Max seasonal rate: Apply no more than 4.0 lbs. acid equivalent per acre per use season. Apply no more than 2 treatments per season. Do not make a broadcast application within 30 days of previous broadcast application. Spot treatments are permitted. Use 2 or more gallons of spray solution per acre. Do not use on small canals with a flow rate less than 10 cubic feet per second (CFS) where water will be used for drinking purposes. CFS may be estimated by using the formula below. The approximate velocity needed for the calculation can be determined by observing the length of time that it takes a floating object to travel a defined distance. Divide the distance (ft.) by the time (sec.) to estimate velocity (ft. per sec.). Repeat 3 times and use the average to calculate CFS.
For Ditchbank Weeds: Do not spray cross-stream to opposite bank. Do not allow boom spray to be directed onto water. For Shoreline Weeds: Boom spraying onto water surface must be held to a minimum and allow no more than 2 foot overspray onto water with an average of less than 1 foot overspray to prevent introduction of greater than negligible amounts of chemical into the water.
Do not exceed 4.0 lbs. acid equivalent per surface acre per application.
Do not make a broadcast application within 21 days of previous broadcast application. Spot treatments are permitted. Fish breathe dissolved oxygen in the water and decaying weeds also use oxygen. When treating continuous, dense weed masses, it may be appropriate to treat only part of the infestation at a time. For example, apply the product in lanes separated by untreated strips that can be treated after vegetation in treated lanes has disintegrated. During the growing season, weeds decompose in a 2 to 3 week period following treatment. Waters having limited and less dense weed infestations may not require partial treatments. Other local factors such as water exchange and sediment load can also influence the dissolved oxygen level.
Coordination and approval of local and state authorities may be required, either by letter of agreement or issuance of special permits for aquatic applications.
Water Use:
1. Water for irrigation or sprays:
A. If treated water is intended to be used only for crops or non-crop areas that are labeled for direct treatment with 2,4-D such as pastures, turf or cereal grains, the treated water may be used to irrigate and/or mix sprays for these sites at anytime after the 2,4-D aquatic application.
B. Due to potential phytotoxicity considerations, the following restrictions are applicable: If treated water is intended to be used to irrigate or mix sprays for plants grown in commercial nurseries
and greenhouses; and other plants or crops that are not labeled for direct treatment with 2,4-D, the water must not be used unless one of the following restrictions has been observed:
i. A setback distance from functional water intake(s) of ≥600 ft. was used for the application, or,
ii. A waiting period of 7 days from the time of application has elapsed, or,
iii. An approved assay indicates that the 2,4-D concentration is 100 ppb (0.1 ppm) or less at the water intake. Wait at least 3 days after application before initial sampling at water intake.
2. Drinking water (potable water):
A. Consult with appropriate state or local water authorities before applying this product to public waters. State
or local agencies may require permits. The potable water use restrictions on this label are to ensure that consumption of water by the public is allowed only when the concentration of 2,4-D in the water is less than the MCL (Maximum Contaminant Level) of 70 ppb. Applicators should consider the unique characteristics of the treated waters to assure that 2,4-D concentrations in potable water do not exceed 70 ppb at the time of consumption.
B. For floating and emergent weed applications, the drinking water setback distance from functioning potable water intakes is ≥600 ft.
C. If no setback distance of ≥600 ft. is used for the application, applicators or the authorizing organization must provide a drinking water notification prior to a 2,4-D application to the party responsible for a public water supply or to individual private water users. Notification to the party responsible for a public water
supply or to individual private water users must be done in a manner to assure that the party is aware of a water use restrictions when this product is applied to potable water.
The following is an example of an example of notification via posting, but other methods of notification which convey the above restrictions may be used and may be required in some cases under state or local law or as a condition of a permit.
Example: Posting notification should be located every 250 feet including the shoreline of the treated area and up to 250 feet of shoreline past the application site to include immediate public access points. Posting must include the day and time of application. Posting may be removed if analysis of a sample collected at the intake 3 or more days following application shows that the concentration in the water is less than 70 ppb (100 ppb for irrigation or sprays), or after 7 days following application, whichever occurs first.
Text of notification: Wait 7 days before diverting functioning surface water intakes from the treated aquatic site to use as drinking water, irrigation, or sprays, unless water at functioning drinking water intakes is tested at least 3 days after application and is demonstrated by assay to contain not more than 70 ppb 2,4-D (100 ppb for irrigation or sprays).
Application Date: ______ Time: _____ .
D.
Following each application of this product, treated water must not be used for drinking water unless one of the following restrictions has been observed:
i. A setback distance from functional water intake(s) of ≥600 ft. was used for the application, or,
ii. A waiting period of at least 7 days from the time of application has elapsed, or,
iii. An approved assay indicates that the 2,4-D concentration is 70 ppb (0.07 ppm) or less at the water intake. Sampling for drinking water analysis should occur no sooner than 3 days after 2,4-D application. Analysis of samples must be completed by a laboratory that is certified under the Safe Drinking Water Act to perform drinking water analysis using a currently approved version of analytical Method Number 515, 555, other methods for 2,4-D as may be listed in Title 40CFR, Part 141.24, or
Method Number 4015 (immunoassay of 2,4-D) from U.S. EPA Test Methods for Evaluating Solid Waste SW-846.
E. Note: Existing potable water intakes that are no longer in use, such as those replaced by a connection to a municipal water system or a potable water well, are not considered to be functioning potable water intakes.
F. Drinking water setback distances do not apply to terrestrial applications of 2,4-D adjacent to water bodies with potable water intakes.
3. Swimming (2,4-D butoxyethanol ester only):
A. Do not swim in treated water for a minimum of 24 hours after application.
B. Users must provide the following notification prior to performing a 2,4-D BEE application. Notification to the party responsible for the public swimming area or to individual private users must be done in a manner to assure that the party is aware of the swimming restrictions when this product is applied to water. The following is an example of a notification via posting, but other methods of notification which convey the above restrictions may be used and may be required in some cases under state or local law or as a condition of a permit. Example: Posting notification should be located every 250 feet including the shoreline of the treated area and up to 250 feet of shoreline past the application site to include immediate public access points.
Text of Notification: Do not swim in treated water for a minimum of 24 hours after application. Application Date: ______ Time: _____ .
4. Except as stated above, there are no restrictions on using water from treated areas for swimming, fishing, watering livestock or domestic purposes.
• For EPA chemical numbers, reentry, application method and application equipment: See Aquatic Weed Control (ditchbank application).
AQUATIC WEED CONTROL (Surface application or subsurface injection for submersed weeds) (Amines, salts, acid and butoxyethanol ester only)
| AQUATIC SITES WITH SUBMERSED WEEDS |
Maximum Application
RATE |
Directions and Timing |
| Aquatic weeds in ponds, lakes, reservoirs, marshes, bayous, drainage ditches, canals, rivers and streams that are quiescent or slow moving |
10.8 lbs. acid equivalent per acre foot (see Table 1 below) |
For best results, apply in spring or early summer. A second treatment may be needed when weeds show signs of recovery, but no later than September in most areas. |
| Table 1 |
AMOUNT TO APPLY FOR A TARGET SUBSURFACE CONCENTRATION |
| Surface Area |
Average Depth |
For typical conditions – 2 ppm (2,4-D a.e./acre) |
For difficult conditions – 4 ppm * (2,4-D a.e./acre) |
| 1 acre |
1 ft. |
5.4 lbs. |
10.8 lbs. |
| 2 ft. |
10.8 lbs. |
21.6 lbs. |
| 3 ft. |
16.2 lbs. |
32.4 lbs. |
| 4 ft. |
21.6 lbs. |
43.2 lbs. |
| 5 ft. |
27.0 lbs. |
54.0 lbs. |
* Examples include spot treatments of pioneer colonies of Eurasian Water Milfoil and certain difficult to control aquatic species.