of wastes or cleaning of equipment.

MIXING
For ground sprayers, fill the spray tank with one-half the required amount of water. Add the proper amount of herbicide (see "Weed Control" sections of this booklet) and mix well before adding the remaining portion of water. Placing the filling hose below the surface of the liquid solution will prevent excessive foaming.
Removing hose from tank immediately will avoid back siphoning into water source. Use of mechanical agitators may cause excessive foaming. Bypass lines should terminate at the bottom of the tank.

CROPLAND USES

CROPLAND USES INCLUDE:
In cropping systems before planting of all crops; in minimum tillage systems, post emergent in glyphosate tolerant soybean, canola and corn; preharvest applications in wheat, barley, oats, canola (rapeseed), flax (including low linolenic acid varieties), peas, lentils, dry beans, soybeans and forages.

ALWAYS READ PRECAUTIONARY STATEMENTS, GENERAL INFORMATION and MIXING and APPLICATION PRECAUTIONS PRIOR TO SPECIFIC APPLICATION INFORMATION IN ANY LABEL SECTION.

ANNUAL WEED CONTROL
The following tables provide rates and specific application instructions for control of the annual weeds listed.

ANNUAL WEED CONTROL WITH PREPASS 480 HERBICIDE TANK MIXTURES FOR SUMMERFALLOW & MINIMUM TILLAGE SYSTEMS

Additional Important Information for Annual Weed Control
Allow at least 1 day after treatment before tillage Annual weeds generally will continue to germinate from seed throughout the growing season. Repeat treatments may be necessary to control later germinating weeds, in some situations.
For additional information and precautions, refer to the "General Information" and "Mixing and Application" sections of this label.

WEED CONTROL IN GLYPHOSATE TOLERANT CANOLA


WARNING: APPLY PREPASS 480 HERBICIDE ON GLYPHOSATE TOLERANT CANOLA VARIETIES ONLY.

NOTE: ALWAYS USE PEDIGREED (I.E. CERTIFIED) GLYPHOSATE TOLERANT CANOLA SEED. CANOLA WHICH IS NOT DESIGNATED AS GLYPHOSATE TOLERANT WILL BE DAMAGED OR DESTROYED BY THIS TREATMENT.
For additional information and precautions refer to the “General Information” and “Mixing and Application” sections of the PrePass 480 Herbicide label.
Apply PrePass 480 Herbicide in glyphosate tolerant canola only as directed in the following weed control table.
Some short-term, visual yellowing may occur when PrePass 480 Herbicide is applied at the late application 4 to 6 leaf stage of the crop. This effect is temporary and will not influence crop growth, maturity or yield.
DO NOT APPLY BY AIR
The following table describes the rate and specific application instructions for control of annual and perennial weeds in glyphosate tolerant canola varieties.

PrePass 480 Herbicide plus Lontrel™ 360 Herbicide Tank Mixture
For hard-to-control weeds (see list below) in glyphosate tolerant canola apply a tank mixture of 0.28 L/ha of Lontrel 360 with 0.94 L/ha of PrePass 480 Herbicide in 100L of water per hectare. Apply when canola is in the 2 - 6 leaf stage. Refer to the Lontrel 360 and the PrePass 480 Herbicide labels for lists of other weeds controlled, timing of application, water volumes and use precautions. Apply this tank-mixture in glyphosate tolerant canola only.


WEED CONTROL IN GLYPHOSATE TOLERANT SOYBEAN

WARNING: APPLY PREPASS 480 HERBICIDE ON GLYPHOSATE TOLERANT SOYBEAN VARIETIES ONLY.

NOTE: ALWAYS USE PEDIGREED (CERTIFIED) SOYBEAN SEED DESIGNATED AS GLYPHOSATE TOLERANT. SOYBEANS WHICH ARE NOT DESIGNATED AS GLYPHOSATE TOLERANT WILL BE DAMAGED OR DESTROYED BY THIS TREATMENT.
DO NOT APPLY BY AIR

WEED CONTROL IN GLYPHOSATE TOLERANT CORN

WARNING: APPLY PREPASS 480 HERBICIDE ON GLYPHOSATE TOLERANT CORN VARIETIES ONLY.

NOTE: ALWAY USE PEDIGREED (CERTIFIED) CORN SEED DESIGNATED AS GLYPHOSATE TOLERANT. CORN WHICH IS NOT DESIGNATED AS GLYPHOSATE TOLERANT WILL BE DAMAGED OR DESTROYED BY THIS TREATMENT.
DO NOT APPLY BY AIR.

PERENNIAL WEED CONTROL

ALWAYS READ PRECAUTIONARY STATEMENTS, GENERAL INFORMATION and MIXING and APPLICATION SECTIONS PRIOR TO SPECIFIC APPLICATION INFORMATION IN ANY LABEL SECTION.
When applied as recommended under the conditions described, this product will control the perennial weeds
listed in the following table:
PERENNIAL WEED CONTROL WITH PREPASS 480 HERBICIDE

SPECIAL NOTES FOR PERENNIAL WEED CONTROL

QUACKGRASS

For season-long control on fall tilled ground: Apply 1.88L/ha of this product in spring prior to seeding.
Apply in 50 to 100 L/ha of clean water as described in the preceding table. Delay application until the majority of quackgrass plants have 4-5 green leaves. This stage usually occurs 1 to 4 weeks later on fall tilled ground than on undisturbed ground. Reduced control may result on ground tilled deeper than 15 cm.
If a frost has occurred, wait several days to determine if the quackgrass has recovered. Quackgrass can be treated after a mild frost provided there are 3 to 4 green leaves actively growing at the time of application.
Do not apply after the first damaging frost in the fall.
Surfactant Information:
The following is a list of approved surfactants for use with PrePass 480 Herbicide for control of quackgrass: Agral 90, Companion, Ag Surf
Always refer to surfactant label for specific instructions regarding use of that product.

CANADA THISTLE

Control of Canada thistle at the rosette stage: To ensure the proper timing of application the following steps must be followed:
1. Conduct summerfallow tillage as usual and perform the last tillage operation between July 15th and August 1.
2. Allow the thistles to regrow for a minimum of 5 weeks until they are a minimum of 15cm in diameter and in the rosette stage of growth.
NOTE: Canada thistle can be treated after a mild frost provided the leaves are still green and actively growing at the time of application. Do not apply after the first damaging frost in the fall.

TOADFLAX
Control of Toadflax in a Summerfallow Vegetative Stage
To ensure the proper timing of application, the following steps must be followed:
1. Conduct summerfallow tillage as usual and perform the last tillage operation between July 10-21.
2. Allow toadflax to regrow for a minimum of 4-5 weeks until they are minimum of 15 cm tall and at a lush green vegetative stage.
Note: Toadflax can be treated after a mild frost provided the leaves are still green and actively growing at the time of application. Do not apply after the first damaging frost.

DANDELION
Applications should be made up to and including bloom for best results. Follow-up control measures should be used to manage new dandelions germinating from seed to maintain control throughout the season.

ALFALFA CONTROL WITH 2,4-D TANK-MIX:
The addition of 2,4-D may improve alfalfa control in situations where control may be more difficult to obtain, such as in minimum tillage systems where populations are heavy, and with spring applications.
For fall control of established stands of alfalfa, apply 1.88 – 3.75 L/ha PrePass 480 Herbicide– and 1.2 – 2.4 L/ha of any 500 g/L 2,4-D amine or low volatile ester formulation in 100 – 200 L water/ha. (Adjust product rates accordingly for other 2,4-D formulations).
For spring applications, use only the low rate of 2,4-D (i.e. 1.2 L/ha) and 1.88 – 3.75 L/ha PrePass 480 Herbicide. Only cereal crops not underseeded to legumes may be planted following spring applications of this tank-mix, and a 14 day interval between application and planting is required.
Use the higher PrePass 480 Herbicide rates when perennial grasses are prevalent.

ALL PERENNIAL WEEDS
Weed Stages: Weeds must be at the proper stage for effective control. Refer to "Perennial Weed Control with PrePass 480 Herbicide "
Nozzle Type: For best results with conventional boom equipment apply this product with 50 to 300 L/ha of clean water using flat fan nozzles and no more pressure than 275 kPa.
Rhizome Dormancy: Reduced control may result if rhizomes have become dormant. Dormancy may occur if soil fertility is low and/or the land has not been tilled for several years.
Mowing Effects: Mowing prior to application will reduce effectiveness unless weeds are allowed to regrow to the proper stage before application.
Tillage Effects: Fall or spring tillage prior to spring applications and tillage between harvesting and fall applications will reduce the effectiveness on perennial weeds. Follow-up tillage after application should be delayed 5-7 days for best results (see Weed Control Table for specific tillage interval for each weed).
Rainfall Effects: Heavy rainfall immediately after application may wash the chemical off the foliage and a repeat treatment may be required. Do not apply if rainfall is forecast for the time of application.
Regrowth from Germinating Seeds: This product only controls emerged plants. Repeat treatments or other weed control measures may be required to control weeds regenerating from seeds or other underground parts.
Frost Effects: Heavy frosts prior to application may reduce control. Do not apply after the first damaging frost in the fall.

CROPLAND SITUATIONS

ALWAYS READ PRECAUTIONARY STATEMENTS, GENERAL INFORMATION and MIXING and APPLICATION SECTIONS PRIOR TO SPECIFIC APPLICATION INFORMATION IN ANY LABEL SECTION.
This product can be applied as a broadcast spray or spot treatment prior to planting all crops, post harvest to annual crops, preharvest in wheat, barley, oats, canola (rapeseed), flax (including low linolenic acid varieties),
lentils, peas, soybeans, dry beans and forages, and in summerfallow. It may also be applied as a broadcast spray in glyphosate tolerant canola, soybean or corn (refer to sections on Weed Control in Glyphosate Tolerant Canola, Soybean or Corn). For specific instructions on weed control in the following cropping situations, always refer to the Annual and Perennial Weed Control sections for more information.
Prior to Planting - All Crops
This product may be applied prior to planting all crops for control of emerged weeds listed on this label.
Ensure weeds are at the desired stage at the time of application. This product does not provide preemergent weed control and newly germinating weeds may be a problem in the crop. APPLY BEFORE SEEDING OR TRANSPLANTING.
Post Harvest Stubble Treatment
This product may be applied in the fall as a postharvest stubble treatment for control of perennial weeds such as quackgrass and Canada thistle. Allow weeds to regrow to the desired stage (20-25 cm tall for quackgrass and Canada thistle) before application and ensure they have a high proportion of green coloration. Straw should be removed or evenly spread to allow for proper regrowth and spray coverage. Heavy frosts prior to application may decrease control.
Spot Treatment (In-Crop)
This product can be applied as an in-crop spot treatment in barley, corn, oats, soybeans, wheat, forage grasses and legumes including seed production. Applications should be made using the same rates and at the same growth stages as listed in the weed control tables or use a 0.75% solution for annual weeds and quackgrass and a 1.5% solution for other perennial weeds (a 0.75% solution equals 0.75 litre PrePass 480 Herbicide in 100 litres of spray solution). The 0.75 or 1.5 per cent solutions should be applied to wet, but not run-off. Applications can be made using a boom sprayer, hose and handgun, or hand sprayer in accordance with instructions in the "Application Equipment" section.
Grazing Restrictions
Applications can be made up to heading of small grains, initial pod set on soy and dry beans, silking of corn and emergence of seed heads. The crop in the treated area will be killed. Take care to avoid drift for the same reason. DO NOT APPLY IF CROP GROWTH HAS ADVANCED BEYOND SEED SET. ALLOW 3 TO 5 DAYS FOR PREPASS 480 HERBICIDE TO TRANSLOCATE INTO ALL PLANT PARTS BEFORE GRAZING OR HARVESTING TREATED AREAS IN FORAGES.
Summerfallow Treatment
This product, or labelled tank mixtures, may be applied in summerfallow to control weeds listed on this label.
Ensure weeds are at the desired growth stage and actively growing at application for best results. Reduced
control may result if weeds are drought stressed. Weeds will continue to germinate from seed throughout the
growing season. Repeat treatments may be necessary to control later germinating weeds.
Minimum and Zero Tillage Cropping Systems (All Field Crops, including cereals, oilseeds, pulses, forages, corn and potatoes)
This product may be applied prior to seeding or after seeding, but before crop emergence for control of
emerged weeds in minimum and zero tillage cropping systems for all field crops. Applications made too far in
advance of seeding may allow weeds to emerge between application and crop emergence, as this product
does not provide residual weed control.
Forage Legumes and Grasses
This product may be applied for control of emerged weeds prior to emergence of forage legumes and grasses. If the forages are to be under-seeded with a cover crop, this product must be applied prior to planting the cover crop.
Forage Seed Production
For spot treatment control of perennial weed problems such as quackgrass and Canada thistle in seed fields, apply as directed to vegetation that is at least 20 to 25 cm in height but before emergence of seed head. The crop in the treated areas will be killed. Take care to avoid drift outside target area for the same reason.

PRE-HARVEST CONTROL OF QUACKGRASS, CANADA THISTLE, MILKWEED, TOADFLAX and DANDELION; SEASON-LONG CONTROL OF PERENNIAL SOW THISTLE, AND HARVEST MANAGEMENT
For control of quackgrass, Canada thistle, common milkweed, toadflax and dandelion; and season-long control of perennial sow thistle, PrePass 480 Herbicide can be applied prior to harvest of wheat, barley (including malting barley), oats, canola (rapeseed), flax (including low linolenic acid varieties), lentils, peas, dry beans, soybeans and forages. DO NOT apply to crops if grown for seed production.
This treatment may also provide harvest management benefits, by drying down crop and weed vegetative growth, for example, where late flushes of annual weeds, green vegetative crop growth, or late tillering may interfere with harvest operations. EXTREMELY COOL, WET AND/OR CLOUDY WEATHER CONDITIONS BETWEEN THE TIME OF APPLICATION AND THE ANTICIPATED HARVEST DATE MAY SLOW DOWN ACTIVITY OF THIS PRODUCT, THEREBY DELAYING CROP DRYDOWN AND HARVEST DATE.
PrePass 480 Herbicide should be applied pre-harvest at 1.88 L/ha in 50 to 100 L/ha of clean water, by ground application only. Apply only when the crop has 30% or less grain moisture content. This stage typically occurs 7 to 14 days before harvest. For forage crops, apply this product at 1.88 – 3.75 L/ha 3-7 days prior to the last cut before rotation or forage renovation. Consult the table "Guidelines for Timing of Preharvest Applications" for visual indicators of this stage in each crop. For the best weed control results quackgrass should be actively growing and have at least 4 to 5 green leaves. Canada thistle and perennial sow thistle should be actively growing and at or beyond the bud stage for best results. Common milkweed should be at the bud to bloom stage and actively growing for best results. Applications for weed control (not for harvest management) must be made at the correct stage of both weed and crop growth.
Apply only during the period 7-14 days (or 3-7 days for forage applications) before harvest to ensure best weed control and to maximize harvest management benefits. Earlier application may reduce crop yield and/or quality, and may lead to excess glyphosate residues in the crop.
Do not expose or contaminate any body of water or non-target vegetation by direct application, spray drift, or when cleaning and rinsing spray equipment.

DO NOT APPLY BY AIRCRAFT

RESISTANCE MANAGEMENT RECOMMENDATIONS
For resistance management, PrePass 480 Herbicide is a Group 9 herbicide. Any weed population may contain or develop plants naturally resistant to PrePass 480 Herbicide and other Group 9 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 PrePass 480 Herbicide or other Group 9 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.

Effective
Crops
Glyphosate
BBCH
0 - 0
Registred norm
0.56 - 2.63
Preharvest Interval
-
Crops
Canola
BBCH
0 - 0
Registred norm
0.6 - 1.4
Preharvest Interval
-
Crops
Soybeans
BBCH
0 - 0
Registred norm
1.88 - 3.75
Preharvest Interval
-
Crops
Corn, maize
BBCH
0 - 0
Registred norm
1.88 - 1.88
Preharvest Interval
-
Effective
Barnyard grass
Barnyard grass
Echinochloa crus galli
Black bindweed
Black bindweed
Fallopia convolvulus
Brome grass
Brome grass
Bromus inermis
Canada blue grass
Canada blue grass
Poa compressa
Canada thistle
Canada thistle
Cirsium arvense
Cattails
Cattails
Typha latifolia
Cleavers
Cleavers
Galium aparine
Cocklebur
Cocklebur
Xanthium strumarium
Common chickweed
Common chickweed
Stellaria media
Common dandelion
Common dandelion
Taraxacum officinale
Common hempnettle
Common hempnettle
Galeopsis tetrahit
Common milkweed
Common milkweed
Asclepias syriaca
Common ragweed
Common ragweed
Ambrosia artemisiifolia
Corn spurrey
Corn spurrey
Spergula arvensis
Cottontop
Cottontop
Digitaria californica
Cow cockle
Cow cockle
Vaccaria hispanica
Crabgrass
Crabgrass
Digitaria ischaemum
Curly dock
Curly dock
Rumex crispus
Downy brome
Downy brome
Bromus tectorum
Eastern black nightshade
Eastern black nightshade
Solanum ptychanthum
European bindweed
European bindweed
Convolvulus arvensis
Fall panicum
Fall panicum
Panicum dichotomiflorum
Fat hen
Fat hen
Chenopodium album
Fleabane
Fleabane
Conyza canadensis
Flixweed
Flixweed
Descurainia sophia
Foxtail
Foxtail
Setaria faberi
Foxtail barley
Foxtail barley
Hordeum jubatum
Green foxtail
Green foxtail
Setaria viridis
Green smartweed
Green smartweed
Polygonum scabrum
Hemp dogbane
Hemp dogbane
Apocynum cannabinum
Hoary cress
Hoary cress
Lepidium draba
Japanese knotweed
Japanese knotweed
Fallopia japonica
Jimson weed
Jimson weed
Datura stramonium
Kochia
Kochia
Bassia scoparia
Lucerne
Lucerne
Medicago sativa
Narrowleaf hawksbeard
Narrowleaf hawksbeard
Crepis tectorum
Night flowering catchfly
Night flowering catchfly
Silene noctiflora
Pennsylvania smartweed
Pennsylvania smartweed
Polygonum pensylvanicum
Perennial sow thistle
Perennial sow thistle
Sonchus arvensis
Persian darnel
Persian darnel
Lolium persicum
Poison ivy
Poison ivy
Toxicodendron radicans
Prickly lettuce
Prickly lettuce
Lactuca serriola
Purple loosestrife
Purple loosestrife
Lythrum salicaria
Quackgrass
Quackgrass
Elytrigia repens
Redroot pigweed
Redroot pigweed
Amaranthus retroflexus
Redstem filaree
Redstem filaree
Erodium cicutarium
Round-leaved mallow
Round-leaved mallow
Malva pusilla
Russian thistle
Russian thistle
Salsola kali
Shepherd's purse
Shepherd's purse
Capsella bursa-pastoris
Slim amaranth
Slim amaranth
Amaranthus hybridus
Smooth sowthistle
Smooth sowthistle
Sonchus oleraceus
Tares
Tares
Vicia sativa
Velvetleaf
Velvetleaf
Abutilon theophrasti
Volunteer barley
Volunteer barley
Hordeum vulgare
Volunteer canola
Volunteer canola
Brassica napus
Volunteer corn
Volunteer corn
Zea mays
Volunteer flax
Volunteer flax
Linum usitatissimum
Wild mustard, charlock
Wild mustard, charlock
Sinapis arvensis
Wild oat
Wild oat
Avena fatua
Wild proso millet
Wild proso millet
Panicum miliaceum
Wild tomato
Wild tomato
Solanum lycopersicum
Wirestem muhly
Wirestem muhly
Muhlenbergia frondosa
Wormwood (Absinth)
Wormwood (Absinth)
Artemisia absinthium
Yellow foxtail
Yellow foxtail
Setaria lutescens
Yellow nutsedge
Yellow nutsedge
Cyperus esculentus
Yellow toadflax
Yellow toadflax
Linaria vulgaris