UCCE Master Gardeners of San Joaquin County
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UCCE Master Gardeners of San Joaquin County

Posts Tagged: herbicide resistance

What is that in my grove, Horseweed or Hairy Fleabane?

Photo 2. (Right) Seedlings of hairy fleabane (top) and, horseweed (bottom). (Photo: Shrestha et al. 2008).

As a farm advisor many growers will ask, “What is that in my grove- horseweed or fleabane?” These two weeds have been running rampant in Southern California, as well as other parts of the state and can be seen in every cropping system...

Posted on Wednesday, January 27, 2016 at 11:45 AM

Mesotrione for weed control in orchards


In California, that have been 26 confirmed instances of weeds resistant to herbicides. Although the majority of resistances (ALS-inhibitors, ACCase-inhibitors, and thiocarbamates) have developed in rice production systems, some of the most recently...

Posted on Friday, December 18, 2015 at 10:06 AM

California Agriculture - Review of herbicide resistant weed issues in CA (and other pest problems)

CalAg 68 4 cover Dec2014

The journal California Agriculture recently published a special issue on research and extension efforts related to the University's Endemic and Invasive Pests and Diseases strategic initiative.  The subtitle of the special issue is: How UC and it's...

CalAg 68 4 cover Dec2014
CalAg 68 4 cover Dec2014

Posted on Thursday, February 5, 2015 at 8:58 AM

WSSA press release and fact sheet about "Superweed" fallacies

Below is a recent press release from the Weed Science Society of America (WSSA) announcing a new fact sheet addressing misconceptions about the so-called "superweeds". I alluded to this few weeks ago in my post "Can herbicide resistance...

Posted on Wednesday, October 8, 2014 at 8:12 AM

Herbicide Resistance Summit II, in Washington DC (and webcast) September 10th

Meeting announcement from the Weed Science Society of America.  Brad To Those Concerned About the Explosion of Herbicide-Resistant Weeds, Attached you will find more information regarding the upcoming 2nd Herbicide Resistance Summit.  In...

Posted on Friday, August 8, 2014 at 8:23 AM

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