Aquatic Vegetation Herbicide Control Water Use Restrictions1 – number of days after treatment before use in private waters only.
| Human Use | Livestock | Irrigation | ||||
|---|---|---|---|---|---|---|
| Common Name | Drinking | Swimming | Fish | Watering | Turf | Crops |
| bispyribac | 0 | 0 | 0 | 0 | 30 | 30 |
| copper complexes | 0 | 0 | 0 | 0 | 0 | 0 |
| copper sulfate 2 | 0 | 0 | 0 | 0 | 0 | 0 |
| diquat | 1-3 3 | 0 | 0 | 1 | 1-3 3 | 5 |
| endothall 4 | 7-25 | 1 | 0 | 7-25 | 7-25 | 7-25 |
| flumioxazin | 0 | 0 | 0 | 0 | 5 | 5 |
| fluridone 6 | 0 | 0 | 0 | 0 | 7-30 | 7-30 |
| glyphosate 5 | 0 | 0 | 0 | 0 | 0 | 0 |
| imazamox | 0 | 0 | 0 | 0 | 1 | 1 10 |
| imazapyr | *14 | 0 | 0 | 0 | 120 9 | 120 9 |
| penoxsulam | 0 | 0 | 0 | 0 | 0 | *15 |
| SCP | 0 | 0 | 0 | 0 | 0 | 0 |
| triclopyr | *13 | 0 | 0 | 0 | 0 7 | 120 8 |
| 2,4-D | *12 | *12 | *12 | *12 | *12 | *12 |
1 Aquatic vegetation control can result in a period of low dissolved oxygen which can stress and/or kill fish. It is best to treat most aquatic vegetation early in the growing season, when the plant is rapidly growing. Treating small areas (e.g. 1/4) of pond at a time at 10 – 14 day intervals will allow for decomposition usually without causing an oxygen depletion.
2 If water is for drinking, the elemental copper concentration should not exceed 1.0 ppm (i.e. 4.0 ppm copper sulfate)
3 Depending on forumulation – Read label.
4 Length of use restriction for endothall varies with concentration used. Read label.
5 Do not apply within 0.5 mile of a functioning potable water intake.
6 Do not apply within 0.25 mile of a functioning potable water intake.
7 No restriction on irrigating established grasses but do not harvest hay for 14 days after application. Read label.
8 Or until non-detectable concentrations in immunoassay analysis.
* Water restrictions on 2,4-D vary with formulation, rate, and time of year. Read label.
# Minimum setback distances from potable water intakes required and laboratory tests to determine < 0.4ppm for use. Read label.
@ > 1/2 mile from potable water intake
9 Or until < 1.0 ppb
10 Do not use treated water to irrigate greenhouses, nurseries or hydroponics.
11 Sodium carbonate peroxy-hydrate
12 Water restrictions on 2,4-D vary with formulation, location, rate, and time of year. Read label.
13 Minimum setback distances from potable water intakes required and laboratory tests to determine < 0.4 ppm for use. Read label.
14 > 1/2 mile from potable water intake
15 Do not use water from any treated site for food crop irrication until residues are determined to be less than or equal to 1 ppb.
Additional information is available through the following references and websites
Aquatic Vegetation Identification Card Deck $12.00 includes postage. Produced by Dr. Michael P. Masser – Publication Number B6095
contact:
Distribution and Supply, Texas A&M University
PO BOX 1209, Bryan,TX 77806
979-845-6573
or order on-line at:
Texas AgriLife Bookstore: agrilifebookstore.org
