Mextrol 450

Registered until
Registration number
Active materials

Use in: Barley, Canary Seed, Corn (field, sweet), Flax (including low linolenic acid varieties), Oats, Rye (fall), Selected seedling and established grasses, Wheat (spring, winter, durum)
Controls: Seedling hard-to-kill annual weeds, including Lady's Thumb, Wild and Tartary Buckwheat

MEXTROL 450 Liquid Herbicide is a selective post-emergence herbicide for the control of important broadleaf weeds in selected field crops. For optimum weed control apply MEXTROL 450 Liquid Herbicide to actively growing weed seedlings. MEXTROL 450 Liquid Herbicide is a contact and systemic herbicide. Thorough coverage of the weed seedlings is essential for optimum control. Do not use in residential areas, which are defined as sites where bystanders may be present during or after spraying, including homes, schools, parks, playgrounds, playing fields and public buildings.
Do not permit lactating dairy animals to graze fields within 7 days after application.
Withdraw meat animals from treated fields at least 3 days before slaughter.
Do not harvest forage or cut hay within 7 days after application. 

For resistance management, MEXTROL 450 Liquid Herbicide is a Group 4 and 6 herbicide. Any weed population may contain or develop plants naturally resistant to MEXTROL 450 Liquid Herbicide and other Group 4 and 6 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 MEXTROL 450 Liquid Herbicide or other Group 4 and 6 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 best results spray when weeds are in the seedling stage. Apply in good growing conditions. Application must be made before the crop shields the weeds.

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 km/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 wingspan or rotorspan.

1. Fill spray tank half full of water.
2. Add the required amount of MEXTROL 450 Liquid Herbicide. Begin agitation.
3. If tank-mixing, add the recommended amount of the tank mix partner product to the spray tank first, agitate, and then add MEXTROL 450 Liquid Herbicide (unless otherwise directed).
4. Complete filling spray tank with water, continue agitation.

MEXTROL 450 Liquid Herbicide is recommended in tank mix with other products. Follow all instructions for mixing, spraying precautions, limitations, crop rotations, application timing, pre-harvest intervals etc. on labels of products tank mixed with MEXTROL 450 Liquid Herbicide.

Refer to specific instructions for each crop. At the 1.25 L/ha rate, a 10 litre container treats 8 hectares (19.8 acres). Wash out spray tank and lines and clean all filters, screens and tips. Select nozzle tips to apply the recommended volume of water per hectare. Flat fan nozzles recommended. DO NOT use flood jet nozzles. Adjust boom height to ensure uniform coverage of weeds. For ground applications, spray at 5-10 km/h. Calibrate sprayer and ensure that all tips are in good condition and spraying the same volume.

Do not apply to any body of water. Avoid drifting of spray onto any body of water or other non-target areas. Specified buffer zones should be observed. Coarse sprays are less likely to drift, therefore, avoid combinations of pressure and nozzle type that will result in fine particles (mist). Do not apply during periods of dead calm or when wind velocity and direction pose a risk of spray drift. Do not spray when the wind is blowing towards a nearby sensitive crop, garden, terrestrial habitat (such as shelter-belt) or aquatic habitat.

Surface runoff: 
To reduce runoff from treated areas into aquatic habitats, consider the characteristics and conditions of the site before the treatment. Site characteristics and conditions may lead to runoff include, but are not limited to, heavy rainfall, moderate to steep slope, bare soil, poorly draining soil (e.g. soils that are compacted, fine-textured, or low in organic matter such clay). Avoid applying this product when heavy rain is forecast. Contamination of aquatic areas as a result of runoff may be reduced by including a strip of untreated vegetation (buffer zone) between the treated area and the edge of the water body.

The use of this chemical may result in contamination of groundwater particularly in areas where soils are permeable (e.g. sand, loamy sand and sand loam soils) and/or the depth to the water table is shallow.

Use of the following spray methods or equipment DO NOT require a buffer zone: handheld or backpack sprayer and inter-row hooded sprayer. 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, rangelands, 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.

Generic Aerial Application Label Instructions: 

Directions for Use:
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 marking devices.
Use Precautions: 
Apply only when meteorological conditions at the treatment site allow for complete and even crop 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. Mixer/loader and applicator must be different individuals. Loading of premixed chemicals with a closed system is permitted. Aircraft must be closed cab. No human flaggers are permitted. Aerial applicators must wear long pants and a long sleeved shirt. 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 long-sleeved shirt, long pants, 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, aircraft cockpit and vehicle cabs must be decontaminated regularly.
Product Specific Precautions: 
Read and understand the entire label before opening this product. If you have questions, call the manufacturer at 1-800-868-5444 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:
Apply the recommended rate in a minimum spray volume of 20 litres per hectare. For best results when there is a heavy crop canopy, or when the majority of the weeds are cow cockle, smartweed, hempnettle, pigweed or Canada thistle, a volume of 40 litres per hectare is recommended.

Registered for culturesRatePreharvest Interval
Spring barley1.25 l7
Spring barley1.25 l7
Corn1.25 l15
Winter flax1.25 l60
Spring flax1.25 l60
Spring oats1.25 l7
Winter oats1.25 l7
Winter wheat1.25 l7
Spring wheat1.25 l7
Canary grass1.25 l7
Winter rye1.25 l7
Spring rye1.25 l7