General Information


Landmaster II herbicide is a postemergence herbicide for control or suppression of emerged weeds in fallow and reduced tillage systems, prior to planting or emergence of barley, field corn, oats, rye, sorghum (grain or forage), or wheat, and as a spot treatment in barley, field corn, forage grasses, forage legumes, oats, rye, sorghum, and wheat.

Do not harvest or feed treated vegetation for 8 weeks after application. Following spot treatment in forage grasses or legumes, allow 30 days before harvesting or grazing domestic livestock.

This product enters the plant through the foliage and moves throughout the plant. Visual effects of control are a gradual wilting or yellowing of the plant that advances to complete browning of above ground growth and deterioration of affected underground plant parts. Visible symptoms will usually develop on weeds listed on the label within 2 to 4 days after application, but may not occur for 7 or more days. Extremely cool or cloudy weather following treatment may slow activity of this product and delay the visual effects of control.

Application Precautions and Restrictions

- Do not plant any crop other than barley, field corn, oats, rye, sorghum (grain or forage), or wheat for 3 months after treatment.

- Application of this product after planting and prior to crop emergence may cause crop injury if rainfall or environmental conditions delay crop emergence.

- This product is recommended for control of emerged weeds prior to establishment of crops listed on the label. Large amounts of green or decaying vegetation left standing or incorporated into the seedbed may enhance the development of disease in newly planted crops. This may result in poor emergence and/or stands, especially under cool and/or wet conditions.

- Observe individual and total maximum application rates of 2,4-D (acid equivalents) listed throughout the label. These maximum rates are for the total amount of 2,4-D applied using this product and any other 2,4-D containing product applied either separately or in a tank-mix with this product.

- Spraying early to control young weeds before dense stands develop, or light cultivation to assist weed decay, will favor preparation of suitable seedbeds.

- In reduced tillage and no-till systems, ensure good seed to soil contact and proper seeding depth.

- Do not feed or forage vegetation from treated areas for 8 weeks following application.


- Application should be made only when there is no hazard from spray drift, as very small quantities of this herbicide spray, which may not be visible, can severely injure susceptible crops or desirable vegetation.

- Movement of this product on soil particles during windstorms may cause damage to susceptible plants that are contacted. This hazard is reduced if rainfall occurs shortly after application.

- Buyer and all users are responsible for all loss or damage in connection with the use or handling of mixtures of this herbicide or other materials that are not expressly recommended in the labeling. Mixing this product with herbicides or other materials not recommended on the label may result in reduced performance. Use of this product in any manner not consistent with the label may result in injury to persons, animals or crops, or other unintended consequences.

Landmaster II herbicide is subject to all state and county regulations for 2,4-D amine.

Mixing Instructions

Landmaster II Herbicide Alone

Fill the spray tank to about 75 percent of the desired volume with clean water. Add the appropriate amount of this product, then complete the filling process while maintaining agitation. Remove the hose from the mix tank immediately after filling to avoid siphoning back into the carrier source. During mixing and application, foaming of the spray solution may occur. To prevent or minimize foam, terminate by-pass and return lines at the tank bottom and/or use an agriculturally approved anti-foam or defoaming agent.

Additional surfactant is not recommended for this formulation.

Ground Application: Apply this product at the appropriate rate as specified on the label in 3 to 10 gallons of water per acre as a broadcast spray. For optimum spray distribution and coverage, use flat fan or low-volume flood nozzles. When using flood nozzles, space them no more than 40 inches apart and ensure double overlap of spray pattern. Refer to the manufacturer’s recommendations for correct pressure and nozzle height above the target canopy. Avoid pressure and nozzles that produce fine droplets or mist. Apply using a nozzle height of no more than 4 feet above the ground or crop canopy.

Use appropriate marking devices to ensure uniform spray coverage and best results from Landmaster II herbicide.

Hand-Held and High-Volume Equipment: (use coarse sprays only): Mix this product in clean water and apply to foliage of vegetation to be controlled. For application made on a spray-to-wet basis, spray coverage should be uniform and complete. Do not spray to the point of runoff. Use a 1-percent solution for field bindweed.

Aerial Application: Apply this product at the appropriate rate as specified on the label in 3 to 5 gallons of water per acre.

The boom length must not exceed 75% of the wingspan or 90% of the rotor blade diameter.

Release spray at the lowest height consistent with efficacy and flight safety. Do not release spray at a height greater than 10 feet above the crop canopy unless a greater height is required for aircraft safety. This requirement does not apply to forestry or rights-of-way applications. When applications are made with a cross-wind, the swath will be displaced downwind. The applicator must compensate for this displacement at the downwind side.

Application Instructions

Timing of Application

Apply this product postemergence to vigorously growing weeds when they have reached the size given in the “APPLICATION RATES AND WEEDS CONTROLLED” section of the label. Application should be delayed until maximum emergence of the target weeds, but before weeds exceed the maximum size indicated. For annual weeds, allow 1 day after treatment before tillage. For field bindweed, allow at least 7 days after treatment before tillage.

Reduced control may result if treatment is made under poor growing conditions such as drought stress, disease or insect damage, or if weeds have been mowed, grazed or cut. Heavy dust on foliage or an overstory canopy covering targeted weeds can also reduce control.

Rainfall or irrigation occurring within 6 hours after application can reduce effectiveness. Heavy rainfall or irrigation within 2 hours after application will wash this product off the foliage and a repeat treatment may be required.

For field bindweed and quackgrass, do not till between harvest and fall application, or in fall or spring prior to spring application.

Refer in the label for the details of Landmaster II Herbicide in tank mix with Atrazine.

Limitations, Restrictions, and Exceptions

Spot Treatment

Application in growing crops must be made prior to heading of small grains and grain sorghum (milo), and prior to the silking of corn. Do not spot treat an area more than once per crop cycle.

For forage grasses and legumes, apply in areas where the movement of domestic livestock can be controlled. Remove domestic livestock before application and wait 30 days after application before grazing livestock or harvesting. Do not apply more than 2.0 pounds of 2,4-D (acid equivalents) per acre per application. No more than one-tenth of any acre may be treated at one time. Do not treat the same area more than once in each growing cycle. If grass is to be cut for hay, Agricultural Use Requirements for the Worker Protection Standard are applicable. For Conservation Reserve Program, consult program rules to determine whether grass or hay may be used. The more restrictive requirements of the program rules or the label must be followed.

Restricted Entry Interval

48 hours