Agrobase Canada
MCPA-K Registration expired
NUFARM - Herbicide
17564

DIRECTIONS FOR USE:
DO NOT enter or allow worker entry into treated areas during the restricted-entry interval (REI) of 12 hours.

RESISTANCE-MANAGEMENT RECOMMENDATIONS: 
For resistance management, MCPA-K liquid herbicide is a Group 4 herbicide. Any weed population may contain or develop plants naturally resistant to MCPA-K liquid 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 MCPA-K liquid 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.
For further information or to report suspected resistance, contact Nufarm Agriculture Inc. at 1-800-868-5444 or at www.nufarm.ca.

USE PRECAUTIONS: 
Avoid spray drift to any desirable vegetation NOT listed on the label as damage may occur. Avoid contamination of ponds, streams, rivers and other water sources. Do not spray during periods of high winds when spray is likely to drift. Coarse sprays are less likely to drift. Do not spray during periods of high temperatures when crops may be under stress, as damage to the crop may occur. 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.

TIMING: 
For best results spray when WEED ARE YOUNG AND ACTIVELY GROWING. Apply in good growing conditions. Application must be made before the crop canopy shields the weeds.

SPRAYER: 
Clean all spray equipment thoroughly before use. Select nozzle tips to apply the recommended volume per hectare. Higher water volumes will reduce the risk of crop injury. Calibrate the sprayer and adjust the boom height to ensure uniform coverage.  Nozzles must be in good condition and spraying the same volume. Flat fan nozzle tips are recommended.

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.

Buffer Zones: 
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.

MIXING: 
Shake this product well before using. Half fill the spray tank with clean water. Add the required amount of product and agitate thoroughly. Fill the tank with clean water and agitate well before use.

NOTE: 
If spray solution has been left standing, agitate thoroughly before use.

USES:
WHEAT, BARLEY, RYE, OATS (not underseeded with legumes): 
Wheat, barley and rye may be sprayed from the full 3-leaf to the early flag leaf (shot blade) stage. DO NOT apply after the flag leaf stage. Oats may be treated from the 2-leaf to the 5-leaf stage. Treatment at the 3 to 4-leaf stage usually combines maximum crop tolerance with maximum weed susceptibility. The recommended safe crop rate for wheat and barley is 1.6 litres of product per hectare. The recommended safe crop rate for oats and rye is 1.3 litres of product per hectare. Higher rates may be needed to control certain weed species. Do not exceed 2.18 L/ha per year. Possible crop injury from these higher rates is usually offset by the increased yield of the cleaner crop. Use 50 or more litres of water per hectare. Spraying with higher volumes of water (100 - 150 litres per hectare) may reduce the risk of crop injury. Do not apply more than one treatment per year.
FALL RYE, WINTER WHEAT: 
Treat in the spring between full tillering and the flag leaf (shot blade) stage. DO NOT apply in the fall. The recommended safe crop rate for winter wheat is 1.5 litres of product per hectare and for fall rye is 1.0 litres of product per hectare. Higher rates may be needed to control certain weed species. Do not exceed 2.18 L/ha per year. Possible crop injury from these higher rates is usually offset by the increased yield of the cleaner crop. Use 50 or more litres of water per hectare. Spraying with higher volumes of water (100 – 150 litres per hectare) may reduce the risk of crop injury. Do not apply more than one treatment per year.
CEREALS UNDERSEEDED WITH LEGUMES: 
Apply when cereals are in the full 3-leaf to the early flag leaf (shot blade) stage and the seedling legumes are between the first and third trifoliate leaf stage and not more than 10 cm tall. Do not exceed 2.18 L/ha per year. Use 100 or more litres of water per hectare. Some injury to the legumes may occur, especially if growing conditions are very favourable. Spraying in the evening and/or using increased volumes of water (150 or more litres per hectare) may reduce the risk of injury. Do not apply more than one treatment per year.
CLOVER: 
DO NOT apply to sweet clover. Use 0.75 L/ha of product per hectare. The recommended safe crop rate is 0.7 litres per hectare. Under favourable growing conditions, do not exceed the recommended safe crop rate. Do not apply more than one treatment per year.
ALFALFA AND BIRD'S-FOOT TREFOIL: 
A tank-mix of MCPA-K liquid herbicide at 90 mls per hectare plus EMBUTOX Liquid Herbicide at 1.25 litres per hectare is recommended. Apply in 150 litres or more water per hectare. Apply when cereals are between the 5-leaf and the early flag leaf stage and the legumes are from the first to the third trifoliate leaf stage. Do not apply more than one treatment per year.
ESTABLISHED ALFALFA (spring growth): 
Treat in the spring when annual weeds start to emerge and the spring growth of alfalfa is less than 2.5 – 5 cm tall. Apply 1.25 litres of MCPA-K liquid herbicide per hectare. DO NOT graze within 7 days of application. There is a possibility that plants poisonous to livestock will appear more palatable and could be grazed more readily after MCPA-K liquid herbicide treatment (e.g. tansy ragwort, water hemlock, poison hemlock, death camas). Suitable precautions should be taken when such plants are present. Livestock should not be allowed to graze the treated area until poisonous plants have been removed, are dead or have resumed a normal growth habit. Do not apply more than two treatments per year, with a minimum retreatment interval of 90 days.
FLAX (do not use on low linolenic acid varieties): 
Apply MCPA-K liquid herbicide from time flax is 5 cm tall and before the bud stage. Apply 0.875 to 2.1 litres of product in 40 to 150 litres of water per hectare. Some delay of maturity in flax should be expected when flax is treated with 1.25 litres or more per hectare of MCPA-K liquid herbicide. Higher water volumes (100 – 150 litres of water per hectare) will help reduce crop injury. Do not apply more than one treatment per year.
CORN (post-emergent): 
For control of broadleaf weeds in corn apply MCPA-K liquid herbicide at up to 1.25 litres per hectare. Rates of 1.25 litres per hectare or more may cause severe injury. MCPA-K liquid herbicide may be applied in 100-150 litres of water per hectare as an overall spray up to the time the corn is 15 cm tall (leaf extended) but before the six-leaf stage. DAMAGE TO THE CORN MAY RESULT IF AN OVERALL SPRAY IS APPLIED BEYOND THIS STAGE. In case of drought, delay spraying until one week following rain. Avoid cultivation for three weeks following spraying. Do not add oil or surfactant. Do not apply more than one treatment per year. When hand-harvesting corn (field & sweet), the Re-entry Interval (REI) and Pre-harvest Interval (PHI) are 15 days.

WEEDS CONTROLLED: (DO NOT exceed the rates given for each specific crop identified in the Uses section)
SUSCEPTIBLE:
Easy-to-kill weeds (2 to 4-leaf stage). Use 0.925 to 1.25 litres per hectare. Use the higher rate for weeds in the bud stage, dry or cold weather or heavy infestations: Bluebur, burdock, cocklebur, common plantain, flixweed, lamb's-quarters, kochia, mustard (ball, hare’s ear, Indian, tumble), prickly lettuce, ragweed (common, false and giant), Russian pigweed, shepherd's-purse, stinkweed, wild radish, wild sunflower.
MORE RESISTANT: 
Harder-to-kill weeds (2 to 4-leaf stage). Use 1.5 to 2.0 litres per Page 9 of 9 hectare. Use the higher rate for weeds in the bud stage, dry or cold weather or heavy infestations. Weeds listed under susceptible plus annual sow thistle, biennial wormwood, curly dock, common purslane, dandelion, field peppergrass, goat’s-beard, hemp-nettle, kochia, mustard (dog and tansy), pigweed (prostrate and redroot), smartweed.
TOP GROWTH CONTROL ONLY: (2 to 4-leaf stage).
SUSCEPTIBLE: 
Use 0.925 to 1.25 litres per hectare. Use the higher rate for larger weeds, dry or cold weather or heavy infestations: Field horsetail, vetch.
MORE RESISTANT: 
Use 1.5 to 2.0 litres per hectare. Use the higher rate for dry or cold weather or heavy infestation: Blue lettuce, Canada thistle, field bindweed, goosefoot, gumweed, hedge bindweed, hoary cress, perennial sow thistle, and Tartary buckwheat.
PERSISTENT PERENNIALS: 
Use 2.1 litres per hectare: Leafy spurge. The higher rates indicated for the control of more resistant weeds and persistent perennials may exceed the safe rate indicated for crops and may cause injury. This injury is often offset by a cleaner crop.
CLEANING OF SPRAYER: 
Thoroughly clean the herbicide sprayer before applying any other chemical on crops which may be damaged (see USE PRECAUTIONS). Wash the outside of the sprayer and drain the tank completely. Remove and clean filters, screens and nozzle tips separately. Fill the sprayer tank with clean water. With the agitator running, flush out the lines and boom, then drain. Fill the sprayer with clean water and for each 100 L add 1 L household ammonia. Operate the pump and agitator for 15 minutes. If possible, let the solution remain in the tank and hoses overnight; recirculate and flush out the lines and boom, then drain. Rinse out twice with clean water, recirculating and draining each time. DO NOT contaminate irrigation or drinking water when cleaning the sprayer.

Effective
Crops
Winter wheat
BBCH
0 - 0
Registred norm
1.5 - 1.5
Preharvest Interval
-
Crops
Spring wheat
BBCH
0 - 0
Registred norm
1.6 - 1.6
Preharvest Interval
-
Crops
Spring barley
BBCH
0 - 0
Registred norm
1.6 - 1.6
Preharvest Interval
-
Crops
Winter barley
BBCH
0 - 0
Registred norm
1.6 - 1.6
Preharvest Interval
-
Crops
Winter rye
BBCH
0 - 0
Registred norm
1.3 - 1.3
Preharvest Interval
-
Crops
Spring rye
BBCH
0 - 0
Registred norm
1.3 - 1.3
Preharvest Interval
-
Crops
Spring oats
BBCH
0 - 0
Registred norm
1.3 - 1.3
Preharvest Interval
-
Crops
Winter oats
BBCH
0 - 0
Registred norm
1.3 - 1.3
Preharvest Interval
-
Crops
Alfalfa, Lucerne
BBCH
0 - 0
Registred norm
1.25 - 1.25
Preharvest Interval
-
Crops
Winter linseed, flax
BBCH
0 - 0
Registred norm
0.875 - 2.1
Preharvest Interval
-
Crops
Spring linseed, flax
BBCH
0 - 0
Registred norm
0.875 - 2.1
Preharvest Interval
-
Crops
Corn, maize
BBCH
0 - 0
Registred norm
1.25 - 1.25
Preharvest Interval
15
Crops
Clover
BBCH
0 - 0
Registred norm
0.75 - 0.75
Preharvest Interval
-
Crops
Alfalfa, Lucerne
BBCH
0 - 0
Registred norm
0.09 - 1.25
Preharvest Interval
-