UC Weed Science (weed control, management, ecology, and minutia)

Last summer, I was called out to view what appeared to be a herbicide drift incidence in a commercial tomato field. The leaves of affected plants were distorted with cupping and twisting that is characteristic of the growth regulator herbicides such as 2,4-D and dicamba (Figure 1).

Here are training videos on Weed Control Techniques. You may see a few familiar faces.

How to Control Mustard with Grazing Summer mustard, sometimes also called short-pod mustard (Hirschfeldia incana) and black mustard (Brassica nigra) are common rangeland weeds on California's Central Coast. Summer mustard seems to be the more common species.

Stinkwort (Dittrichia graveolens) is a very sticky annual weed in the sunflower family with a powerful smell similar to tarweeds (Brownsey et al. 2013). Its first observation in California was in Santa Clara County in 1984.

***** New information (7/30/2020): California Agricultural Commissioner's offices are collecting seeds locally. Please contact your county office (https://cacasa.org/county/).