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Donaee from Snohomish Wa writes

Crossbow not killing tansy ragwort

I have an infestation of tansy plants in my pasture which I sprayed on a sunny afternoon. 3 days later some of the plants have brown edges but I expected them to be dead and they're still quite green. I am unsure of the age of the crossbow, and I used about 4oz of product for 2 gal of water. What am I doing wrong?

Answer:

When you are treating for tansy plants, it is recommended that you use the herbicide when the plants are actively growing. If they are dormant, Crossbow Herbicide may not be as effective. We would recommend doing repeat applications at least 14 days after the first.

Answer last updated on: 10/10/2014

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