- Information provided by: Karey Windbiel-Rojas
- Posted by: Gale Perez
Whack Out Weeds! and EcoMight-Pro contain glyphosate, bifenthrin and permethrin and CDFA has issued a stop order for use on organic farms in the state of California. The press release is shown below.
STOP USE NOTICE ON ORGANIC PESTICIDE PRODUCTS WHACK OUT WEEDS! and ECOMIGHT-PRO
July 30, 2021 - The California Department of Food and Agriculture's (CDFA) State Organic Program (SOP) is issuing this Stop Use Notice regarding the use of W.O.W. (WHACK OUT WEEDS!) and ECOMIGHT-PRO products manufactured by EcoMight LLC. These products are herbicides that are marketed and labeled as organic.
W.O.W (WHACK OUT WEEDS!) and...
- Author: Valerie Eviner
- Posted by: Gale Perez
Valerie Eviner is a Professor of Ecosystem Management and Restoration in the Department of Plant Sciences at UC Davis.
Himalayan blackberry can be a persistent weed, particularly in riparian settings. A number of conventional herbicide treatments are effective in its control, but in many settings, there is pressure to decrease the use of conventional herbicides and find alternative control methods. To assess whether the organic herbicide ADIOS (sodium chloride) could provide blackberry control, we collaborated with Putah Creek Riparian Reserve to implement the following treatments:
- No spray control
- Conventional...
- Author: Valerie Eviner
- Posted by: Gale Perez
Valerie Eviner is a Professor of Ecosystem Management and Restoration in the Department of Plant Sciences at UC Davis.
Yellow starthistle is a noxious weed common in many areas of California's grasslands, and is often a priority for control, due to its effects on decreased livestock carrying capacity, decreased plant diversity, and interference with recreational uses (reviewed in DiTomaso et al. 2006). A number of conventional herbicides are highly effective in controlling yellow starthistle (DiTomaso et al. 2006, USFS 2014), but in many settings, there is increased pressure to decrease use of conventional herbicides and find alternative control...
- Author: Cheryl A. Wilen
- Posted by: Gale Perez
A few months ago I wrote about starting some tests looking at various postemergence herbicides for non-crop use. This project was initiated due to new ordinances some cities in southern California were considering or adopted that limited the use products containing glyphosate on city owned property. I changed up some of the products from the original test I did and repeated some others.
Some are listed as organic and some are organic but not be organically approved by a certifying agency e.g. OMRI. One is listed as a biopesticide (Fiesta). One is a synthetic pesticide (Finale) that may be a good replacement in certain situations.
- Author: Cheryl A. Wilen
There has been more than the usual number of questions about what I am calling "bio-based" herbicides recently. Arguably, this is coming from news that some school districts and cities specifically calling out the use of glyphosate on the properties they manage. Landscaping departments want to know which of the products available work the best.
To start, please be aware that all of these products are contact herbicides that will not move through the plant. Therefore, they will not be effective if you are trying to get to any underground organ such as the roots, rhizomes, tubers, etc. of any perennial plant. Do not try to make a head to head comparison...