http://ucanr.org/sites/lindcove/Lindcove_REC_Blog/index.cfm?blogrss=31890&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed Citrus blog en-us UC ANR http://cyber.law.harvard.edu/rss/ Sun, 19 May 2013 04:42:25 PST Sun, 19 May 2013 04:42:25 PST UC ANR Annual disease testing for Citrus tristeza virus (CTV) is nearly complete at LREC. Each year we test all field trees for presence of the virus using the Direct Tissue Blot Immunoassay method, which is a form of ELISA. This year we have more than 11,000 trees to test. CTV is found in the phloem tissues of citrus plants, and virus titer is typically highest during April in the San Joaquin Valley. Field technicians Cody McCarter and Jessica Seymore work as a team to collect the tissue, which......
]]> Fri, 19 Apr 2013 13:59:30 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9796&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9796 Dr. Mikeal Roose (Dept. of Botany and Plant Sciences, UC Riverside) attends the first harvest of a new rootstock trial located south of LREC in a private orchard. The research trial consists of 300 trees of Tango mandarin on many different rootstocks. The fruit was picked into the small totes shown here, which prevents delicate mandarin varieties from being crushed, as compared to oranges which are normally picked into 24-carton fruit bins weighing 900 lbs. After harvest, the trees were......
]]> Thu, 21 Mar 2013 10:34:42 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9574&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9574 This week Beth Grafton-Cardwell's entomology research team harvested 288 3-year-old 'Tango' mandarin trees, and ran the fruit over the Lindcove fruit grading system. Her group is studying the long-term effects of reducing citrus leafminer densities with insecticides and what impact that has on the development of the trees and the number, size, color, and Brix of the fruit....
]]> Wed, 27 Feb 2013 14:58:35 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9390&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9390 The UC ANR Program Council held their February business meeting at Lindcove REC, where they were able to taste a selection of the more than 400 citrus varieties grown at the Center....
]]> Wed, 20 Feb 2013 10:42:34 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9345&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9345 Each year Lindcove REC donates fruit for the World Ag Expo in Tulare. This year's show has more than 1400 exhibitors and expects to receive at least 100,000 visitors. The colorful fruit display at the Citrus Research Board's booth has 55 varieties, with Dr. Tracy Kahn (UC Riverside) and Dr. Rock Christiano (Lindcove REC) on hand to answer questions about new varieties, plant propagation, diseases of citrus, and the clean budwood program administered by the Citrus Clonal Protection Program.......
]]> Thu, 14 Feb 2013 10:37:53 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9297&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9297 New citrus varieties developed by the UCR Citrus Breeding Program are propagated at Lindcove and planted in the research blocks. Dr. Mikeal Roose (Dept. of Botany, UCR) heads the project, and pictured here is the newest addition to his team, Dr. Soon Park. The major objective of the program is to release exciting new citrus varieties of commercial importance to the citrus industry. Recently the program has released three varieties of low-seeded mandarins, 'DaisySL', 'KinnowLS', and......
]]> Thu, 07 Feb 2013 11:30:33 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9239&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9239 Last weekend the Sequoia chapter of the California Rare Fruit Growers held their annual meeting at Lindcove. More than 50 people attended the event, which included a potluck lunch and a tour through the Citrus Variety Collection Demonstration Orchard. The block has 183 varieties available for tasting, and attendees enjoyed strolling through the orchard at a leisurely pace. New varieties chosen by Dr. Tracy Kahn (UC Riverside) are added to the collection every year....
]]> Wed, 23 Jan 2013 10:43:08 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9117&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9117 This week the Entomology Team is in the Fruit Quality Laboratory. Here they are seen taking fruit measurements from 180 samples of navel oranges from trees that were sprayed at 14 day intervals 0, 6 or 12 times with low rates of narrow range oil. Frequent applications of oil can help reduce Asian citrus psyllid densities in organic situations. This trial is examining the effect of these frequent oil applications on fruit quality....
]]> Thu, 10 Jan 2013 14:13:45 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9042&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9042 Pictured here are thousands of slices of satsuma mandarins from one of the Lindcove research blocks. Dr. Mikeal Roose (UC Riverside) is studying the tree and fruit characteristics of several new satsuma varieties, to determine which ones show promise for commercial production in the San Joaquin Valley. The study analyzes scion and rootstock compatibility, tree size, fruit yield, and fruit quality. Satsumas are known for their easy-to-peel rinds, tolerance to cold winters, and as one can see,......
]]> Fri, 04 Jan 2013 11:25:49 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8994&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8994 The Lindcove Fruit Display and Tasting event last weekend was a big hit both with the growers and the general public. If you missed it, mark your calendar for Dec 13 (growers) and Dec 14 (homeowners) for 2013. We had over 100 varieties of citrus to taste and enjoy plus many educational moments with Lindcove staff, Cooperative Extension Advisors, UC Master Gardeners, and Faculty from UC Riverside....
]]> Wed, 19 Dec 2012 09:02:07 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8936&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8936 Early season navel oranges command high prices in the export market, and Fukumoto navels are a prized commodity in the San Joaquin Valley. The Fukumoto harvest generally follows the satsuma and clementine harvests, although this variety of navel hangs well on the tree into February. Fukumotos have a characteristic deep orange color, superb flavor, and smooth texture, which earns them a top spot in early season exports. Dr. Mikeal Roose (UC Riverside) is studying the yield, canopy size, and......
]]> Tue, 04 Dec 2012 13:55:26 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8834&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8834 This week the packline grader is getting a test run and color check to ensure "what you see is what you get" on the packline output. Five projects are scheduled to use the packline grader between now and the end of the year, with an estimated 458 packline runs. For research purposes, a packline run is all the fruit from one tree run together as one lot. Data from the each tree lot can be analyzed separately. In this photo Senior Agricultural Technician Jose Hernandez places Fukumoto navel......
]]> Tue, 13 Nov 2012 13:44:00 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8717&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8717 Mid-autumn in the San Joaquin Valley indicates the beginning of the olive harvest. Lindcove is primarily known for it's citrus blocks, but has a small planting of Manzanillo and Sevillano olive trees. Olives are generally alternate bearing, and Dr. Carol Lovatt (UC Riverside) and Dr. Elizabeth Fichtner (Tulare County Farm Advisor) have been experimenting with plant growth regulators to improve flowering for the off years, in efforts to improve crop yields. At harvest, fruit from each tree is......
]]> Wed, 31 Oct 2012 08:04:18 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8628&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8628 The Fruit Quality Laboratory at the Lindcove Research and Extension Center is in full swing for the 2012-2013 harvest season. Jamie Nemecek demonstrates use of the hydraulically powered Boswell Press, which squeezes citrus fruit at 1000 psi to produce juice for testing. The juice is used to measure total soluble solids (TSS or commonly referred to as °Brix) and to calculate % acid (titratable acid or TA). These values are needed to calculate the California Standard, a fruit maturity......
]]> Mon, 22 Oct 2012 14:09:41 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8564&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8564 On October 12, Lindcove REC provided a post-conference tour for the attendees of the California Citrus Conference. Rock Christiano, Staff Research Associate for the Citrus Clonal Protection Program explained how the program provides pathogen-free budwood to the citrus industry. The participants toured the screenhouses that generate the budwood and the new greenhouse that will provide a protected environment for important citrus germplasm. Dr. Tracy Kahn (UC Riverside) gave a walking tour of......
]]> Tue, 16 Oct 2012 10:57:55 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8519&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8519 This week Lindcove REC is busy in the greenhouse potting Carrizo rootstock seedlings, which were planted as seeds into cone flats in early summer. Healthy roots indicate promising growth, as these plants are destined for budding next June with new varieties for the breeding program....
]]> Tue, 02 Oct 2012 14:20:14 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8422&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8422 Happiness is an empty greenhouse. With more than 1000 potted trees planted in research blocks at Lindcove REC this summer, we have room to move around and make some renovations to the greenhouses. Physical Plant Mechanic Dan Seymore installs new benches, which will soon be filled with potted rootstock seedlings....
]]> Wed, 26 Sep 2012 12:00:20 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8391&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8391 On Thursday Sep 13, Lindcove REC hosted a field day for growers and pest control advisors on the subject of citricola scale biology, monitoring and control. The program included a talk given by Beth Grafton-Cardwell, field identification of live vs. dead scale, field sampling and specimens under microscopes inside the mobile laboratory. Proper use of a hand lens was demonstrated by assistants in the field. A monitoring protocol was described to help PCAs determine if scale counts exceed the......
]]> Thu, 13 Sep 2012 14:40:11 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8322&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8322 A block of promising mandarin varieties of commercial importance were planted at Lindcove this week, with Dr. Tracy Kahn and Dr. Mikeal Roose (UC Riverside) in attendance. Additional plantings of the same variety and rootstock combinations will be made elsewhere in the coming weeks, to create multi-location replicated trials that cover the major citrus growing regions of California. This will allow for performance of the varieties to be evaluated and compared, and new imported varieties will......
]]> Wed, 22 Aug 2012 15:32:48 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8204&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8204 Lindcove personnel are planting more than a thousand trees this summer in the research blocks. Most of these are for replicated trials for Mikeal Roose and Tracy Kahn (UC Riverside) that involve new varieties and rootstock evaluations, and the rest are mandarin irradiations for the breeding program. In this photo Principal Agricultural Technician Donald Cleek is busy drilling holes....
]]> Mon, 13 Aug 2012 15:40:30 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8130&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8130 Lisa Fischer was recently hired as the Associate Director of the Research and Extension Centers. This week she is touring several of the Centers with the goal of getting to know the people, facilities and programs. On Wednesday, she visited Lindcove where she was given a tour of the orchards, CCPP screenhouse/greenhouse area, fruit quality laboratory and packline and discussed the research and extension programs with the staff. We look forward to her assistance in helping us to achieve our......
]]> Fri, 10 Aug 2012 06:42:42 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8118&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8118 Sara Scott and Jennifer Ruvalcaba mix up a tank of an experimental insecticide they are testing for citricola scale control on a block of navel oranges at Lindcove REC. For more than 20 years, Dr. Beth Grafton-Cardwell has led a research team that screens new insecticides for effectiveness against citrus pests as well as impact on natural enemies. Successful products become incorporated into the citrus IPM program....
]]> Wed, 08 Aug 2012 13:30:18 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8107&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8107 Rock Christiano was raised on a small orange orchard farm and his passion for horticulture has inspired his education. He received an Agronomy B.S degree in 2001, a Plant Pathology M.S. degree in 2004, and a Plant Pathology Ph.D degree in 2006, all from major universities in Brazil. He has studied epidemiology of citrus canker on different species and varieties of citrus and he has collaborated with many citrus research centers, such as FUNDECITRUS, a major citrus research station in the Sao......
]]> Thu, 26 Jul 2012 14:35:00 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8016&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8016 Jamie Nemecek surveys citrus leafminer damage in a large block of young Tango mandarin trees. Mature citrus trees (>4 years old) can easily tolerate the mining of new flush by citrus leafminer with no ill effects. However, growth of young trees is thought to be affected by mining damage. Growers apply both systemic and foliar insecticides in an attempt to minimize citrus leafminer damage. A four-year study is underway at UC Lindcove to determine if insecticide treatments improve growth......
]]> Wed, 25 Jul 2012 13:54:52 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8012&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=8012 This week Lindcove REC is performing the annual citricola scale counts, to determine what type of treatment is warranted this year, if at all. Some San Joaquin Valley citricola scale populations are known to be resistant to Lorsban, an organophosphate pesticide. Other treatment options are available, such as using softer pesticides that are less lethal to natural enemies. One hundred leaves are plucked from each block, and healthy first instar nymphs are counted under a dissecting......
]]> Mon, 16 Jul 2012 15:57:04 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7940&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7940 Lindcove staff member Gerardo Perez is budding the scion Parent navel to Carrizo rootstock for an upcoming research project. First a T-cut is made on the rootstock plant through the bark just deep enough to reach the cambium layer. Then an individual bud from the scion budstick is cut away, cutting through the cambium layer. The bud is slotted into the T-cut so that the two cambium layers will fuse and grow together over several weeks. The newly slotted bud is wrapped tightly with......
]]> Thu, 28 Jun 2012 10:56:31 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7822&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7822 Three times each year the Citrus Clonal Protection Program (CCPP) at UC Riverside conducts a budwood cut at the Lindcove Research and Extension Center. The citrus trees that provide the budwood are grown inside Lindcove’s protective screened buildings and the budwood is distributed from LREC to the nursery industry. The screening prevents insect vectors such as aphids and psyllids from reaching the trees and potentially infecting them with diseases. All CCPP screenhouse trees are......
]]> Tue, 19 Jun 2012 11:45:12 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7758&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7758 A portion of the roads around the main buildings at Lindcove are being reworked and paved. This is a very much appreciated upgrade provided by UC Ag and Natural Resources....
]]> Thu, 14 Jun 2012 16:31:51 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7733&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7733 Dr. Frank Byrne is an Associate Researcher with the Dept. of Entomology, UC Riverside. He is conducting neonicotinoid uptake research trials at Lindcove REC, to test the efficacy of these systemic pesticides as a control measure for Asian citrus psyllid (ACP). Neonicotinoids such as imidacloprid can be applied directly to the soil, injected into irrigation drip lines, sprayed onto tree trunks, or placed as slow-release tablets into greenhouse pots as shown here. The tree takes up the......
]]> Mon, 11 Jun 2012 09:47:04 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7691&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7691 Citrus Tristeza Virus (CTV) testing is complete at the Lindcove Research and Extension Center. Every tree at the Center is tested annually for presence of the virus, and infected trees are removed. This year we are using a new technique for half of our 12,000 trees; a direct tissue blot immunoassay (DTBIA-ELISA) with guidance from Dr. Ray Yokomi at USDA in Parlier. For the remaining trees we are collecting leaf samples for submission to the Central California Tristeza Eradication Agency in......
]]> Tue, 08 May 2012 15:34:01 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7453&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7453 Dr. William Cheung is a chemist working for the Department of Mechanical and Aerospace Engineering, UC Davis. In this photo he is sampling a navel orange tree at Lindcove REC that is infected with Citrus Tristeza Virus (CTV). He is using a device that utilizes Differential Mobility Spectrometry (DMS) to detect diseased plants that appear healthy. Stressed or diseased plants release unique volatile organic metabolites resulting from host-plant interactions, which can be detected by DMS. The......
]]> Fri, 01 Jun 2012 10:26:24 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7618&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed takapaun@ucanr.edu(Therese Kapaun) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7618 In the 1990s, the Citrus Research Board gifted a Sunkist electronic fruit grading system to Lindcove REC, that greatly expanded our postharvest research capabilities.  We recently upgraded the citrus fruit grading system at LREC with a Compac line, thanks to another generous gift from the Citrus Research Board.  Dan Hostetler, Chair of the Plant Sciences and Technology Department at Cal Poly Pomona, heard that we were replacing the Sunkist line and contacted us to see if we could pass it on to......
]]> Sat, 21 Apr 2012 12:28:30 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7315&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7315 The photo shows an 8-year-old Tango mandarin tree at Lindcove that is being harvested.  Dr. Mikeal Roose (UC Riverside Botany and Plant Sciences) is conducting research in this plot to look at various lines of Tango on differenct roostocks to see how they behave long-term....
]]> Mon, 16 Apr 2012 10:43:31 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7264&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7264 Many of you have heard, that huanglongbing was found in a tree in a yard in Hacienda Heights in southern California.  The disease was found by collecting live Asian citrus psyllids at a trap location into alcohol and testing them for the pathogen.  When infected psyllids were found for this location, all the trees in that site were tested, and one came up positive for the disease.  The tree was a lemon topworked with pummelo and it was the pummelo that was infected.  State and Federal officials......
]]> Mon, 09 Apr 2012 08:05:38 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7219&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7219 Lindcove recently hosted a Tulare-Kings Master Gardener citrus training day with farm advisor Michelle LeStrange.  The featured speakers were Lance Walheim who spoke about citrus varieties, Neil O'Connell who discussed irrigation and fertilization, Beth Grafton-Cardwell who described common citrus pests and their management, and Georgios Vidalakis who explained how disease-free citrus trees are created and warned about deadly citrus diseases around the world.  Craig Kallsen demonstrated citrus......
]]> Sun, 18 Mar 2012 15:45:10 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7057&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7057 Introducing the newly updated IPM for Citrus—3rd Edition. Now with even more photos, more resources, and more pests! Learn to apply the principles of integrated pest management to identify and manage more than 150 common citrus pests, diseases, and disorders. Look for brand new sections on Asian Citrus Psyllid, Citrus Leafminer, Glassy-Winged Sharpshooter and more! Important information on physical disorders, production problems and harvest related problems is also covered. This manual of pest......
]]> Fri, 24 Feb 2012 13:51:33 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6890&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6890 Dan Seymore puts the finishing touches on the stainless steel fruit take outs he built for the new fruit grading system at Lindcove.  These will allow the researchers to evaluate the fruit by any chosen parameter and then they are returned to a central belt where they can be loaded into bins....
]]> Fri, 27 Jan 2012 16:37:50 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6696&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6696 Frost protection kicked in again this week.  Hopefully the rain will arrive soon and give everyone some rest.  If you want to study frost protection in detail, I highly recommend reading the Focus on Frost Protection issue of Sep/Oct 2011 Citrograph.http://www.citrusresearch.org/frost_issue...
]]> Wed, 18 Jan 2012 17:39:22 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6635&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6635 At Lindcove we had 14 nights of wind machine activity during December to protect the citrus fruit as temperatures hovered around 26 degrees.  The citrus fruit is looking good and we are glad to get a break from frost protection....
]]> Wed, 04 Jan 2012 13:52:31 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6511&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6511 Lindcove REC had 90 growers attend the Friday session and 250 homeowners attend the Saturday session of the Fruit Display and Tasting event last week.  More than 160 varieties of citrus were available for tasting.   The homeowners walked away with fruit in their bags at the end of the session (> 10,000 pieces of fruit disappeared in 20 minutes) and a new appreciation for the many citrus varieties available.  We thank Mikeal Roose and Tim Williams for demonstrating their seedless mandarin......
]]> Fri, 16 Dec 2011 15:17:49 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6424&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6424 Friday Dec 9, from 10 am-1 pm is the Lindcove fruit display and tasting.  In addition Mary Lu Arpaia and David Obenland will have a sensory tasting booth to collect data on your preferences and Tracy Kahn will conduct a walking tour of the citrus variety demonstration block.  Farm Advisors Craig Kallsen and Neil O'Connell will be present to answer questions and Mikeal Roose will be available to discuss new low-seeded varieties developed by his program.  If for some reason you can not attend on......
]]> Mon, 05 Dec 2011 10:10:11 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6315&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6315 ]]> Fri, 18 Nov 2011 15:52:35 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6224&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6224 With the help of JBT FoodTech, Lindcove staff revamped the section of the packline we use for mandarins.  We can now load, drench, wax and dry mandarins and simulate commercial packing house treatments. We upgraded the mandarin line to help researchers respond to the industry shift towards mandarins.  In this photo, Frost Owari mandarins from Marylu Arpaia's sensory tasting trials are being run through the line....
]]> Thu, 10 Nov 2011 08:18:56 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6158&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=6158 The unique partnership between the University of California and the Citrus Research Board continues with the building of a new greenhouse at the Lindcove Research and Extension Center. This greenhouse will house germplasm from the Citrus Clonal Protection Program, which is the basis for the disease-free budwood release program.  Thank-you again to the citrus industry for this donation to Lindcove!...
]]> Fri, 14 Oct 2011 12:48:13 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5967&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5967 Mark Beck and Kaye, visitors from Florida, arrived in time for the first fruit display and tasting event at Lindcove.  Twenty-one varieties of satsuma mandarins were on display and while they were less than fully mature, the color and flavor comparisons were interesting to growers and nurserymen.  We will retaste these varieties as well as some clementines on October 27. ...
]]> Fri, 07 Oct 2011 14:52:48 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5937&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5937 Come experience our first mandarin tasting this week Oct 6 from 10 am to 1 pm (22963 Carson Ave. Exeter).  More than 20 varieties of satsuma mandarins in various stages of maturity will be displayed whole and sliced for tasting.  We will provide a report of the current and average sugar acid ratios and Brix.  At later dates we will display the same varieties to allow visitors to experience characteristics such as color, flavor and rind quality as the season progresses....
]]> Mon, 03 Oct 2011 13:41:23 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5900&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5900 The Citrus Research Board provided funding for a new citrus fruit grading system for Lindcove.  The Compaq system has three sets of cameras (InVision 9000, ultraviolet, near infra-red) that will allow us to do more than just size, count and grade the fruit, but also measure length and width, volume, density, scarring damage, rot, puff and crease, dryness and Brix.  The highly advanced software will record measurements for each individual fruit which will allow us to run correlations between all......
]]> Mon, 03 Oct 2011 08:42:49 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5889&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5889 Staff Research Assistant John Bash from the Citrus Clonal Protection Program (CCPP) at UC Riverside directs the fall budwood cut at the Lindcove Research and Extension Center.  The citrus trees that provide the budwood are grown inside Lindcove’s protective screened buildings and distributed from there to the nursery industry.   The screening prevents insect vectors such as aphids and psyllids from reaching the trees and potentially infecting them with diseases.  The CCPP screenhouse trees are......
]]> Fri, 23 Sep 2011 08:17:05 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5833&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5833 UC Riverside researchers Mikeal Roose and Tracy Kahn are evaluating seed content in Valencia oranges as part of a mutation breeding project to find new cultivars with lower seed content.  Budwood of the existing Olinda Valencia cultivar was irradiated to induce mutations and trees were then propagated from the treated buds.  The resulting trees are grown at Lindcove Research and Extension Center and then fruit from each tree are cut to determine seed content.  Trees that produce many fruit with......
]]> Thu, 25 Aug 2011 14:42:36 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5611&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5611 The Citrus IPM research team at Lindcove REC tests the efficacy of pesticides and provides recommendations to pest control advisers on strategies for managing citrus pests in the San Joaquin Valley.  A long, wet spring has resulted in exceptionally high citricola scale populations this summer, and control is expected to be difficult due to the insect’s known resistance to organophosphates.   Heavy infestations of citricola can dramatically limit fruit set.  Three experimental insecticides are......
]]> Wed, 17 Aug 2011 08:29:14 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5540&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5540 On July 27, Dr. Beth Grafton-Cardwell held an earwig field day at Lindcove featuring the work of visiting Spanish student Carla Romeu Dalmau.  Earwigs can be a pest of new citrus plantings when they feed on the flush growth and occasionally damage citrus fruit just after petal fall.  Carla has shown that the flush damage occurs in the spring but not the summer and that adults are efficient predators of various insect pests including California red scales, aphids and collembola.  Thus, they are......
]]> Tue, 09 Aug 2011 10:53:23 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5480&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5480 Dr. Beth Grafton-Cardwell, with the help of assistants Sara, Jennifer and Jamie, is releasing earwigs into the blue arena surrounding this young citrus tree.  The purpose of the release is to study the level of damage earwigs cause to young citrus at various times of the year. ...
]]> Fri, 08 Jul 2011 16:52:25 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5282&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5282 Each year, with funding provided by the California Citrus Nursery Board, we test every tree at Lindcove for citrus tristeza virus (CTV), a disease that is spread by aphids.  While the infected trees are symptomless, we remove them so that infections do not affect the research results of the various trials being conducted at LREC.  For many years, the average number of trees removed was 3 per year.  In 2007 and 2008 we had a sudden increase in the number of infected trees (52 and 83 infected......
]]> Tue, 05 Jul 2011 09:40:19 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5212&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5212 Dr. William Cheung is conducting tests at Lindcove REC to profile the response of a Washington navel orange tree infected with citrus tristeza virus (CTV) compared to an uninfected tree.  A mobile sensor employing differential mobility spectrometry (DMS) records and analyzes the biogenic volatile organic compound (BVOC) signature emitted from the infected and noninfected plants.  The DMS BVOC analysis is designed to be an initial screening tool for rapid sampling of pathogens in citrus. ......
]]> Tue, 21 Jun 2011 07:45:04 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5161&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5161 With University of California funding, we replaced the refrigeration units in the walk-in cold storage rooms in the packline facility at Lindcove.  This will help us regulate the temperature better in these rooms and allow new and interesting experiments to be conducted at LREC. ...
]]> Thu, 02 Jun 2011 11:27:31 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5013&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=5013 Volatile organic compounds react with NOx to produce ozone which is an air pollutant affecting human health and plant growth.  Silvano Fares, John Karlik and Allen Goldstein (shown left to right below), provided an imformative 'Featured research seminar' at Lindcove in May 11 to explain the results of their research, which suggests that citrus helps to reduce ozone....
]]> Fri, 27 May 2011 15:43:44 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=4966&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=4966 The benches in the entomology greenhouse at LREC are being renovated in order to better support potted citrus.  Seedlings are grown in this house and used for experiments to test the effects of insecticides on citrus leafminer.  These plants are also used to determine if pheromone disruption can prevent mating, egg laying and plant damage by the leafminer larvae....
]]> Mon, 23 May 2011 13:32:47 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=4928&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=4928 The Citrus Research Board is funding the purchase of a new packline grading system for the Lindcove research program.  Compaq Sorting Equipment will be building the line this summer and we hope to have it installed for the fall research season.  The new line will expand our research capabilities from fruit size, number and color to fruit weight, fruit shape, texture, blemish, brix, dry matter, internal defects, and other parameters because of the addition of advanced software, precision......
]]> Tue, 10 May 2011 10:11:25 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=4834&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=4834 Dr. Tracy Kahn (left) from the Department of Botany and Plant Sciences at UC Riverside leads tours several times per year through the Citrus Variety Evaluation Orchard at Lindcove Research and Extension Center (Exeter, CA).  Containing nearly 200 different varieties, Dr. Kahn maintains this orchard for the benefit of growers and nurserymen to see and taste exciting new citrus varieties.  Dr. Kahn is also the Principal Museum Scientist for the UC Citrus Variety Collection in Riverside, which was......
]]> Fri, 15 Apr 2011 15:11:39 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=4638&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed eegraftoncardwell@ucanr.edu(Elizabeth Grafton-Cardwell) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=4638