http://www.rssboard.org/rss-specification 720 http://xtf.cdlib.org:8080/xtf/search?docsPerPage%3D100;f47-subject%3Dgrape Results for your query: docsPerPage=100;f47-subject=grape Tue, 01 Jan 2002 12:00:00 GMT http://xtf.cdlib.org:8080/xtf/data/pdf/calag56-3/calag56-3.pdf The use of agricultural contracts between farmers and processors or other buyers has increased substantially in recent years. Roughly half of all U.S. fruit and vegetable production is under contract. Contract usage varies widely across agricultural products. For example, 95% of poultry is raised under contract while only 13% of corn is. The wine grape industry utilizes contracts, yet little is known about the extent of contract use, or the use of specific terms and objectives. We used a survey to analyze contract use among wine grape producers, determine which users are utilizing contracts, and identify how they differ from nonusers. Ninety percent of the growers who responded to the survey have contracts, the majority of which were multiyear, averaging 3.7 years. Growers with more experience, larger vineyards, more expensive grapes and longer relationships with the buyer were more likely to enter into contracts. http://xtf.cdlib.org:8080/xtf/data/pdf/calag56-3/calag56-3.pdf Tue, 01 Jan 2002 12:00:00 GMT http://xtf.cdlib.org:8080/xtf/data/pdf/calag56-6/calag56-6.pdf UC Davis's Foundation Plant Materials Service (FPMS) maintains the disease-tested, professionally identified collection of grape scion and rootstock varieties, which is the core of the California Grapevine Registration and Certification Program. In 1992, newly developed serological testing techniques revealed the presence of grapevine leafroll­associated viruses (GLRaVs) in previously healthy vines in an older foundation propagating block, indicating active and recent virus spread. FPMS responded by increasing isolation distances and implementing a comprehensive virus screening program using the new methodology. The critical problem was the lack of information on leafroll virus epidemiology. When the distribution of infected plants in the old vineyard was mapped, new infections were frequently adjacent to known diseased grapevines. This study examined the ability of mealybugs, a putative leafroll vector, to transmit this group of viruses. We were able to confirm that four species... http://xtf.cdlib.org:8080/xtf/data/pdf/calag56-6/calag56-6.pdf Tue, 01 Jan 2002 12:00:00 GMT