Cooperative Extension, University of California

FRUIT & NUT NOTES Yolo County February 2003

IN THIS ISSUE: • Yolo/Solano Counties Walnut Growers Meeting • Yolo/Solano/Sacramento Counties Cooperative Extension and

Clarksburg Wine Grape Association Meeting • Sutter/Yuba Dried Plum Day • Grapevine – Fungicide Efficacy

Yolo/Solano Counties Walnut Meeting Tuesday, March 18, 2003 – 8:30 to Noon

Norton Hall, 70 Cottonwood Street, Woodland, CA 8:30am Registration, Coffee and Donuts 9:00am Pruning and Training Walnut Trees by Wilbur Reil, UC Farm Advisor in Yolo and Solano Counties 9:35am Walnut Blight Control and Blight Research by Rick Buchner, UC Farm Advisor in Tehama County 10:10am Break 10:30am Codling Moth Control by Carolyn Pickel, UC IPM Farm Advisor, Sacramento Valley 11:05am Update on Nematode Biology and Management

by Beck Westerdahl, UCCE Specialist, Dept. of Nematology, Davis 11:40am Walnut Black line – County report and question and answer period by Wilbur Reil, UC Farm Advisor in Yolo and Solano Counties 12: noon Adjourn

Sponsored by the University of California, Cooperative Extension *****PCA & Private Applicator credit submitted for approval*****

University of California and U.S. Department of Agriculture cooperating

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YOLO/SOLANO/SACRAMENTO COUNTY UC COOPERATIVE EXTENSION AND CLARKSBURG WINE GRAPE ASSOCIATION MEETING

Friday, March 14, 2003, 8:30 a.m. to afternoon Jean Harvie Senior and Community Center, Walnut Grove

(Stay on levee to south end of Walnut Grove; the Community Center is on the left.) 2.5 hours PCA / CCA/Private Applicator C.E. credit

8:30 Sign in, coffee and refreshments 9:00 Welcome

Fred Vaske, President of Clarksburg Wine Growers Association 9:05 Monitoring Vine Mealybugs with Pheromone to Find & Control New Infestations

Kent Daane, UC Berkeley 9:35 Chemical Control of Vine Mealybug

Walt Bentley, UC Kearney Agricultural Center 10:20 Glassy-Winged Sharpshooter Update Mona Saunders, Sacramento County Ag. Commissioner’s Office 10:30 Break 11:00 Cutting Costs while Maintaining Quality

Paul Verdegaal, UC Cooperative Extension, San Joaquin County 11:40 Wine Grape Marketing Forecast for District 17

John Ciatti, Joseph W. Ciatti Co., San Rafael 12:15 Luncheon – Courtesy of AGRO Crop Insurance and California Crop Insurance Services

Sutter/Yuba Dried Plum Day

Wednesday February 26, 2003 Veterans Memorial Circle, Yuba City

Sponsored by U.C. Cooperative Extension 8:00-8:30am Registration, Coffee and Cookies 8:30-8:40 Swamps and Alligators in Prune Growing Franz Niederholzer, UCCE Sutter/Yuba Counties 8:40-9:10 Insect and Mite Pest Management Review Carolyn Pickel, UC IPM Area Advisor, Sacramento Valley 9:10-9:40 Tree Pull and Trade Issues Update Greg Thompson, PBA 9:40-10:15 Brown Rot Control and Biology Dr. Themis Michailides, UC Kearney 10:15-10:25 Owl Box Research Students from Y.C.O.E.’s Construction Academy 10:25-10:45 Coffee Break 10:45-11:15 Making Money at Harvest Wilbur Reil, UCCE Yolo County 11:15-11:30 Getting the Most Out of Your Fertilizer Dollar Franz Niederholzer, UCCE 11:30-12:00 New Prune Varieties Caroline DeBuse, U.C. Dried Plum Development Program

GRAPEVINE—FUNGICIDE EFFICACY

Fungicide Resistance Powdery Downy Bunch rot Phomopsis Eutypa risk mildew mildew Botrytis Summer Abound high ++++ ++++ + --- +++ --- Bayleton high ++ --- --- --- --- --- Flint 1 high ++++ +++ ++ ++ ++ --- Elevate high ++ --- ++++ ++ --- --- Elite high ++++ --- ++ ++ --- --- Procure high ++++ --- --- --- --- --- Rally high ++++ --- --- --- --- --- Ridomil Gold high --- ++++ --- --- --- --- Rubigan high ++++ --- --- --- --- --- Sovran high ++++ ++++ ++ ++ ++++ --- Vangard high --- --- ++++ ++ --- --- AQ10 2 low +++ --- --- --- --- --- Captan low --- + +++ +++ +++ --- JMS Stylet oil 3 low ++++ --- +++ ++ --- --- Maneb low --- --- ++ --- +++ --- Rovral low --- --- +++ --- --- --- Rovral + Oil low +++ --- ++++ ++ --- --- Serenade low +++ --- + + --- --- Copper low ++ +++ ++ +++ + --- Sulfur low ++++ --- --- --- --- --- Rating: ++++ = excellent and consistent, +++ = good and reliable, ++ = moderate and variable, + = limited and/or

erratic, +/- = minimal and often ineffective, ---- = ineffective, and ?=insufficient data or unknown. 1. Causes severe phytotoxicity on concord grape. 2. Effective early in the season when disease pressure is low. Should be used only in an

integrated program with other chemistries. Is compatible with DMI fungicides, Vangard, Rovral and all insecticides. Do not tank mix with Abound or sulfur.

3. Phytotoxic if used within 2 weeks of Captan or sulfur.

Fungicide Tables for Fruit and Nut Crops and Grapevines—2003 University of California -- 19

Submitted by, Wilbur Reil

Cooperative Extension Presort Standard U.S. Department of Agriculture Postage and Fees Paid University of California USDA 70 Cottonwood Street Woodland, CA 95695 Woodland, CA 95695 Permit No. G-00268 February 20, 2003

To simplify information, when trade names have been used, no endorsement of products named is intended, nor criticism implied of products which are not mentioned. --------------------------------------------------------------------------------------------------------------------- The University of California prohibits discrimination against or harassment of any person employed by or seeking employment by or seeking employment with the University on the basis of race, color, national origin, religion, sex, physical or mental disability, medical condition (cancer-related or genetic characteristics), ancestry, martial status, age, sexual orientation, citizenship, or status as a covered veteran (special disabled campaign badge has been authorized). University Policy is intended to be consistent with the provisions of applicable State and Federal laws. Inquiries regarding the University’s nondiscrimination policies may be directed to the Affirmative Action/Staff Personnel Services Director, University of California, Agriculture and Natural Resources, 1111 Franklin, 6th Floor, Oakland, CA 94607-5200. Telephone (530) 987-0096. University of California and U.S. Department of Agriculture cooperating.

Inside: Yolo/Solano Counties Walnut Meeting March 18, 2003

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