Weed Workgroup Meeting

University of California, Davis
November 13-14, 2001

2002 meeting to be held in Salinas on November 12-13, 2002

Agenda

Tuesday, November 13, 2001
10:00 am Coffee and rolls
10:15-10:20 Welcome, & theme "nontraditional weed control" - Steve Fennimore
10:20-10:40 Organic agriculture, weed control research needs - Eric Brennan, USDA-ARS, Salinas
10:40-11:00 Soil solarization, acetic acid where do we go from here? - Clyde Elmore
11:20-11:40 Brush hoe for weed control in vegetables - Richard Smith
11:40-12:00 Discussion of plans for the GPS project funded by DANR - Tom Lanini

12:00-1:00 Lunch - box lunches

1:00-1:30 Rick Melnicoe, Director Pest Management Centers, &
Becky Sisco, Director, Western IR-4 Program
1:30-1:45 Ideas for new DANR projects - Steve Fennimore

1:45-3:15 Breakout sections: Vegetable crops or Non-crop areas

3:15-3:30 Break

3:30-5:00 Breakout sections: Trees & vines, or Turf and ornamentals

Dinner - Tom and Brenda Lanini's House

Wednesday, November 14, 2001

7:45 am Coffee and rolls
8:00-9:30 Breakout sections: Agronomic or Aquatic

9:30-9:45 Break

9:45-11:15 Section reports, future agenda and priorities

11:15-12:00 Discussion of new position needs
Faculty needs - Joe DiTomaso
Farm advisor needs - Richard Smith

12:00 to 12:45 Executive committee meeting (working lunch)
Committee members: Mick Canevari, Albert Fischer, Dave Cudney, Steve Fennimore, Jodie Holt, Richard Smith

12:00-1:00 Lunch (box lunches)

1:15 to 4:00 Digital camera training workshop (confirmed)
Adjourn

Business

Commodity Reports

Vegetable Section Notes
submitted by Steve Fennimore

Asparagus

Milestone, Sandea and Valor are being evaluated for weed control in asparagus. Sandea provides good nutsedge and perennial pepperweed control. Valor is a current IR-4 project, and a crop tolerance is being pursued for asparagus.

Broccoli

Authority (sulfentrazone) is safe applied preemergence in broccoli at 0.11 to 0.15 lb ai/A and provides excellent shepherds-purse control. The manufacturer has not yet decided whether to register Authority in California, so no further work is planned in the short term. Pyridate at 0.23 lb ai/A applied postemergence provided acceptable weed control and was safe on the crop.

Celery

Dual Magnum and sulfentrazone have been evaluated in celery, and have provided good weed control and were safe on the crop.

Lettuce

Roundup Ready lettuce has been evaluated, and provides excellent control of most weeds in lettuce except burning nettle and little mallow. Crop tolerance is excellent.

Muster herbicide will be evaluated in lettuce in 2002.

Onions

Valor provided excellent weed control in bulb onions when applied at the 2-leaf stage of onion. However, crop tolerance was much better at the 6-leaf stage. Valor was evaluated in green bunching onions, but crop tolerance was not acceptable.

Tomato

Roundup Ready tomato was evaluated, but the crop tolerance was not acceptable.

Dual Magnum has a section 18 for use on processing tomato. Dual Magnum + Shadeout or Dual Magnum + Devrinol are excellent preemergence treatments in tomato.

Sulfosulfuron was safe on tomato and provided control of dodder. However, this herbicide has difficult plantback restrictions, for example, only wheat can be planted within 12 months after use.

General

DRA35 is a very effective organic approved burndown "herbicide" product. It provided excellent control of small weeds.

Turf and Ornamentals

Turf

Ornamentals

Non-Crop

Agronomic Session

Discussion Group:

Alfalfa

Beans

Clover

Cotton

Corn

Small Grains

Sugar Beet

Rice

Notes of Executive Committee Meeting
November 14, 2001

The committee is composed of:
2- UCCE Weed Specialist or Statewide IPM Advisor
2- UC Academic Senate Faculty or USDA Scientist
2- UCCE Farm Advisor

Weed Workgroup Executive Committee
(2002 Co-Chairs in bold)

1. The next meeting will be held on November 12 and 13, 2002 in Salinas, CA. The meeting site will either be the USDA Station conference room or at the Monterey County Ag. Center conference room.
   
2. Richard Smith and Steve Fennimore will co-chair the 2002 meeting.
   
3. We will likely have a GPS training session at the 2002 meeting.
   
4. A short tour will likely be conducted either to look at plots or possibly some industry sites such as a salad plant.
   
5. No current committee member terms expire, so the committee will stay intact.