|Principal Investigators of CPGRU|
Phone: (530)754-7461 FAX: (530)754-7195
|Dr. Baumgartner's research is focused on developing vineyard practices that reduce chemical inputs, while achieving production and quality demands. Her research on the epidemiology of Armillaria root disease in || |
Phone: (530)754-9351 FAX: (530)754-7195
|Dr. Browne's research program examines the biology and integrated management of soilborne diseases that affect deciduous tree crops and strawberries. The research is designed to contribute to development of chemical, cultural, and biological alternatives to methyl bromide. A major focus of the lab is determining causes and practical control measures for Prunus replant disease (PRD), that causes stunting and replant failure in almond, peach, and other species of Prunusin absence of plant parasitic nematodes. Evidence to date suggests that PRD has biological cause(s), that it exhibits specificity between peach and grape, and that it can be managed using short-term cover crop rotations as well as several alternative pre-plant fumigants. Additional projects include evaluation of almond and walnut rootsocks and strawberry cultivars for resistance to Phytophthoraspp., evaluation of phosphonate treatments for prevention of perennial cankers and crown rot caused by Phytophthoraspp. on almond and walnut, and detection and genetic characterization of populations of Phytophthoraspp. that affect these crops.|
Phone: (530)752-7060 FAX: (530)754-7195
Dr. Jiang's research project is on post-harvest biology and technology of floricultural/ornamental crops. An array of research approaches will be used to develop sustainable production systems that enhance productivity while reducing loses due to post harvest disease, longevity and quality issues. The project will focus on 1) To understand the molecular basis of plant senescence and abscission; 2) To address how environmental factors such as water, temperature and diseases, effect on the performance of ornamental crops; 3) To develop improved methods and technologies for harvesting, handling, pretreating and storing floricultural crops. One of the basic research programs is the exploitation of virus-induced gene silencing (VIGS) to identify which transcription and regulatory factors that control floral senescence, abscission and other important agronomic traits. This basic research may result in the development and commercialization of flowering plants with enhanced flower colors, improved disease, and stress tolerance and longer flower life time. Such plants are of great interest to the horticulture industry and its consumers.
Phone: (530)752-1137 FAX: (530)754-7195
|Dr. Kluepfel's research program explores the interaction between plants and bacteria at the interface between roots and the surrounding soil called the rhizosphere. The aim of the research is to characterize both individual bacterial species and the microbial community which occupy the rhizopshere of important fruit and nut crops such as walnut, almonds and grapes and understand how they interact and communicate with their plant hosts. Toward this end, different model plant-bacteria systems are being examined. In particular, the laboratory is examining, the behavior and pathogenecity of Agrobacterium tumefaciens, the cause of Crown Gall Disease, on walnut. In addition, a project to detect and characterize the bacterial pathogen, Brenneria rubrifaciens, that causes deep bark canker on walnut is underway. These projects are all supported by our effort to isolate and characterize all the bacterial genes whose expression is modulated by plant-root exudates during bacterial growth in the rhizosphere. This information is being used to identify individual microbial species and/or microbial communities that are beneficial to plant health and antagonistic to disease causing pathogens in the soil in an effort to develop ecologically sustainable disease control methods employing naturally occurring soil bacteria.|
Phone: (530) 754-9763 FAX: (530)754-7195
|Dr. McElrone's research focuses on the development of and evaluation of irrigation practices for vineyard systems that optimally produce grapes while minimizing water usage and negative environmental impacts. Research efforts will focus on understanding of the effects of irrigation practices and water quality on environmental factors that may affect vine physiology, yield, and grape quality in different rootstock/scion combinations. This research is expected to lead to irrigation practices that can be integrated with other sustainable vineyard practices to enhance the competitive ability of |
Phone: (530)752-7535 FAX: (530)752-0382
Dr. Steenwerth's research goal is to develop ecological approaches for sustainable vineyard floor management and determine impacts of management practices on weeds, grapevines, soil microbial communities, and soil quality for
Phone: (530)752-4342 FAX: (530)752-4631
The goal of Dr. Tai's research program is to develop improved rice germplasm for temperate environments and solve problems facing the
Phone: (530)752-0309 FAX: (530)754-7195
Dr. Uyemoto's research focuses on the etiology and biology of grapevine virus diseases including virus characterization and development of assays and control. Dr. Uyemoto has projects with stone fruits on almond leaf scorch incitant Xylella fastidiosa; necrotic union of pluot trees (cause unknown); and stunt of Tieton sweet cherry trees (cause unknown). With grapevines, new viruses are detected using a differential set of hybrid rootstocks. In addition, new stem markings attributed to graft-transmissible pathogens are being investigated. All are lethal conditions.
Phone: (530)752-0766 FAX: (530)754-7195 Email: email@example.com
Dr. Kasuga's research is focused on the molecular genetics of Phytophthora ramorum, the causal agent of Sudden Oak Death. In recent years in California alone, over a million oak trees have been killed by P. ramorum. The pathogen also infects ornamentals, which serve as an inoculum source and means of spread to forest ecosystems. Due to its significance, a genome sequence of the pathogen was published in 2006. Taking full advantage of the genome data, his group conducts comparative genomics and transcriptomics, which will help us to decipher the mechanism of plant-P. ramorum interactions and to facilitate management of the pathogen.
Phone: (530)752-0766 FAX: (530)754-7195
Phone: (530)752-3621 FAX: (530)754-7195
Dr. Sudarshana has projects on black line disease of walnut, grape leaf roll-associated viruses and necrotic union disorders of stone fruits and grapes. His program includes both applied and molecular biology with emphasis on detection and characterization of new viruses.