UC Weed Science (weed control, management, ecology, and minutia)

Mick Canevari, Emeritus Farm Advisor and Brent Holtz, Farm Advisor, County Director Weeds have a tremendous capacity to spread within an orchard. The first line of defense is identifying the weeds you need to control, and selecting the best herbicides or cultural practices to control those weeds.

Below is a link to the Nov. 2012 UCCE San Joaquin County newsletter Field Notes. Page 8 has an article by Mick Canevari (Emeritus Farm Advisor) and Brent Holtz (Farm Advisor, County Director) on dormant weed control in tree nut crops. http://cesanjoaquin.ucanr.

Marestail (Conyza canadensis; aka horseweed) and hairy fleabane (C. bonariensis; aka flax leaf fleabane) are serious weed problems in vineyards in Monterey County.

Over the past few years, herbicides with the active ingredient glufosinate (Rely, Rely 200, Rely 280) have become very important in California tree nut orchards and grape vineyards.

It's that time of the year when I try to update the list of herbicides registered for use in California orchard and vineyard crops. The attached version has all the updates that I have been made aware of by my industry reps during the year.