- Author: Guy B Kyser
Silverleaf nightshade (Solanum elaeagnifolium) is a perennial subshrub native to the American Southwest, southern states, Mexico, and South America. It's a member of the Solanaceae, thus a relative of tomatoes, potatoes, tomatillos, eggplant, and tobacco, as well as weeds such as tree tobacco, black nightshade, and hairy nightshade.
The photo below shows silverleaf nightshade spreading in a recently disked field near UC Davis. Note that it's pretty much the only plant present: it can regrow from small rhizome fragments, and is very tolerant of hot and dry conditions. It's also poisonous to livestock. It is a listed noxious weed in many states and in a number of Mediterranean-climate countries...
- Author: Lee Allen
- Posted by: Gale Perez
From the Tree Nut Farm Press :: Feb. 17, 2021
Weed management is important even in offseason
Lee Allen | Feb 17, 2021
It's a never-ending task to keep weeds...
- Posted by: Gale Perez
If you missed this year's California Rice VIRTUAL Field Day, you can view it here.
California Rice Virtual Field Day
The full recording can be viewed here.
HIGHLIGHTED weed science presentations:
- 0:20:59 • Florpyrauxifen-benzyl (Loyant): A New Herbicide for California Rice • Kassim Al-Khatib, CE Specialist, Dept. of Plant Sciences, UC Davis
- 0:37:37 • Weedy Rice Trials and Herbicide Failures in the Field •...
- Author: Margaret Gullette Lloyd
- Re-posted by: Gale Perez
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...
- Author: Richard Smith
- Posted by: Gale Perez
Richard Smith is the Vegetable Crops and Weed Science Farm Advisor in Monterey County, California.
Impatiens Necrotic Spot Virus (INSV) in the Salinas Valley is a tospovirus that is spread primarily by western flower thrips (Frankliniella occidentalis). It has a wide host range of over 600 species of plants, including vegetables such as lettuce, tomatoes and peppers, ornamental such as fuchsias, dahlias and gazanias, and many weeds (see below). In the summer months when INSV is well established, lettuce production fields serve as the primary host of the virus, and thrips fly from infected fields that are being harvested to younger unharvested fields, and in that way, propagate and spread...