Monterey Thistledown Weed Killer Concentrate — 8 oz clopyralid post‑emergent for thistles & pastures

Monterey Thistledown is an 8 oz concentrated post-emergent herbicide containing clopyralid for selective control of thistles and many broadleaf weeds in pastures, rangeland and other non-crop areas.

Designed for targeted weed management where grasses are desired and broadleaf weeds are not, Monterey Thistledown delivers a concentrated dose of clopyralid to actively growing weeds like Canada thistle, musk thistle and knapweed. It’s formulated for use on ranges, pastures and non-crop areas, with no grazing restrictions, but it is selective — many ornamentals, vegetables and legumes are sensitive and should be avoided.

What weeds does Monterey Thistledown control most effectively?

Thistledown focuses on hard-to-manage broadleaf weeds and thistles that compete with desirable pasture grasses. It is particularly effective on thistle species and several other broadleaf invaders when applied to actively growing plants.

• Controls Canada thistle, musk thistle, star thistle and knapweed.
• Also suppresses kudzu, dandelion and Oxalis in treated areas.
• Works best when weeds are actively growing and not drought-stressed.

How should I apply the 8 oz concentrate safely and effectively?

Mix the product according to the label instructions and apply as a post-emergent foliar spray to actively growing weeds. Take precautions to avoid drift and contact with non-target plants, clothing or skin, and follow all label directions for rates and equipment.

• Measure and dilute precisely per the product label for the target weed and area size.
• Apply when weeds are actively growing for best uptake and control.
• Avoid spraying near ornamentals, vegetables, legumes and irrigation ditches.

Are there animal, grazing or rotational restrictions I need to know?

Monterey Thistledown is labeled for use on ranges, pastures and non-crop areas with no grazing restrictions, so livestock may graze treated areas. However, the product can injure legumes and many desirable broadleaf plants, so plan treatments with pasture composition in mind.

• No grazing restrictions on treated pastures or rangeland are required by the label.
• Leguminous forage plants may be injured or killed by treatment.
• Do not apply where irrigation water may carry product into crop ditches.

What sites and plants should I avoid when using Thistledown?

This concentrate is intended for non-crop areas; most vegetables and ornamental plants are susceptible and should not be exposed. Always avoid drift to desirable species and follow label directions to protect sensitive plants and water sources.

• Do not apply to ornamentals, vegetable gardens or crop areas.
• Avoid use in ditches that contain irrigation water to prevent contamination.
• Keep product away from clothing and skin during mixing and application.

Who this product is for: Monterey Thistledown 8 oz concentrate suits land managers, ranchers and property owners who need a selective, post-emergent herbicide to reduce thistles and persistent broadleaf weeds in pastures, rangeland and other non-crop areas. It’s for users who can follow label directions, protect sensitive plants and equipment from drift, and who require a product with no grazing restrictions but are willing to accept potential damage to legumes and other broadleaf species.