Exotic Removal

Exotic Removal POLLUTANTS ADDRESSED: Nutrients and Organics, Sediments

DESCRIPTION: The predominant streamside exotic plant species in Arizona are various species of saltcedar (tamarisk).

These trees were introduced originally for erosion control, but they have had undesirable consequences (high water use, deleterious impacts on native species), and their removal is now recommended.

There may be a reduction in water loss through reduced evapotranspiration .

Native plants can provide more natural habitat for native wildlife.

POTENTIAL TREATMENT AREAS: Streamside riparian areas

LOAD REDUCTION MECHANISM: Nutrients/Organics Management- Native plant species that replace exotics will take up nutrients from overland and instream water flows.

Sediment Reduction – Once native plants have replaced the exotic species, their roots will stabilize stream banks, reducing erosion and the production of sediment.

ALTERNATIVE MANAGEMENT MEASURES: Fencing Grazing Management Mulching Pole/Post Planting Seeding

LAND USE CLASSIFICATION: Agricultural lands Grazing lands Disturbed areas Riparian areas in lakes and streams.

PERMITTING REQUIREMENTS: None, unless practice takes place near stream, or wetland. In these cases permits under Section 404 and 401 of the Clean Water Act may be required.

ADDITIONAL BENEFITS: Native plants cover and protect soil.

Contact county regional flood control district.

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Exotic Removal POLLUTANTS ADDRESSED: Nutrients and Organics, Sediments

Level 200: ACTIVE MANAGEMENT LOAD REDUCTION POTENTIAL: LOW

MEDIUM

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4.

5.

Herbicide name.

Rate of application or spray volumes.

Acceptable dates of application.

Mixing instructions (if applicable).

Any special application techniques, timing considerations, or other factors that must be considered to ensure the safest, most effective application of the herbicide.

6. Reference to label instructions.

HIGH

ESTIMATED TIME FOR LOAD REDUCTION: IMMEDIATE

MONTHS2 YEARS

> 2 YEARS

EXPECTED MAINTENANCE: LOW

MEDIUM

For biological treatment methods, plans and specifications will include:

HIGH

1. Kind of biological agent or grazing animal to be used.

2. Timing, duration, and intensity of grazing or browsing.

3. Desired degree of grazing or browsing use for effective control of target species.

4. Maximum allowable degree of use on desirable non-target species.

5. Special precautions or requirements when using insects or plants as control agents.

Riparian Planting Zone: Upland Zone

ESTIMATED COST: LOW

MEDIUM

HIGH

PLANNING AND IMPLEMENTATION: For mechanical treatment methods, plans and specifications will include types of equipment and any modifications necessary to enable the equipment to adequately complete the job.

Also included should be: 1. Dates of treatment Operating instructions.

2. Techniques or procedures to be followed.

For chemical treatment methods, plans and specifications will include:

Photo Courtesy of NEMO

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