- 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...
From the Livestock and Range blog
Did you miss the Weed Management for Small Acreage Workshop? Don't worry! Here's the link to all the presentations: https://youtube.com/playlist?list=PLLjlfxpbNglYGn38KY94aoo6z3pLjo7E4.
- Poisonous Plants
- Yellow Starthistle Control
- Herbicide Resistant Weeds
- Weed ID and Management 101
As of February 20, fiddleneck (Amsinckia spp.) was flowering in Fresno County. Zero rain fell in the city of Fresno during the month of February. By February 27, a date when the temperature reached 79°F in Fresno, the U.S. Drought Monitor had declared most of California's Central Valley to be in Moderate Drought conditions (D1). This status persists despite cooler temperatures and rain in the middle of March (Fig. 1).
Figure 1. March 31, 2020 Drought Monitor showing moderate drought (D1) in the southern San Joaquin Valley, and the western portion of the entire Central Valley through the north coast. In California,...
Many factors make weed management on federal public lands an interesting challenge.
In September I was invited to join one of the Sierra National Forest Rangeland Management Specialists to explore a medusahead infestation in one of the grazing allotments she manages. The infested meadow used to be a homestead, though the only obvious reminder is the cluster of still-productive apple trees in the middle of an otherwise grass-dominated site. Pines and other conifers border the meadow, and a forest road divides the meadow into two parts. The portion uphill of the road is steeper and has more trees interspersed with the herbaceous vegetation, while the downhill portion is a more expansive, gentler sloping meadow. Due to the...
Thanks to the recent hot weather (already surpassing 90 degrees several days in a row), we are starting to see the lush green hills near Fresno transition into gold. The much-needed rain we received this spring could unfortunately create a problem in the coming summer: thick forage growth can quickly turn into fuel for fire season.
So, what does this have to do with weed management?
Before wildfire, weeds can be fuel;after wildfire, weeds can spread.
The main fuels in the valley and foothills are typically grasses. Even non-weedy grass species can be an issue if grazing livestock (and hardworking landscapers) can't keep up with grass growth before summer. Annual grasses are great...