- 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: Thomas Getts
I wanted to give a shout-out to a recent blog posted by Tunyalee Martin with UC IPM. The blog post announces a new online interactive tool for controlling wildland weeds with non Chemical methods. This project was spearheaded by Cheryl Wilen (UC IPM) and Jutta Burger (CAL IPC) who worked with a team to develop a Best Management Practices Manual for non-chemical weed control and worked with Tunyalee and UC IPM to build the online interactive interface to access the information.
Click here to read the...
- Author: Steven A Fennimore
Common Purslane Biology
Steve Fennimore, Extension Specialist UC Davis
July appears to be the period of maximum emergence of common purslane (Portulaca oleracea) see figure 1 attached. Purslane is considered a summer weed with peak emergence occurring during warm weather. Purslane seeds are small and germinate best from the soil surface and from very shallow soil layers <0.25 inches. Purslane seed have the lowest level of dormancy during July when we see large flushes of this weed. It is best to cultivate purslane when it is very small – within the first 3 weeks, as uprooting will generally kill the small seedlings. Starting at 4 weeks purslane becomes harder to control. We found that uprooted 4, 5 and...
- Author: Bradley Hanson
Press release (April 28, 2021) from the Weed Science Society of America
Have you heard about HRAC's Mode of Action updates?
The Herbicide Resistance Action Committee (HRAC) has updated its Herbicide Mode of Action Classification System, which is a vital tool in developing sustainable weed control programs.
Explore WSSA's recent fact sheet to find out why updates were needed and what changes are being made.
Good info at the link above including:
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