- Author: O. Adewale Osipitan
- Author: Brad Hanson
- Author: Matthew Fatino
- Author: Mohsen Mesgaran
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Branched broomrape (Phelipanche ramosa), a weedy parasitic plant that can cause devastating damage to many economically important wide range of broadleaf crops including tomato, cabbage, potato, eggplant, carrot, pepper, beans, celery, peanut and sunflower has recently re-emerged in fields in Central Valley counties in California. This weed utilizes a modified root, called haustorium, to fuse into a host plant root and extract nutrients and water which can greatly reduce productivity or even kill the host depending on the level of infestation, susceptibility of the host, and environmental conditions. Tomato is highly susceptible to branched broomrape. In the United States, California accounted for over 90% of the 12...
- Author: Thomas Getts
- Posted by: Gale Perez
From the Lassen county Farm Advisor's Update newsletter (Aug. 2020)
Highlighting Two Uncommon Noxious Weeds
Let's keep them uncommon!
There are two species of noxious weeds I want to bring to your attention, as they are not that common in our area: rush skeleton weed (Chondrilla juncea) and sulfur cinquefoil (Potentilla recta). Both of these perennial species have relatively small populations in the Intermountain...
- Author: Thomas Getts
- Author: Rob Wilson
- Posted by: Gale Perez
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...
- Author: Devii R. Rao
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. Nearly 30 years later, it had expanded to more than 60% of the counties in the state. It has a unique growth form that looks like a Christmas tree, though it only grows up to 2.5 feet (O'Dell pers. comm., Brownsey et al. 2013). From a distance it can look like tumbleweed, also known as Russian thistle (Salsola sp.).
Ryan O'Dell is a Natural Resource Specialist with the Bureau of Land Management's (BLM) Central Coast Field Office and Amelia Ryan is a Vegetation Ecologist...
- Posted by: Gale Perez
Mark your calendar...
This field day is open to the public. Please share broadly to those who may be interested in attending.
California Rice Virtual Field Day
When: August 26, 2020, 1:00-3:00 PM
Where: Online Zoom...
