Arizona Weed ID

AJBB(9b)March 27, 2014

This weed appears to be very common in the Phoenix area, but I've been having problems IDing it. It also seems to be pretty resistant to Roundup.

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ken_adrian Adrian MI cold Z5

nothing is resistant to RU if properly used ...

looks like a thistle to me ... but that is a guess ... as MI is not AZ ....

ken

    Bookmark   March 27, 2014 at 6:30PM
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jekeesl (south-central Arkansas)(7b)

Looks like Arabis missouriensis.

Here is a link that might be useful: Green Rockcress

    Bookmark   March 27, 2014 at 7:32PM
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lycopus(z5 NY)

Glyphosate resistance is well known in a number of species. It is a consequence of widespread use of the herbicide.

    Bookmark   March 27, 2014 at 9:18PM
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Suzi AKA DesertDance Zone 9b

Try boiling hot water on it. Cook it's roots!

The manager at our HD told us to get the cheap Glyphosate that you mix yourself, and mix it stronger than the instructions. The pre-mix is weaker. They want you to buy more.

Good luck!

Suzi

    Bookmark   March 28, 2014 at 11:19AM
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