please please help me this weed must be from another planet ,I have goats , and this is taken over my goat field ,,, I CANNOT find after searching for many hours what it is ,,,, I have sprayed it with dichlorophen oxyacetic 2-4-D ,,,, AND the weed laughs at me ,,,,it wont die
Bernalillo County New Mexico
It looks a lot like a species of Artemisia, maybe Artemisia vulgaris - mugwort. or it could be one of the ragworts. The leaves would be whitish on the undersides if it is mugwort. Apparently goats will eat mugwort, but it isn't a favorite food.
Call your local county extension agent about recommended herbicides. Here is a link to an article describing an experiment using different herbicides to control mugwort, http://connection.ebscohost.com/c/articles/40624781/evaluations-selected-herbicides-rates-long-term-..., but you'll need to check which ones are best for New Mexico.