- (Public Value) UCANR: Protecting California's natural resources
Perennial pepperweed (Lepidium latifolium) also known as tall whitetop is a root-creeping perennial weed. It is commonly found along roadsides, ditches, and drains. It is also a big problem in pastures, non-cropland, and even cropland that is not tilled on a yearly basis. Unlike many other weeds of the state, pepperweed is problematic throughout many ecotypes, from low elevation wetlands around the delta up to high elevations in the Sierra's. Perennial pepperweed spreads by seed and root fragments and is very persistent and difficult to control once established.
Up in the Klamath basin, I've been amazed at the number of perennial pepperweed patches flowering along the road and ditches this year. The plants' tiny white...
New information (7/30/2020): California Agricultural Commissioner's offices are collecting seeds locally. Please contact your county office (https://cacasa.org/county/).
In the past few weeks, there has been a rash of reports from citizens in several states (at least 27) regarding packages of seed apparently sent from China, and in some cases, Uzbekistan (1). The...
- Author: Chris McDonald
Wildland herbicide applicators in California have to be licensed or have be supervised in the field by a licensed applicator. The California Department of Pesticide Regulation (DPR) requires all license holders to complete continuing education hours every two years and the amount depends on the license type. Most wildland herbicide applicators have a QAL or QAC license and for those license types DPR requires 20 total hours of CE every two years with at least 4 hours of laws and regulations hours (however please review the DPR website for complete information because there are some exceptions (https://www.cdpr.ca.gov/docs/license/liccert.htm and see here for general...
From the Small and Organic Farm Advisor Blog
Johnsongrass in organics: Mow it?
Yes, mow it! Mowing works to at least prevent seed spread and regular mowing will weaken rhizomes.
Seed establishment has the greatest potential for the establishment and spread of johnsongrass and must be prevented. Therefore, mowing works to at least prevent seed spread. An individual plant can produce 28,000-30,000 seeds and a single inflorescence can measure 1,240 seeds...
Here's UC Cooperative Extension Farm Advisor Scott Oneto showing us how to control yellow starthistle with burning: