General Information


Chateau SW uses:

- Chateau SWprovides residual control of susceptible weeds in almond, cotton, grape, mint, non-bearing fruit & nut trees, peanut, pistachio and sweet potato.

- Chateau SWprovides additional burndown activity when used as part of a burndown program in almond, cotton, grape, nonbearing fruit & nut trees and peanut.

- Chateau SWcan be applied as part of a fall burndown program for control of susceptible winter annuals.

- Chateau SWcan be applied with a hooded or shielded sprayer, as well as part of a layby application, in cotton for postemergence weed control as well as residual control of susceptible weeds.

- Chateau SWcan be used on farms, orchards and vineyards for non-selective vegetation control to maintain bare ground noncrop areas that must be kept weed free.


- Do not apply this product when weather conditions favor spray drift from treated areas.

- Do not graze treated fields or feed treated forage or hay to livestock.

- When applying by air, observe drift management restrictions and precautions listed under “AERIAL APPLICATION”.

- Do not apply more than 12 oz. of Chateau SW per acre during a single application.

- Do not apply more than 24 oz. of Chateau SW per acre during a single calendar year.

- Do not apply to frozen or snow covered soil.

- Mechanical incorporation into the soil will reduce residual weed control.

- Post directed and layby applications of Chateau SWshould be applied only to healthy growing crops.

- Spray equipment used to apply Chateau SW should not be used to apply other materials to any crop foliage, unless the proper cleanout procedures is followed. See “SPRAYER CLEANUP” for more information.


Preemergence Application (Conventional Tillage) Important: Crop injury may occur from applications made to poorly drained soils and/or applications made under cool, wet conditions. Risk of crop injury can be minimized by using on well drained soils, planting at least 1.5 inches deep, using high quality seed and completely covering seeds with soil prior to preemergence applications. Treated soil that is splashed onto newly emerged crops may result in temporary crop injury.

Moisture is necessary to activate Chateau SW in soil for residual weed control. Dry weather following applications of Chateau SW may reduce effectiveness. However, when adequate moisture is received after dry conditions, Chateau SW will control susceptible germinating weeds. Chateau SW may not control weeds that germinate after application but before an activating rainfall/irrigation or weeds that germinate through cracks resulting from dry soil. When adequate moisture is not received after a Chateau SW application, weed control may be improved by irrigation with at least 1/4 inch of water. If emerged weeds are controlled by cultivation, residual weed control will be reduced.

Burndown Application

For best results, Chateau SW should be applied as part of a burndown program to actively growing weeds. Applying Chateau SW under conditions that do not promote active weed growth will reduce herbicide effectiveness. Do not apply Chateau SW when weeds are under stress due to drought, excessive water, extremes in temperature, disease or low humidity. Weeds under stress tend to become less susceptible to herbicidal action. Chateau SWis most effective when applied under warm sunny conditions. Reduced residual weed control may occur when burndown applications are made to fields where heavy crop and/or weed residue exist.

Postemergence Application

Chateau SW should only be applied to healthy crops labeled for postemergence use. Do not apply Chateau SW to crops that have been weakened by disease, drought, flooding, excessive fertilization, soil salts, previously applied pesticides, nematodes, insects or winter injury.

Soil Characteristics

Application of Chateau SW to soils with high organic matter and/or high clay content may require higher dosages than soils with low organic matter and/or low clay content. Application to cloddy seedbeds can result in reduced weed control.


Residual Weed Control (Including Preemergence Applications or Applications as Part of a Fall or Spring Burndown and Fallow Seedbed Program)

Based upon soil characteristics (organic matter content and texture), the most difficult to control weed species being targeted, and the crop being grown, select the proper Chateau SW dosage from the rate range tables contained in the label.


(Ground Equipment only. See Information for Aerial Equipment under “AERIAL APPLICATION”.)

Preemergence Application (Conventional Tillage)

To ensure uniform coverage, use 10 to 30 gals. of spray solution per acre for conventional-tillage applications. Nozzle selection should meet manufacturer's gallonage and pressure recommendations for preemergence herbicide application.

Burndown Application (Prior to Crop Emergence)

To ensure thorough coverage in burndown applications, use 15 to 50 gals. Spray solution per acre. Use 20 to 50 gals. per acre if dense vegetation or heavy crop residue is present. Nozzle selection should meet manufacturer's gallonage and pressure recommendations for postemergence herbicide application.

Postemergence Application (Emerged Crop)

To ensure thorough coverage in burndown applications, use 15 to 30 gals. Spray solution per acre. Use 20 to 30 gals. per acre if dense vegetation or heavy crop residue is present. Nozzle selection should meet manufacturer's gallonage and pressure recommendations for postemergence herbicide application.


Application equipment should be clean and in good repair. Nozzles should be uniformly spaced on boom and frequently checked for accuracy.


Apply Chateau SW, and Chateau SW tank mixes, with ground equipment using standard commercial sprayers equipped with flat fan or flood nozzles (preemergence applications only) designed to deliver the desired spray pressure and spray volume.


When banding, use proportionately less water and Chateau SW per acre. The rate of Chateau SW required per acre, when applied as a banded application, can be calculated with the formula on the label.


Spray drift away from the site of application may cause damage to non-target vegetation. To minimize drift, apply the largest droplet size consistent with uniform coverage and satisfactory weed control. To obtain satisfactory application and avoid drift, the following directions must be observed:

- Do not apply during low-level inversion conditions, when winds are gusty or under other conditions that favor drift. Do not spray when wind velocity is less than 2 mph or more than 10 mph.

- Do not apply this product by air within 40 ft. of non-target plants including non-target crops.

- Do not apply this product by air within 100 ft. of emerged cotton crops.

- Do not apply this product by air within 40 ft. of streams, wetlands, marshes, ponds, lakes and reservoirs.

- Carrier Volume and Spray Pressure: When used as part of a burndown weed control program, apply Chateau SW in 7 to 10 gals. of water per acre. Application at less than 7 gals. per acre may provide inadequate control. When used for preemergence weed control, apply Chateau SW in 5 to 10 gals. of water per acre. The higher gallonage applications generally afford more consistent weed control. Do not exceed the nozzle manufacturer’s recommended pressures. For many nozzle types, lower pressure produces larger droplets. When higher flow rates are needed, use higher flow rate nozzles instead of increasing pressure.

- Nozzle Selection and Orientation: Formation of very small drops may be minimized by appropriate nozzle selection, by orienting nozzles away from the air stream as much as possible and by avoiding excessive spray pressure. Use nozzles that produce flat or hollow cone spray patterns. Use non-drip type nozzles, such as diaphragm-type nozzles, to avoid unwanted discharge of spray solution. The nozzles must be directed toward the rear of the aircraft, at an angle between 0 and 15° downward. Do not place nozzles on the outer 25% of the wings or rotors.

- Adjuvants and Drift Control Additives: Refer to tank mix partner’s label for adjuvant recommendation. Drift control additives may be used. When a drift control additive is used, read and carefully observe the cautionary statements and all other information appearing on the additive label.

Refer in the specific supplemental label for the Mixing Order Information for Chateau Herbicide + Drift Retardant Tank Mixes.

Refer in the supplemental label regarding the use of chemigation on alfalfa.

Limitations, Restrictions, and Exceptions



- Do not apply more than 2.5 oz. of Chateau SW per acre during a single growing season.

- Do not apply postemergence to sweet potatoes.

- Do not use greenhouse-grown transplants.

- Do not use transplants harvested more than 2 days prior to transplanting.

- Do not use on any sweet potato variety other than “Beauregard”, unless user has tested Chateau SW on other variety and has found crop tolerance to be acceptable.

- Do not apply as a part of any tank mix, except with labeled rates of Command, if tank mix is applied prior to transplanting.


Chateau SW may be applied to sweet potato field 2 to 5 days prior to transplanting sweet potatoes.


Preemergence To Weeds

Apply Chateau SW to soil prior to transplanting sweet potato slips for the preemergence control of the weeds listed in Table 1.

Read tank mix product label for rates and weeds controlled.

Always read and follow label directions for all tank mix products before using. The most restrictive labeling of any tank mix product must be followed. Chateau SW, when applied according to label use directions, will control the weeds listed in Table 1. The label makes no claims concerning control of other weed species.

Restricted Entry Interval

12 hours