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

Posts Tagged: herbicide resistance

What junglerice (Echinochloa colona) genes can tell us about glyphosate resistance in California

Resistant junglerice growing in an almond orchard. Photo courtesy of Marcelo Moretti, UC Davis.

Each of us have the entire blueprint for our bodies contained in every cell, and the same is true of plants. This information is stored in the form of an extremely long molecule known as DNA (in human cells its length is ~6 feet). Studying and...

Posted on Sunday, May 1, 2016 at 8:00 AM

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


March 16, 2016.  Editor's note.  I recently was informed of an error in the chart Lynn included in this post from December 2018.  While Broadworks (ai = mesotrione) herbicide IS registered in several  stonefruit crops, it is...

Tree and Vine crop herbicide registration 031616
Tree and Vine crop herbicide registration 031616

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...

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

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