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Getting Rid of Tansy
*  Tansy Decimated by the
Cinnabar Moth Larvae -
Small infestations can be
pulled by hand. The roots
must be pulled out for the
plant to die.
*  The large infestations
can be controlled with the
Tansy Flea Beetle, an
introduced biological
control agent, or the
Cinnabar Moth.

Comments from Pam:

We have quite a bit of tansy
on our property. We are
removing the plants this 
fall, but I wanted to wait
until I was able to get some
photos. Also, it was im-
portant to me not to disturb
the larvae feeding on the
plants or destroy the eggs
of the Cinnabar Moth.

Now that the insects have had their way, we will be digging up the plants and spraying roots with and herbicide to prevent and pieces left in the ground from regrowing.



















Continuous monitoring of the pastures is needed in spring and fall to prevent a reinfestation since seeds can lay dormant for about 3 years. Seeds that have fallen will likely germinated and cause new plants.

Here are some photos of plants that are NOT tansy, but can be mistaken for it.













Dandilions and other yellow flowers.

When I was in 4-H we identified tansy by the flowers which generally have 13 petals. Dandelions have many more. Also, the leaves are larger than the plants pictured here.

This article may be reprinted on your web site if you include this entire paragraph when copying it to your site. Copyright 2004 - 2010, Pam Hunter, Hunter's Pony Farm http://www.huntersponyfarm.com

Tansy Ragwort, part 2

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