CEREAL GRAIN CROPS - CORN, SORGHUM, AND SUDANGRASS - CHEMIGATION

General Information

GENERAL INFORMATION

BUCTRIL is formulated as an emulsifiable concentrate of octanoic acid ester of bromoxynil containing the equivalent of 2 pounds of bromoxynil per gallon.

BUCTRIL is a selective postemergence herbicide for control of important broadleaf weeds infesting corn (field and pop), sorghum (grain and forage), wheat, barley, oats, rye, triticale, alfalfa (seedling), flax, onions (dry bulb), garlic, mint (established peppermint and spearmint), Conservation Reserve Program (CRP) areas, grasses grown for seed or sod production, non-residential turfgrass, and noncropland and industrial sites. Optimum weed control is obtained when BUCTRIL is applied to actively growing weed seedlings.

BUCTRIL is primarily a contact herbicide, therefore thorough coverage of the weed seedlings is essential for optimum control.

BUCTRIL has little residual activity. Therefore subsequent flushes of weeds will not be controlled by the initial treatment. Generally crops that form a good canopy will help shade subsequent weed flushes. However, certain crops or short-straw varieties, for example Yaccora Rojo wheat, may not develop the crop canopy fast enough to shade the subsequent flushes of weeds.

Occasional transitory leaf burn may occur. The temporary leaf burn is similar to that seen with liquid fertilizer. Because the activity of BUCTRIL is not systemic, recovery of the crop is generally rapid with no lasting effect. Frequency and amount of leaf burn may be greater when crops are stressed by abrasive winds, cool to cold evening temperatures or mechanical injury, such as that caused by hail, sleet or insect feeding. To reduce the potential for temporary leaf burn, applications should be made to dry foliage in the recommended spray volumes per acre when weather conditions are not extreme.

APPLICATION PROCEDURES

BUCTRIL can be applied to registered use areas by ground, aerial and sprinkler irrigation equipment.

GROUND APPLICATION

Use a standard herbicide boom sprayer that provides uniform and accurate application. Sprayer should be equipped with screens no finer than 50 mesh in the nozzle tips and in-line strainers.

Select a spray volume and delivery system that will ensure thorough and uniform spray coverage. For optimum spray distribution and thorough coverage use of flat fan nozzles (maximum tip size 8008) with a spray pressure of 40-60 psi are recommended. Other nozzle types and lower spray pressures that produce coarse spray droplets may not provide adequate coverage of the weeds to ensure optimum control. Raindrop nozzles and flood nozzles are not recommended as weed control with BUCTRIL may be reduced.

In general, a spray volume of 10 to 20 gallons per acre (GPA) is recommended for optimum spray coverage. A minimum of 5 GPA with a minimum spray pressure of 50 psi and a maximum ground speed of 10 mph may be used with higher speed, low volume ground application if ground terrain, crop and weed density allow effective spray distribution. When using higher speed equipment, a maximum ground speed of 10 mph is suggested if field conditions cause excessive boom movement during application which results in poor spray coverage. Ground applications made when dry, dusty field conditions exist may provide reduced weed control in wheel track areas.

Applications using less than 10 gallons per acre may result in reduced weed control.

When weed infestations are heavy, use of higher spray volumes and spray pressure will be helpful in obtaining uniform weed coverage.

When corn or grain sorghum are large enough to interfere with the spray pattern, drop nozzles should be used to obtain uniform weed coverage. If you are unsure of the infestation level or size of crop, consult your local extension service.

Do not apply when winds are gusty or when other conditions favor poor spray coverage and/or off target spray movement.

AERIAL APPLICATION

Use orifice discs, cores and nozzle types and arrangements that will provide for optimum spray distribution and maximum coverage. In general a minimum spray volume of 5 GPA and a maximum pressure of 40 psi are recommended.

Do not apply during inversion conditions, when winds are gusty or when other conditions favor poor spray coverage and/or off target spray movement. Off target spray movement can be minimized by increasing the spray volume per acre and not applying when winds exceed 10 mph.

SPRINKLER IRRIGATION APPLICATION

BUCTRIL Herbicide can be applied through sprinkler irrigation systems to wheat, barley, oats, rye and triticale, field corn, popcorn, and grain sorghum, mint, grasses grown for seed or sod production, garlic, onions (dry bulb) and seedling alfalfa.

Apply BUCTRIL Herbicide through sprinkler systems including center pivot, lateral move, side (wheel) roll, solid set or hand move irrigation systems only. If hand moved pipe is used for chemigation, the pipe must not be handled in any way until 24 hours after chemigation has been completed and residues have been flushed from the system. When applying by chemigation, no person may enter the application site unless in an enclosed vehicle. Do not apply this product through any other type of irrigation system.

CULTIVATION

When properly utilized, timely cultivations of row crops may aid overall weed control efforts as well as crop growth. However, cultivation BEFORE or DURING BUCTRIL applications may place target weeds under stress, resulting in erratic weed control. Whenever BUCTRIL is being utilized in an overall weed control program, plan to postpone any anticipated cultivations until 5-7 days after application to ensure best performance.

CALIFORNIA REGISTRATIONS

Only the following recommendations referenced in the label are registered for use in California: seedling alfalfa, small grains (wheat, barley, oats, rye and triticale), flax, corn (post emergence application only), sorghum (post emergence application only), mint, onions, garlic; chemigation in seedling alfalfa, small grains, onions and garlic; 2,4-D and MCPA tank mixtures in small grains; 2,4-D and atrazine tank mixtures in corn and sorghum; 2,4-DB and Pursuit tank mixtures in seedling alfalfa; grass for seed and sod production, non-residential turfgrass; and non-cropland and industrial sites. All applications must be made with a minimum spray volume of 10 GPA by ground or 5 GPA by air equipment.

Refer in the label regarding tank mix information.

Limitations, Restrictions, and Exceptions

CORN, SORGHUM, AND SUDANGRASS

Apply to corn after emergence but prior to tassel emergence.

Apply to sorghum and sudangrass after emergence but prior to preboot stage (growth stage 4).

Apply through automated sprinkler irrigation systems with a mechanical transfer loading system only. See MIXING, LOADING AND HANDLING INSTRUCTIONS section for complete details.

Apply to MOST SUSCEPTIBLE broadleaf weeds up to the 8 leaf stage or 4 inches in height or 2 inches in diameter, whichever comes first. Apply to SUSCEPTIBLE broadleaf weeds up to the 4 leaf stage, 2 inches in height or 1 inch in diameter, whichever comes first. Do not use chemigation for control of weeds that exceed 4 inches in height because control may be unacceptable.

Weeds Controlled and Suppressed:

When determining leaf stage, count all leaves except cotyledonary leaves.

Canada Thistle: BUCTRIL suppresses the growth by burning down of top growth. Regrowth may occur.

Redroot Pigweed, Spiny Pigweed, Tall Waterhemp: Control of pigweeds in the high plains areas of Texas and Oklahoma may not be satisfactory with BUCTRIL Herbicide. Repeat applications may be necessary to achieve satisfactory control.

Do not apply BUCTRIL at the 2 pints/A rate to sorghum

Pitted Morningglory: Not registered for use in California.

RESTRICTIONS AND PRECAUTIONS

- BUCTRIL does not control grasses. Therefore, it is recommended that a suitable grass control program be used to provide any required grass control.

- Addition of a spray additive or mixture with liquid fertilizers may cause excessive crop leaf burn.

- Seed corn producers should consult the respective seed corn company regarding tolerance of certain seed production inbred lines to BUCTRIL.

- Do not apply BUCTRIL to postemergence to seed corn inbreds or popcorn prior to the 3 leaf stage of crop growth as excessive crop leaf burn may occur.

- Do not plant rotational crops within 30 days following BUCTRIL Herbicide application.

- Do not cut crop for feed, fodder or graze within 45 days of application.

- The total cumulative rate must not exceed 2 pints/A per season.

- Postemergence application prior to the 3 leaf growth stage of corn or sorghum may result in increased crop leaf burn.

- Do not apply BUCTRIL at any rate to sorghum after the preboot stage of growth (growth stage 4) as severe crop injury, including loss of crop yield may result.

- Do not apply the 2 pints/A rate of BUCTRIL to sorghum.

- Follow all restrictions and precautions on the label of all products used in tank mixture with BUCTRIL. For tank mixture recommendations, refer to the label.

Restricted Entry Interval

24 hours