OcTTain XL

Manufacturer
Dow AgroSciences
Category
Herbicides
Registered until
2024-12-31
Registration number
30077
Active materials
Links

GENERAL INFORMATION
OcTTain XL Herbicide is a selective postemergence herbicide for the control of broadleaf weeds in spring wheat, durum wheat, winter wheat and spring barley (not underseeded to legumes). OcTTain XL Herbicide provides control of hard-to-kill annual broadleaf weeds such as cleavers, wild buckwheat and kochia (including populations resistant to Group 2 herbicides). The components of OcTTain XL Herbicide move within the plant to control exposed and underground plant tissues. It mimics naturally occurring plant hormones which control weeds by disrupting normal plant growth patterns. Symptoms of effect include epinasty (twisting of the stems) and swollen nodes.

GENERAL USE PRECAUTIONS
READ THE ENTIRE LABEL BEFORE USE. FAILURE TO FOLLOW LABEL INSTRUCTIONS MAY RESULT IN ERRATIC WEED CONTROL OR CROP DAMAGE. DO NOT APPLY TO CROPS UNDERSEEDED WITH LEGUMES.

To minimize spray drift to non-target areas

1. Minimize drift by using sufficient spray volume to ensure coverage with ASAE coarse droplet size spray.
2. Keep ground-driven spray booms as low as possible and not exceeding 60 cm above the target surface.
3. Spray when wind is less that 8 km/hr.
4. Do not spray in dead calm near sensitive plants. The “cloud” of suspended droplets may drift onto sensitive plants when the wind comes up. Spray only when wind is blowing away from a sensitive crop, shelterbelt or garden.
Apply only when then potential for drift to areas of human habitation or areas of human activity such as houses, cottages, schools and recreational areas is minimal. Take into consideration wind speed, wind direction, temperature inversions, application equipment and sprayer settings.
Extreme growing conditions such as drought or near freezing temperatures prior to, at and following time of application may reduce weed control and increase the risk of crop injury at all stages of growth.
Wet foliage at the time of application may result in reduced weed control.
Over-application may result in crop injury.
Make only 1 application per year.
Do not apply through any type of irrigation system.

Restricted Entry Interval (REI)

All crops—12-hour REI

Equipment Clean-Up

Equipment used to apply OcTTain XL Herbicide should not be used to apply other pesticides to sensitive crops without thorough cleaning. To avoid subsequent injury to crops other than cereals, all spraying equipment must be thoroughly cleaned both inside and out, as follows:
1. Immediately after spraying, drain. Any contamination on the outside of the spraying equipment should be removed by washing with clean water.
2. Rinse inside of tank with clean water and flush through booms and hoses using at least one tenth of the spray tank volume. Drain tank completely.
3. Add 1 L of household ammonia (containing a minimum of 3 % ammonia) per 100 L of water while filling the tank with clean water. Agitate and then briefly flush the boom and hoses with the cleaning solution. Top up with water making sure the tank is completely full and allow to stand for 15 minutes with agitation. Flush the boom and hoses and drain tank completely.
4. Remove nozzles and screens and clean separately with an ammonia solution (100 mL in 10 L water).
5. Rinse the tank with clean water and flush through the boom and hoses using at least one tenth of the spray tank volume. Drain tank completely.
Note: If it is not possible to drain the tank completely, step 3 must be repeated before going onto step 4.
Caution: Do not use ammonia with chlorine bleach. Using ammonia with chlorine bleach will release a gas with a musty chlorine odour which may cause eye, nose, throat, and lung irritation. Do not clean equipment in an enclosed area.

SENSITIVE PLANTS

Do not apply OcTTain XL Herbicide directly to, or otherwise permit it to come in direct contact with susceptible crops or desirable plants including alfalfa, edible beans, canola, flowers and ornamentals, lentil, lettuce, peas, potatoes, radishes, soybeans, sugar beets, sunflowers, tomatoes or tobacco.

CROP ROTATIONS
Fields previously treated with OcTTain XL Herbicide can be seeded the following year to alfalfa, barley, canola, corn, dry beans, flax, forage grasses, lentils, mustard, oats, peas, potatoes, rye, soybeans, sugar beets, sunflowers and wheat or fields can be summerfallowed.

PRE-HARVEST/GRAZING INTERVALS

Do not permit lactating dairy animals to graze fields within 7 days after application.
Do not harvest forage or cut hay within 30 days after application.
Withdraw meat animals from treated fields at least 3 days before slaughter.
Do not harvest the treated mature crop within 60 days after application.

Tank Mixtures

In some cases, tank mixing a pest control product with another pest control product or a fertilizer can result in biological effects that could include, but are not limited to: reduced pest efficacy or increased host crop injury. The user should contact Dow AgroSciences Canada Inc at 1-800-667-3852 or www.dowagro.ca for information before mixing any pesticide or fertilizer that is not specifically recommended on this label. The user assumes the risk of losses that result from 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
As this product is not registered for the control of pests in aquatic systems, DO NOT use to control aquatic pests.
DO NOT contaminate irrigation or drinking water supplies or aquatic habitats by cleaning of equipment or disposal of wastes.
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) coarse classification. Boom height must be 60 cm or less above the crop or ground.

Aerial application

DO NOT apply during periods of dead calm. Avoid application of this product when winds are gusty. DO NOT apply when wind speed is greater than 16 kh/h at flying height at the site of application. DO NOT apply with spray droplets smaller than the American Society of Agricultural Engineers (ASAE) coarse classification. To reduce drift caused by turbulent wingtip vortices, the nozzle distribution along the spray boom length MUST NOT exceed 65% of the wing or rotorspan.

OcTTain XL HERBICIDE ALONE

Apply OcTTain XL Herbicide in a uniform spray with ground or aerial application equipment (see Application Directions sections) containing 1.1 L/ha of OcTTain XL Herbicide.

Timing of Application

Apply postemergence when weeds are in the seedling stage (2-4 leaf, unless otherwise noted), and actively growing, and when spring wheat, durum wheat and spring barley are in the 4-leaf to flag-leaf stage. Apply to winter wheat in the spring from the 3 tiller stage to just before the flag leaf stage. Application before the 4-leaf stage of wheat and barley may cause severe twisting of leaves and leaf, stem and head deformities which may reduce yield up to 10%. Do not apply later than the flag-leaf stage. Maximum 1 application per year.

Crops Registered

spring wheat
durum wheat
winter wheat
spring barley

Weeds Controlled
bluebur, burdock, canola (volunteer), cleavers (1-8 whorls), clovers (sweet), cocklebur, flixweed, field horsetail*, goat’s-beard, hemp-nettle (2-6 leaf stage), hoary cress*, kochia**, lamb’s-quarters, mustards (except green tansy, dog & grey tansy), plantain, prickly lettuce, ragweed, round-leaved mallow (1-6 Leaf), shepherd’s-purse, stork’s-bill (1-8 leaf), stinkweed, sunflower (annual), vetch, wild buckwheat (1-6 leaf), wild radish,volunteer flax (1-12 cm)

Weeds Suppressed
common chickweed**(up to 8 cm), redroot pigweed, sow-thistle (perennial) *

* Top growth control only.
** Including biotypes resistant to Group 2 herbicides that inhibit the ALS enzyme.

NOTE:
OcTTain XL Herbicide activity is influenced by weather conditions. Optimum activity requires active crop and weed growth. The temperature range for optimum activity is 12C to 24C. Reduced activity will occur when temperatures are below 8C or above 27C. Frost before application (3 days) or shortly after (3 days) may reduce weed control and crop tolerance. Weed control may be reduced during stress conditions, e.g. drought, heat or cold stress, or if weeds have initiated flowering, or if heavy infestations exist.

APPLICATION DIRECTIONS (GROUND AND AERIAL APPLICATIONS)
(1) Ground Application
Using ground equipment, apply OcTTain XL alone or with tank mix partners as a broadcast treatment. Apply OcTTain XL alone at the recommended rates in a spray volume of 30-100 L water/ha. When tank mixing refer to the label of the tank mix partner label for additional instructions, water volumes, precautions and weeds controlled.
(2) Aerial Application
Do not use human flaggers.
Use OcTTain XL alone or tank mixed with a product registered for aerial application as a broadcast treatment. Apply OcTTain XL alone at the recommended rates in a spray volume of 50-100 L water/ha. Apply in a spray volume of 30-50 L water/ha. Refer to the tank mix partner label for additional instructions, precautions and weeds controlled.
Apply only by fixed-wing or rotary aircraft equipment which has been functionally and operationally calibrated for the atmospheric conditions of the area and the application rates and conditions of this label.
Label rates, conditions and precautions are product specific. Read and understand the entire label before opening this product. Apply only at the rate recommended for aerial application on this label. Where no rate for aerial application appears for the specific use, this product cannot be applied by any type of aerial equipment.
Ensure uniform application. To avoid streaked, uneven or overlapped application, use appropriate swath marking devices.

Use Precautions
Apply only when meteorological conditions at the treatment site allow for complete and even coverage. Apply only under conditions of good practice specific to aerial application as outlined in the National Aerial Pesticide Application Manual, developed by the Federal/Provincial/Territorial Committee on Pest Management and Pesticides.

Operator Precautions

Do not allow the pilot to mix chemicals to be loaded onto the aircraft. Loading of premixed chemicals with a closed system is permitted.
It is desirable that the pilot have communication capabilities at each treatment site at the time of application.
The field crew and the mixer/loaders must wear chemical resistant gloves, coveralls and goggles or face shield during mixing/loading, cleanup and repair. Follow the more stringent label precautions in cases where the operator precautions exceed the generic label recommendations on the existing ground boom label.
All personnel on the job site must wash hands and face thoroughly before eating and drinking. Protective clothing should be laundered regularly.

Product Specific Precautions

Read and understand the entire label before opening this product. If you have questions, call the manufacturer at 1-800-667-3852 or obtain technical advice from the distributor or your provincial agricultural representative. Application of this specific product must meet and/or conform to the following:
The interaction of many equipment-and-weather-related factors determine the potential for spray drift. Users are responsible for considering all these factors when making decisions.
The following drift management requirement must be followed to avoid off-target drift movement from aerial applications: Nozzles must always point backward parallel with the air stream and never be pointed downwards more than 45 degrees.

TANK-MIX OF OcTTain XL HERBICIDE WITH 2,4-D ESTER HERBICIDE

To control or suppress the following additional weeds apply a uniform spray containing 1.1 L/ha of OcTTain XL Herbicide and 140 g a.e./ha of 2,4-D ester herbicide (equivalent to 0.2 L/ha of 2,4-D LV 700) in a total spray volume of 50-100 L water/ha for ground application and in a total spray volume of 30-50 L water/ha for aerial application.

Additional Weeds Controlled

blue lettuce*, dandelion**, docks, dog mustard, field bindweed*, field peppergrass, gumweed, hairy galinsoga, hedge bindweed, lady’s-thumb, leafy spurge*, oak-leaved goosefoot, redroot pigweed, Russian thistle, smartweed, tansy mustard, tartary buckwheat, wild buckwheat (1-8 leaf)

Additional Weeds Suppressed
common chickweed*** (up to 8 cm), Canada thistle*, sow-thistle (perennial)*, sow-thistle (annual)

*Top growth control only.
** Spring rosettes.
*** Including biotypes resistant to Group 2 herbicides that inhibit the ALS enzyme.

Mixing Instructions
1. Fill sprayer tank 1/2 full of water.
2. Start sprayer tank agitation.
3. Add the required number of jugs of OcTTain XL Herbicide.
4. If required, Add the required number of jugs of 2,4-D ester herbicide
5. Complete filling the sprayer tank with sufficient water to spray 100 L of spray mixture per hectare.
6. Follow sprayer directions and precautions as outlined above, especially when applying next to sensitive crops (e.g., canola and legumes).
7. Follow sprayer clean-up directions as listed.


TANK MIXES WITH OcTTain XL HERBICIDE FOR ANNUAL GRASS CONTROL

Tank mixtures of OcTTain XL Herbicide with other herbicides will provide control of additional weeds. These tank mixtures, excluding Simplicity, may include the additional 2,4-D ester herbicide if necessary. Read all precautions, minimal interval to harvest and directions for use on the OcTTain XL Herbicide and tank-mix partner labels and follow the more stringent of the two.

Tank-Mix Combinations with OcTTain XL Herbicide for Annual Grass Control

Herbicide Tank-Mix Partner: Liquid Achieve Herbicide

Crops Registered: spring wheat, durum wheat, winter wheat, spring barley
Rate of Herbicide Tank-Mix Partner: 0.5 L/ha
Adjuvant Rate: Turbocharge 0.5 L/100 L of spray volume (0.5% v/v)
Additional Weeds: green foxtail, wild oats

Herbicide Tank-Mix Partner: Everest Solupak 70 DF
Crops Registered:  spring wheat, durum wheat
Rate of Herbicide Tank-Mix Partner: 43 g/ha
Adjuvant Rate: Refer to Everest Solupak 70 DF label
Additional Weeds: green foxtail, wild oats

Herbicide Tank-Mix Partner: Horizon Herbicide Tank-Mix Signal Herbicide Foothills A Herbicide
Crops Registered:  spring wheat, durum wheat
Rate of Herbicide Tank-Mix Partner: 0.23 L/ha
Adjuvant Rate: Score or Foothills B adjuvant or Signal adjuvant 0.8 L/ha (0.8% v/v)
Additional Weeds: green foxtail, wild oats

Herbicide Tank-Mix Partner: Assert 300 SC
Crops Registered:  spring wheat, durum wheat, spring barley
Rate of Herbicide Tank-Mix Partner: 1.3 L/ha or 1.6 L/ha
Adjuvant Rate: Refer to Assert 300 SC label
Additional Weeds: wild oats (1-3 leaf)-1.3 L/ha or wild oats (4 leaf)-1.6 L/ha

Herbicide Tank-Mix Partner: Puma 120 Super
Crops Registered:  spring wheat, durum wheat
Rate of Herbicide Tank-Mix Partner: 385 mL/ha or 770 mL/ha
Adjuvant Rate: None required
Additional Weeds: green foxtail only - 385 mL/ha or green foxtail, wild oats & barnyard grass - 770 mL/ha

Herbicide Tank-Mix Partner: Simplicity
Crops Registered: spring wheat, durum wheat, winter wheat
Rate of Herbicide Tank-Mix Partner: 0.5 L/ha
Adjuvant Rate: None required
Additional Weeds: Barnyard grass (1-5 leaf), Japanese brome (1-6 leaf), Wild oats (up to 4 leaf 2 tiller), Chickweed (up to 10 cm), Red root pigweed (1-8 leaf), Smartweed (1-5 leaf)

NOTE TO USER: READ THE FOLLOWING BEFORE USING THIS PRODUCT FOR THE INDICATED SPECIAL USE APPLICATIONS: The DIRECTIONS FOR USE for this product for the use(s) described below were developed by persons other than Dow AgroSciences Canada Inc. and accepted for registration by Health Canada under the User Requested Minor Use Label Expansion program. Dow AgroSciences Canada Inc. itself makes no representation or warranty with respect to performance (efficacy) and/or crop tolerance (phytotoxicity) claims for this product when used on the crop(s) listed below.
Accordingly, the Buyer and User assume all risks related to performance and crop tolerance arising, and agree to hold Dow AgroSciences Canada Inc. harmless from any claims based on efficacy and/or phytotoxicity in connection with the use(s) described below.

DIRECTIONS FOR USE

SEEDLING AND ESTABLISHED TALL FESCUE GROWN FOR SEED: Make one application per year, as a ground application only, for control of labelled weeds. Apply from the 4 leaf stage to flag leaf stage in a minimum of 100L water/ha. Do not harvest for forage or do not cut hay for forage.

Application rates:
OcTTain XL Herbicide: 1.1 L/ha alone or in tank-mix with 140 g a.e./ha of 2,4-D ester herbicide (equivalent to 0.2 L/ha of 2,4-D LV 700)

CONTROL OF LABELLED WEEDS IN SEEDLING AND ESTABLISHED FORAGE GRASSES GROWN FOR SEED

Creeping Red Fescue
Intermediate Wheat Grass
Crested Wheat Grass
Meadow Brome Grass
Smooth Brome Grass
Timothy
Apply one application per year in a spray volume of 100-200 L/ha to control labelled weeds in seedling (4 leaf to flag leaf) or established forage grasses. Application should be made postemergence when weeds are in the 2-4 leaf stage. Apply in a broadcast spray using a hydraulic boom ground sprayer.

Application rates:
OcTTain XL Herbicide: 1.1 L/ha alone or in tank-mix with 140 g a.e./ha of 2,4-D ester herbicide (equivalent to 0.2 L/ha of 2,4-D LV 700)
Do not harvest for forage or do not cut hay for forage.
Do not harvest treated crop within 60 days after application.

Refer to the main OcTTain XL Herbicide label for additional details and instructions, including preharvest intervals, before using.
READ THE ROTATIONAL CROPPING RESTRICTIONS ON THE FULL LABEL BEFORE USING THIS PRODUCT.

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.

Method of application: Field sprayer

Crop: spring wheat, durum wheat, winter wheat and spring barley (OcTTain XL Herbicide alone or with tank-mix with 140 g a.e./ha 2,4-D ester herbicide)
Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Estuarine/Marine Habitats of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Terrestrial habitat: 1

Method of application: Aerial

Crop: spring wheat, durum wheat, winter wheat and spring barley (OcTTain XL Herbicide alone) (Fixed Wing)
Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Estuarine/Marine Habitats of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Terrestrial habitat: 50

Crop: spring wheat, durum wheat, winter wheat and spring barley (OcTTain XL Herbicide alone) (Rotary Wing)
Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Estuarine/Marine Habitats of Depths:
Less than 1 m: 1
Greater than 1 m: 0 
Terrestrial habitat: 45

Crop: spring wheat, durum wheat, winter wheat and spring barley (OcTTain XL Herbicide with tank-mix with 140 g a.e./ha 2,4-D ester herbicide) (Fixed Wing)
Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 5
Greater than 1 m: 0
Estuarine/Marine Habitats of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Terrestrial habitat: 50

Crop: spring wheat, durum wheat, winter wheat and spring barley (OcTTain XL Herbicide with tank-mix with 140 g a.e./ha 2,4-D ester herbicide) (Rotary Wing)
Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 2
Greater than 1 m: 0
Estuarine/Marine Habitats of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Terrestrial habitat: 45

For tank mixes, consult the labels of the tank-mix partners and observe the largest (most restrictive) buffer zone of the products involved in the tank mixture and apply using the coarsest spray (ASAE) category indicated on the labels for those tank mix partners.

NOTE:
Applicators may recalculate a site-specific buffer zone by combining information on current weather conditions and spray configuration for the following applications: all airblast applications, and for field and aerial applications which specify the following droplet size category wording on the product label: ‘DO NOT apply with spray droplets smaller than the American Society of Agricultural Engineers (ASAE) [Fine or Medium or Coarse] classification.’ To access the Buffer Zone Calculator, please visit the Pest Management Regulatory Agency web site.

RESISTANCE MANAGEMENT RECOMMENDATIONS
For resistance management, Attain OcTTain XL Herbicide is a Group 4 herbicide. Any weed population may contain or develop plants naturally resistant to OcTTain XL Herbicide and other Group 4 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 OcTTain XL Herbicide or other Group 4 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.

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 a 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.

Registered for culturesRatePreharvest Interval
Spring wheat1.1 l60
Winter wheat1.1 l60
Spring barley1.1 l60
Spring barley1.1 l60