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w w w. v w m m e d i a . c o m S e p t - O c t 2 014 | V I N E YA R D & W I N E RY M A N A G E M E N T 6 9 vines are fed back into the previous results can be implemented using more advanced statistical methods. PRACTICAL CONSIDERATIONS This article shows the complex- ity of testing grapevines for the presence of viruses. Probabilistic statistics are important tools to be applied to grapevine virus testing. Once the infection rate in the vine- yard is better understood, these tools can be refined to meet the zero-infection tolerance goal. The as soon possible, to develop a test- ing plan that fits the vineyard's bud- get and quality goals. Judit Monis is the plant health ser- vices division manager at Eurofins STA labs in Gilroy, Calif. The lab pro- vides disease-testing services and specializes in grapevine clean plant- ing stock and vineyard disease man- agement. Dr. Monis can be reached at juditmonis@eurofinsus.com. Comments? Please e-mail us at feedback@vwmmedia.com. sampling will be different depend- ing on the purpose of testing (clean stock versus determining a problem in the vineyard), as well as the type of virus we aim to detect, as the biology of each virus is different. U l t i m a t e l y, t h e n u m b e r o f samples submitted for testing is budget-driven. Due to the large expense of planting, the maximum possible samples should be tested prior to grafting. Planting a vineyard is very costly and the best approach is to plan ahead. Work closely with nursery and testing lab personnel Grapevine Disease Testing and Diagnosis We are always here to help you! ! ! $-+)%+/0#+*/) $-+)%/-1#1,.) & ! AL&L Crop Solutions, Inc Plant Disease Diagnostic Laboratory 45133 County Road, 32B Davis, CA 95618 " Field sales team Over 100 years of combined experience. Bob, Paul, Jerr y and Jerr y. THE STRONGEST EQUIPMENT FOR THE MOST DELICATE HARVEST. When it comes to North Coast agriculture, you have a special set of needs. That's why we offer John Deere Narrow Series Tractors — specially engineered to easily maneuver in vineyards and orchards. See the Belkorp Ag team today for more equipment and tools made just for your business. GREAT FINANCING AVAILABLE 5EN Narrow Series Tractors Available in cab and open-station Only 48" wide Harvest Rental Returns Available now! Calistoga, CA 1856 Lincoln Ave. (707) 942-4566 Santa Rosa, CA 4101 S. Moorland Ave. (707) 584-9111 Ukiah, CA 247 E. Perkins St. (707) 376-9670 One team, one goal: Your satisfaction. BelkorpAg.com BAS7X50501VWM-4C