- Author: Brad Hanson
Kassim Al-Khatib, Director of the UC-Statewide Integrated Pest Management (UC-IPM) Program, sent a couple links about the identification of Palmer amaranth and comparison to other amaranth (pigweed) species. I thought they were useful and potentially of interest to California weed managers so I thought I'd share:
In this first link, Dr Bill Johnson and Travis Legleiter, weed scientists from Purdue University have a video explanation for helping growers identify Palmer amaranth and explain differences between other related species in Indiana (click here for...
- Author: WSSA
- re-poster: Brad Hanson
A quick repost this morning of a recent Weed Science Society of America (WSSA) press release about online databases and smartphone apps for tracking invasive weeds.
Technology that allows integration GPS coordinates and automated (or semi-automated) managment of huge, constantly changing datasets is evolving quickly. The ability for non-technical weed managers to use smartphones to monitor and even help map the location and movement of invasive weeds may allow new opportunities to identify invasions while they are small which can significantly increase the chances for successful eradiction or economical management. Pretty cool stuff!
- Author: Brad Hanson
The Spring 2012 edition of the Sacramento Valley Walnut News was recently made available at the Sutter-Yuba Cooperative Extension office. It's available here and is attached at the bottom of this post.
Topics in this edition include:
- Walnut Blight Management (Buchner and Lindlow)
- Training and Pruning Young Walnut Trees (DeBuse, Hasey, Lampinen)
- Description of the Three Training/Pruning Styles Compared in the Chandler Hedgerow Trial (DeBuse, Hasey, Lampinen)
- Tools for Weed Management Decisions in Orchard Crops...
- Posted By: Brad Hanson
- Written by: WSSA press release
Weeds can be introduced to new areas from a variety of natural and human-influenced sources. Seed transport on vehicles or equipment can be a very important mechanism of spread.
The WSSA article below focuses on transport of invasive weed seed on recreational and work vehicles in rangeland areas but the same concepts hold true in agricultural or residental situations. Have you ever run a mower or tiller through a weedy area and then looked closely at the amount of vegetative matter (and potenially seeds) on the mower deck or in the nooks and crannies of the machine? All that junk (and seeds) can fall off in subsequently visited areas and introduce new weed species or biotypes into the new area.
It is a good...
- Posted By: Gale Perez
- Written by: Luis Espino
A new weed has been identified in California rice. Its name is winged primrose willow (WPW), and it is a weed in rice fields in the southern US. So far this weed has been identified only in fields near Richvale. The Butte County Ag Commissioner is working to make sure this weed doesn't spread to other areas. The UC Davis Rice Weed Science Project and UCCE is collecting information about its biology, possible impact and management.
Don't confuse WPW with other waterprimroses, similar weeds that are usually seen around rice fields and ditches and are prostrate. WPW habit is erect, the yellow flowers have 4 petals, and the stem has wings or membranes that run longitudinally. Unlike other waterprimroses, WPW can grow within...