- Author: Joe DiTomaso
- Author: Tom Barr
Aquatic weed propagules pose a serious long-term management problem. Curlyleaf pondweed (Potamogeton crispus) produces numerous asexual propagules that make traditional management difficult. We initially compared the effect of three benthic barrier materials (jute, polyethylene and rubber) on the control of curlyleaf pondweed turions (see Fig. 1 for example of bottom barriers) in both laboratory bench studies and studies using larger mesocosms. After the bottom barriers covered the turions for eight weeks we then determined the viability of the turions by allowing them to sprout. Our results showed that the jute and polyethylene did not give any control of curlyleaf pondweed sprouting, but the rubber barrier, which blocks both...
- Posted by: Gale Perez
Based on the bestselling Weeds of California and Other Western States, the Weed Pest Identification and Monitoring Cards is the perfect pocket-sized companion for anyone working in the field.
These 48 cards cover the most common weeds, grouped into 8 categories for easy identification.
- Broadleaf annuals, erect
- Broadleaf annuals, low growing
- Broadleaf annual, scrambling
- Broadleaf perennials, not viney
- Broadleaf perennials, viney
- Grass annuals
- Grass perennials
- Sedges
Each weed is identified by a description and excellent close-up color photographs of...
- Posted by: Gale Perez
- Contact: Tunyalee A. Martin
Full-time position with UC IPM, located in Davis, CA:
Senior Editor – Pest Management Guidelines Coordinator
Application instructions and a full position description are available on the UC Agriculture and Natural Resources employment web site (ucanr.edu/sites/anrstaff/Employment_Opportunities).
This position is with the University of California Statewide Integrated Pest Management Program (UC IPM). UC IPM develops and promotes integrated and ecologically sound pest management programs in California (
- Author: Rob Wilson
Happy New Year! It’s too cold in Tulelake for field work, so I’m busy summarizing 2013 research results. Today I posted a progress report on the Intermountain Research and Extension Center (IREC) website summarizing results for our 2013 onion weed control research. The study was conducted at IREC to evaluate rates of DCPA (Dacthal) alone and combined with pendamethalin (Prowl H20) applied at loop stage for control of kochia in onions grown on silty clay soil with high organic matter. Sulfentrazone (Zeus), an unregistered herbicide in onions, was tested at various rates as a preemergence and postemergence herbicide on the same soil type. Prowl H20 application timing was also evaluated by comparing applications...
- Author: Lynn M. Sosnoskie
- Author: Brad Hanson
- Author: W Thomas Lanini
Introduction:
According to the most recent statistics, the United States (US) was the world's sixth largest producer of melons, with a significant proportion (>50%) of the country's production occurring in California. In 2011, 36,900 and 10,300 acres of cantaloupes and honeydews were harvested, respectively. Combined, the crops were valued at an estimated $227 million, which is an increase of 29% over 2010.
Weed control in melons is difficult due to the vining nature of the crop (which can prohibit mechanical cultivation) and the limited availability of safe and selective preemergence (PRE) and postemergence (POST) herbicides. Early-season weed control is crucial in order to prevent competitive...