Pests Addressed

Canada Thitsle

A perennial with extensive underground creeping roots – which makes this weed a challenge to control. Canada thistle is a native of Eurasia but was introduced to North America in the late 18th century.

DID YOU KNOW?

1. Biological control - Canada thistle gall-fly or stem-mining weevil feed on foliage

2. Mechanical control – mowing just prior to flowering inhibits spread and seed production. Chemical control is effective for herbicides registered for Canada thistle. Always read and follow label directions.

Identification

Roots:
Deep horizontal and vertical creeping roots which are the primary method of spread.
Leaves:
Rosette leaves are smooth, irregularly lobed, and the leaf margins have spiny teeth.
Stem:
Grows erect, hairless, and hollow in cross-section. Plants can grow up to 1.2 m in height.
Flowers:
Pink, purple, or white flowers arranged in clusters and smaller than others in the thistle family. Plants are either male or female, but only female flowers can produce seed.
Seeds:
Single tan-colored seeds with a slight curve; each seed has a feathery pappus to disperse via wind.

Products to Use

Call (866) 572-8240 to order or visit the Online Store.

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Weed Management: The Herbicides

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