- Author: Brad Hanson
Happy Halloween!
Today I wanted to follow up on a previous post on the phenonena of enhanced microbial degradation of the residual herbicide simazine in orchards and vineyards. In that post, I described research that we did a few years ago to address faster-than-normal degradation of simazine in citrus orchards.
The results of concurrent study done in raisin vineyards near Parlier was published in the most recent issue of the journal Weed Science. Unfortunately, that journal is not open-access but academic folks can find the article under the citation Abit, Rainbolt, Krutz,...
- Author: Brad Hanson
Last winter, I particpated in a series of seven half-day workshops in California, Oregon, and Washington on herbicide-resistant weeds. These workshops were organized by Kassim Al-Khatib from the Univeristy of California Integrated Pest Management (IPM) Program and had a special focus on glyphosate-resistant weeds in tree and vine crops.
In preparation for these workshops, we wrote a series of extension publications that I wanted to share today. The publications and resulting presentations were prepared by weed scientists from various Universities, Cooperative Extension, and USDA-ARS and included various aspects of herbicide resistance in permanent crops. Even as somone who thinks about herbicide resistance...
- Author: Steve Orloff
Many growers have good intentions when it comes to controlling weeds in seedling alfalfa but often fields end up being treated beyond the optimum window. Proper application timing is critical for successful weed control in seedling alfalfa. Not only do weeds reduce the nutritional quality of the alfalfa and reduce alfalfa vigor, but weeds in seedling alfalfa can affect stand density potentially resulting in reduced alfalfa yield over the life of the stand. When herbicides are applied late, weed control can be improved somewhat by increasing the herbicide rate, but that is costly and often increases the potential for alfalfa injury.
In order to get the “most bang for your buck”, treat seedling alfalfa...
- Author: Gale Perez
Plant Health and Field Testing Assistant Research Scientist
Job Code: MBI 158
Marrone Bio Innovations (MBI) is a global provider of natural products serving the ever expanding agricultural and water markets. Venture backed and headquartered in Davis, California, the company focuses on discovering, developing, and marketing natural pest...
- Author: Douglas J Munier
If glyphosate is no longer effective at controlling perennial johnsongrass, but there is a low cost herbicide which is just as effective on johnsongrass with the same proven safety record, but is only going to be effective for a few years, would you use it? How would you use it?
In Argentina as of 2005, johnsongrass has developed resistance to glyphosate. In several southern U.S. states as of 2007 glyphosate is no longer effective on some johnsongrass.
In California, as of 2012, glyphosate is still effective at controlling perennial johnsongrass. “Glyphosate” is that “low cost...
