- Author: Gale Perez
**EVENT DATE CHANGE**
Event: Weed Science School 2011
Date: Aug. 30-Sept. 1, 2011 (not Sept. 6-8, 2011 and not Sept. 19-21, 2011)
Location: UC Davis
I visited a couple of almond orchard trials this week and thought I'd share a few photos.
First, I ran across a weed that I haven't encountered before - alkali mallow (Malvella leprosa). This weed is also known as: alkali sida, creeping mallow, dollar weed, ivy-leaf sida, star mallow, white mallow, and whiteweed.
When I first saw the weed emerging in these plots, I thought it was one of the annual mallows commonly found in orchards such as common mallow, bull mallow, little mallow or high mallow (Malva neglecta, M nicaeensis, M. parviflora, and M. sylvestris, respectively). In contrast to those more familiar weeds, alkali mallow is a perennial plant that has a deep and extensive system of...
Yesterday, I attended the Southern San Joaquin Valley Olive Day organized by UC Cooperative Extension orchard systems farm advisor, Elizabeth Fichtner (UCCE Tulare Co). She organized a nice half-day program that included presentations on weeds (from yours truly), olive disease problems, insect pests, irrigation, fertility, and economics. Industry representatives also gave updates on the state of the table olive and olive oil industries. Elizabeth is planning to post most of those presentations on the Tulare Co page (see link above) for those who weren't able to attend the meeting.
My presentation from the meeting are below and included both general orchard weed issues as...
- Author: Gale Perez
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UC Weed Research & Information Center (WeedRIC) :: Phone: (530) 752-1748 :: Fax: (530) 752-4604 :: http://wric.ucdavis.edu
We commonly select for specific weeds in agricultural systems because of the neccessary managment practices. Cultivation, fertilization, irrigation, weed management, etc all can affect the weeds in a given field. Some weeds prosper under high fertility, high disturbance, and regular irrigation and tend to be very common in ag fields. Other species do not do as well in those conditions and are found in roadsides, field margins, or non crop areas.
Similar issues can occur with our selection of ornamental plants. Some plants are values as ornamental plants becasue they are very adaptable and easy to grow, can escape cultivation and become weedy in various ecosystems. Here is a link to an article in a magazine called High...