A04_SWPA_Approved_Herbicide_List_v1_3_pdf-EPA_Ecorisk_assessment_ID_kkw_6_24_21.pdf

Southwestern Approved Herbicide List

Bare Ground or

ROW

X

X X

X

X

X X X

X

X

X

Trade Name1 Active Ingredient Herbicide Characteristic and Target Vegetation Pesticide Movement

Rating

Wetland/ Aquatic Use

(Yes/No)2

Bare Ground

Only

ROW

Only

4 # Amine 47.3% dimethylamine salt of 2,4-dichlorophenoxyactic

Selective post emergent for broadleaf weeds in desirable grasses and gravel/rock areas.

Moderate Yes

Accord XRT 53.6% glyphosate Non-selective broad spectrum systemic herbicide for control of l/ i l d d d l

Extremely Low No Arsenal

Powerline 27.8% imazapyr Controls a broad-spectrum of troublesome vines and brambles, brush and tree species, and grasses and broadleaf weeds.

High No

Arsenal 27.8% isopropylamine salt of imazapyr

Non-selective control most annual and perennial grass and broadleaf weeds in addition to many brush and vine species. Readily absorbed

High Yes

Cleantraxx 40.3% oxyfluorfen 0.85% penoxsulam

Pre-emergent broadleaf and grass weeds for hard surface/gravel areas. Extremely Low No X

Endurance 65% prodiamine Pre-emergence control of broadleaf weeds and annual grasses, as well as certain woody brush seedlings.

Extremely Low No X

Credit Systemic Extra

41% glyphosate Non-selective. Extremely Low No

Diuron 4L 40.7% diuron Pre-emergence control of broadleaf weeds and annual grasses, as well

Moderate No X

Escort XP 60% metsulfuron methyl Selective post emergent for broadleaf and woody plants in desirable High No X Garlon 3A 44.4% triclopyr (salt) Selective post emergent for broadleaf and woody plants in desirable Moderate No Garlon 4 61.6% triclopyr (ester) Selective post emergent for broadleaf and woody plants in desirable Moderate No

Karmex-DF 80% diuron Long-term non-selective herbicide for control of most annual and

Moderate No Krenite S 41.5% ammonium salt of Selective for woody species. Low No X

Mastiff PGR 48.1% flurprimidol Growth regulator on established trees. Injected into individual trees. Very High No X

Mojave 70 EG 7.78% imazapyr 32.2% diuron

Pre-emergent use for broadleaf weeds and grasses. Can be used near water.

High Moderate No X

Method 240SL 25% potassium salt of aminocyclopyrachlor

Selective pre and post emergent for broadleaf and woody plants, can be used near water. Works best with Esplanade.

Very High No X

Milestone VM 40.6% triisopropanolammonium salt of 2-pyridine carboxylic acid, 4-amino-3,6-dichloro

Selective post emergent broadleaf weed and some woody, no grazing restrictions; good for desirable grasses under power lines.

Low No X

Oust Extra 56.25% sulfometuron methyl

Selective post emergent for woody plants and broadleaf weeds in desirable grasses.

Moderate High No

Oust XP 56.25% sulfometuron h l

Selective broad-spectrum broadleaf weed and grass control. Moderate No Pathfinder II 13.6% triclopyr Selective for basal bark and cut- stump treatments. Low No X

Polaris 27.7% imazapyr Non-selective post emergent all weeds, grasses and woody. Best used i h

High Yes X Profile 2CS 21.8% paclobutrazol Selective post emergent and tree growth regulator for management of shoot growth and the reduction of biomass when trees are pruned.

High No X

Remedy Ultra 60.45% triclopyr (ester) Selective post emergent for woody plants and some broadleaf weeds. Moderate No Rodeo 53.8% glyphosate Non-selective post emergent all weeds, grasses and woody with no soil residual activity. Best used with pre-emergent.

Extremely Low Yes X

Southwestern Power Administration 1 Revised 6/25/2019 cynthia.short Highlight Interim registration review decisions impose risk mitigation measures necessary to protect the environment pending additional assessments including an endangered species assessment.

The pyridines and pyrimidines are a class of herbicides used to control broadleaf weeds, woody brush and aquatic plants in both agricultural and non-agricultural settings that vary among the herbicides. Agricultural use sites include grains, fruits, vegetables and other crops. Non-agricultural use sites include turf, industrial areas, roadsides and other non-agricultural sites.

Upon publication of the Federal Register notice, the IDs will be available in docket numbers EPA-HQ-OPP-2014-0167 (clopyralid), EPA-HQ-OPP-2013-0750 (dithiopyr) and EPA-HQ-OPP-2014-0576 (triclopyr) and the PID will be available for a 60-day public comment period in docket number EPA-HQ-OPP-2013-0740 (picloram) at www.regulations.gov.

Southwestern Approved Herbicide List

Bare Ground or

ROW

X

X X

1 Alternate trade names or generic formulations may be used provided the active ingredient percentage must be the same.

2 Southwestern does not spray herbicides directly on surface water, nor within 15 feet from any water’s edge. Herbicides approved for aquatic use should be used near sensitive water receptors or open water bodies.

Bare Ground

Only X X X X

Pesticide Movement

Rating

Wetland/ Aquatic Use

(Yes/No)2

Bare Ground

Only

ROW

Only

Transline and Milestone Selective application for weeds and woody No X Vastland and Amine Selective application for weeds and woody Yes X

Mojave and Diuron Bare Ground application with existing grasses/weeds No Polaris and Vastland Bare Ground application with existing grasses/weeds Yes

Tordon 22K and Milestone Selective application for weeds and woody No X

Proposed Combinations

Herbicide Characteristic and Target Vegetation Wetland/ Aquatic Use (Yes/no)

ROW

Only

Cleantraxx and Roundup Bare Ground application with existing grasses/weeds No Mojave and Rodeo Bare Ground application with existing grasses/weeds Yes

Sahara DF 62.2% diuron 7.78% imazapyr

Non-selective, pre-emergent. Moderate No

Roundup Pro 41.0% glyphosate Non-selective post emergent broadleaf and woody plants with no soil residual activity. Best used with pre-emergent.

Extremely Low No X

Trade Name1 Active Ingredient Herbicide Characteristic and Target Vegetation

Streamline 39.5% aminocyclopyrachlor 12.6% metsulfuron methyl

Selective post emergent for woody plants. Spot treat only. Very High No X

Topsite 2.5G 0.5% imazapyr 2% diuron

Non-selective. Moderate No X

Winter mix Blend

Stalker – 27.7% isopropylamine salt of imazapyr

Selective post emergent for woody plants in desirable grasses. High No X

Transline 40.9% clopyralid Selective post emergent for broadleaf and woody. Very High No X Vastlan 54.72% triclopyr choline Selective post emergent for broadleaf and woody, has aquatic label

Very High Yes

Vista 26.2% fluroxypyr Selective post emergent for broadleaf, specific for kosha. Moderate No

Tordon 101M 24.4% picloram 39.6% 2,4-D

Selective post emergent for broadleaf and some woody. Works best when mixed with Garlon 4 for better results.Restricted Use.

Very High Moderate No X

Tordon 22K 24.4% picloram Selective post emergent broadleaf weed and some woody, no grazing restrictions; good for desirable grasses under power lines. Restricted

Very High No X

Southwestern Power Administration 2 Revised 6/25/2019 cynthia.short Highlight EPA Finalized Enforceable Mitigation Measures March 18, 2021 Spray Drift and compost mitigation measures for clopyralid and triclopyr cynthia.short Highlight The compost mitigation measures for clopyralid and triclopyr include label language focusing on:

Reducing compost contamination by prohibiting off-site composting of treated plant matter and manure from grazing animals until residues have adequately declined (both clopyralid and triclopyr);

Requiring pasture and turf applicators to notify the property owners/operators of the compost prohibition, and for the applicator to keep a record of this notification for two year (clopyralid only);

Requiring registrants to participate in a stewardship program and provide educational outreach for those affected by herbicide residues in compost (clopyralid only); and, Removal of residential use on turf language from all labels (clopyralid only).

cynthia.short Highlight Proposed Interim Decision (PID) for picloram for public comment. The pyridines and pyrimidines are a class of herbicides used to control broadleaf weeds, woody brush and aquatic plants in both agricultural and non-agricultural settings that vary among the herbicides. Agricultural use sites include grains, fruits, vegetables and other crops. Non-agricultural use sites include turf, industrial areas, roadsides and other non-agricultural sites.

Upon publication of the Federal Register notice, the IDs will be available in docket numbers EPA-HQ-OPP-2014-0167 (clopyralid), EPA-HQ-OPP-2013-0750 (dithiopyr) and EPA-HQ-OPP-2014-0576 (triclopyr) and the PID will be available for a 60-day public comment period in docket number EPA-HQ-OPP-2013-0740 (picloram) at www.regulations.gov.

After reviewing and considering the public comments received on the proposed interim decision for picloram, EPA will proceed with the registration review process and issue the picloram ID.

cynthia.short Highlight cynthia.short Highlight cynthia.short Highlight cynthia.short Highlight cynthia.short Highlight cynthia.short Highlight

Approved Herbicides