From the California Agriculture 75(2):83-89. https://doi.org/10.3733/ca.2021a0011
The invasive annual grasses barb goatgrass (Aegilops triuncialis L.) and medusahead (Elymus caput-medusae L.) are widespread in western states and present management challenges on grasslands. To develop an integrated management strategy for these species, we treated sites in five pastures in Mendocino County, comparing combinations of intensive sheep...
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...
Glyphosate is one of the most commonly used herbicides in orchard crops in California both in terms of treated acres and amount of active ingredient applied. Weed managers are generally familiar with the attributes of glyphosate as a postemergence herbicide. Duke and Powles (2008) published an article in Pest...
From the Topics in Subtropics newsletter (8/26/2020)
Removing Avocado Suckers with Glyphosate
This is not good. You find an avocado tree with sun blotch or it is time to thin the orchard and you remove the offending tree. You know that if you don't remove the sucker, you'll end up with some rootstock growth that just gets in the way of the other trees. Avocado suckers can look like a valued tree until it's time for harvest several years later, and then you are likely to find that it's not the.../h3>
The introduction of a new crop into a landscape brings certain unknowns, including the risk of drift from neighboring crops. Hemp is a new, high-value commodity that is now being produced in many parts of California. The attached document includes photos and descriptions of herbicide damage symptoms on hemp. Plants were sprayed with herbicides that are widely used during the hemp growing season. Materials were selected that are likely to be sprayed on commodities planted near, or adjacent to, a hemp field. The intention is to provide a brief description of herbicide injury expected from specific herbicides or similar modes of action. The final page of the document is a table with the common registered uses of the materials included in...