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Weed control, management, ecology, and minutia
by Matthew Thompson
on June 20, 2011 at 8:09 AM
I attended the recent Almond meeting in Merced and agree that it was a very good meeting. The presentations were excellent. Its also good to see such enthusiasm on the part of the presenters, someone's going to have to carry on the spirit after Walt Bentley retires! My question; Are there any weed susceptibility charts that include the newer contact herbicides such as Treevix, Matrix and Venue?
by Brad Hanson
on June 20, 2011 at 11:20 AM
Thanks for your comment. Walt is one of a kind.  
We are planning an update to the weed susceptiblity chart - it has been a little slow in coming due to some more urgent deadlines. We are hoping to do a fairly major overhaul of the underlying database and my goal is to be done by the end of the year. For those that don't know, we have an online susceptiblity chart here:  
Matrix (rimsulfuron) is on that list. In genereal, the other two herbicides you asked about Treevix (saflufenacil) and Venue (pyraflufen) are contact materials that will only control emerged, small broadleaf weeds. They may burn the tops of large established broadleaf weeds and perennial weeds but will probably not provide satisfactory control of those plants.  
On the bright side, both of those herbicides kill plant via a different mechanism than glyphosate and should control some of our important glyphosate-resistant broadleaf weeds.
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