General Information


This product is recommended for selective, postemergence control of
broadleaf weeds in rangeland and permanent grass pastures
(including but not limited to ranchette pastures), and in non-crop land
areas including equipment pathways, industrial manufacturing and
storage sites and rights-of-way such as along roadsides, electrical
lines and railroads. Use on these sites may include application to
grazed areas.


• In Arizona: The state of Arizona has not approved this product for
use on plants grown for agricultural/commercial production, such as
on designated grazing areas.
• In Florida: For control of kudzu in utility rights-of-way, roadsides,
fence lines, and other non-crop areas this product may only be used
in the following counties: Baker, Bay, Bradford, Calhoun, Columbia,
Escambia, Franklin, Gadsden, Gulf, Hamilton, Homes, Jackson,
Jefferson, Lafayette, Leon, Liberty, Madison, Okaloosa, Santa Rosa,
Suwannee, Taylor, Union, Wakulla, Walton, and Washington.
• In New York, the maximum application rate for this product is 2/3
pint per acre per growing season. Do not exceed a cumulative
amount of 2/3 pint of clopyralid per acre per crop year.
• Not for Sale, Use or Distribution in Nassau and Suffolk Counties in
New York State.
• Do not contaminate irrigation ditches or water used for irrigation or
domestic purposes.
• Do not use in greenhouses.
• Chemigation: Do not apply this product through any type of
irrigation system.
• Do not transfer livestock from treated grazing areas to sensitive
broadleaf crop areas without first allowing 7 days of grazing on an
untreated pasture. If livestock are transferred within less than 7 days
of grazing untreated pasture, urine and manure may contain enough
clopyralid to cause injury to sensitive broadleaf plants.

Avoid Injury to Non-target Plants:

This product can affect susceptible broadleaf plants directly through
foliar contact and indirectly by root uptake from soil in treated areas.
Do not allow spray drift to come in contact with vegetables, flowers,
tomatoes, potatoes, beans, lentils, peas, alfalfa, sunflowers, soybeans,
safflower, or other desirable broadleaf crops or ornamental plants or
soil where sensitive crops will be planted the same season.
Do not spray pastures if injury to existing forage legumes or other
desirable broadleaf plants cannot be tolerated. THISTLEDOWN® may
injure or kill legume and certain other broadleaf plants. However, the
stand and growth of established perennial grasses is usually improved
after spraying, especially when rainfall is adequate and grazing is
deferred. Established grasses are tolerant to this product but newly
seeded grasses may be injured until well established as indicated by
tillering, development of a secondary root system, and vigorous

Avoid Movement of Treated Soil: Avoid conditions under which soil
from treated areas may be moved or blown to areas containing
susceptible plants. Wind-blown dust containing clopyralid may produce
visible symptoms, such as epinasty (downward curving or twisting of
leaf petioles or stems) when deposited on susceptible plants; however,
serious injury is unlikely. To minimize potential movement of clopyralid
on wind-blown dust, avoid treatment of powdery dry or light sandy soils
until soil is settle by rainfall or irrigation or irrigate shortly after

Residues in Plants or Manure: Do not use plant residues, including
hay or straw from treated areas, or manure or bedding straw from
animals that have grazed or consumed forage from treated areas for
composting or mulching where susceptible plants may be grown the
following season. Plant materials and/or manure contain enough
clopyralid to cause injury to susceptible plant species. Do not spread
manure from animals that have grazed or consumed forage or hay
from treated areas on land used for growing susceptible broadleaf
corps. To promote herbicidal decomposition, plant residues should be evenly incorporated or burned. Breakdown of clopyralid in crop
residues or manure is more rapid under warm, moist soil conditions
and may be enhanced by supplemental irrigation.
Avoid Spray Drift: Avoid spray drift since very small quantities of the
spray, which may not be visible, may severely injure susceptible
broadleaf plants during active growth or dormant periods. Use coarse
sprays to minimize drift.

Sprayer Clean-Out: To avoid injury to desirable plants, equipment
used to apply this product should be thoroughly cleaned before reusing to apply any other chemicals.
1. Rinse and flush application equipment thoroughly at least 3 times
with water after use. Dispose of rinse water by application to
treatment area or in non-cropland area away from water supplies.
2. During the second rinse, add 1.28 fl. oz. of household ammonia for
every 1 gallon of water. Circulate the solution through the entire
ystem so that all internal surfaces are contacted (15-20 minutes).
Let the solution stand for several hours, preferably overnight.
3. Flush the solution out of the spray tank.
4. Rinse the system twice with clean water, recirculating and draining
each time.
5. Remove nozzles and screens and clean separately.

1. Add ¾ of the required spray volume to the spray tank and start
2. Add the required amount of this product.
3. Agitate during final filling of the spray tank and maintain sufficient
agitation during application to ensure uniformity of the spray
Note: If allowed to stand after mixing, agitate spray mixture before

Limitations, Restrictions, and Exceptions


Application Timing:
For the control of kudzu, apply this product between late June and
early October, as long as the kudzu is actively growing and not under
drought stress. The ideal time to apply this product is during vigorous
growth and just prior to or during flowering. For best results on control
of all other labeled weed species, apply this product when weeds are
small and actively growing. Extreme growing conditions such as
drought or near freezing temperatures prior to, at, and following time of
application may reduce weed control. Only weeds that have emerged
at the time of application will be affected. Wet foliage at the time of
application may decrease control.
The treatment with this product will be rainfast within 2 hours after

Spot Applications:
Hand held sprayers may be used for spot applications of this product.
When applied as a spot treatment, apply to weeds on a spray-to-wet
basis (not to runoff). Contact with foliage of cottonwood/poplar trees
should be avoided or limited to lower branches. Application rates in the
following table are based on an area of 1,000 sq. ft. Mix the amount of
this product (fl. oz. or mL) corresponding to the desired rate of one or
more gallons of spray. To calculate the amount of this product required
for larger areas, multiply the table value (fl. oz. or mL) by the area to be
treated in “thousands” of square feet. For example, if the area to be
treated is 3,500 sq. ft., multiply the table value by 3.5 (calculation:
3,500 divided by 1,000 = 3.5).

Use Precaution and Restriction: Do not use in forest nursery beds.

The material and content contained in the Greenbook label database is for general use information only. Agworld and Greenbook do not provide any guarantee or assurance that the information obtained through this service is accurate, current or correct, and are therefore not liable for any loss resulting, directly or indirectly, from reliance upon this service. This label database does not replace the official manufacture issued label. Users of this database must read and follow the actual product label affixed to the container before use of the product.