Salinas Valley Agriculture Feed http://ucanr.org/blogs/SalinasValleyAgriculture/?utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed Highlighting agricultural developments, problems, research, & issues for central coast CA en-us UC ANR http://cyber.law.harvard.edu/rss/ Wed, 25 Jan 2012 16:26:55 PST Wed, 25 Jan 2012 16:26:55 PST California Garlic and Onion Symposium 2012 ]]> Wed, 25 Jan 2012 16:26:54 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6676&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6676 Potassium Fertility of Salinas Valley Soils ]]> Fri, 21 Oct 2011 15:45:31 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6029&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6029 Overview of Tipburn of Lettuce Tipburn of lettuce is a calcium-related disorder which causes the development of necrotic areas on the inner leaves of romaine and other leaf lettuce and on enclosed leaves of head lettuce (Photo 1). The necrotic areas likely develop due to a localized calcium deficiency that causes tissue collapse of the affected cells. There are two key factors that affect the development of localized calcium deficiency: 1) uptake of adequate calcium from the soil, and 2) calcium transport through the...
]]> Thu, 25 Aug 2011 09:45:49 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5608&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5608 Naming of Another New Race (Race Pfs 13) of the Spinach Downy Mildew Pathogen Another new race, the 13th, of the downy mildew pathogen (Peronospora farinosa f. sp. spinaciae) of spinach has been found and documented. First identified in January 2010 from spinach in Holtville, California, this race breaks the resistance of several important cultivars. The isolate was initially designated as UA0510C and was characterized with a standard set of differential varieties. Isolates apparently identical to UA0510C have been found in an increasing number of locations throughout...
]]> Fri, 05 Aug 2011 08:11:20 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5441&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5441 Coastal Tomato Affected by Speck in 2011 Speck on coastal tomato. In summer (May through July) 2011, bacterial speck disease of tomato is commonly found in a number of fields in coastal tomato-growing areas in Santa Clara and Monterey counties. No doubt the periodic and prolonged rains earlier this year are a major factor in this unusual development. Symptoms consist of dark brown to almost black spots on leaves and sometimes stems. Leaf spots can be circular or angular in shape and individual spots are generally smaller than ¼ inch...
]]> Tue, 19 Jul 2011 14:16:38 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5334&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5334 Coastal Weather Enhances Botrytis Crown Rot of Lettuce The unusually cold, wet, and rainy weather during March through June 2011 has created conditions that favor the development of Botrytis crown rot of lettuce in several counties in coastal California. Botrytis crown rot, also known as gray mold, has resulted in stand loss and reduced yields in numerous fields. Transplanted lettuce: Crown tissue on transplants in the field becomes brown to orange-brown in color and soft. The characteristic fuzzy gray sporulation of the pathogen is usually...
]]> Wed, 22 Jun 2011 13:50:08 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5177&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5177 Fertilizer Burn Issues on Lettuce In recent weeks a number of samples have come into our office of lettuce plants that have the following symptoms: stunting, yellowing outer leaves and occasionally with wilting during the afternoon (Photo 1).  The symptoms superficially resemble Lettuce Dieback caused by Tomato Bushy Stunt Virus, but Steve Koike has not detected this virus in these plants.  Affected plants also typically have roots that are no longer than 1.5 to 2.0 inches long (Photo 2). Upon careful examination of the root...
]]> Tue, 24 May 2011 12:20:35 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4931&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4931 Wilting Lettuce Plants Damaged by Soil and Wind Factors During the month of April 2011 in coastal California, a number of growers and PCAs are seeing wilting and stunting of young lettuce plants. Affected lettuce typically range in size from the 4-to-6 true leaf through rosette stages and are randomly distributed throughout the field as individually affected plants. Such plants initially fall behind in development and may appear slightly stunted. As the problem worsens, these plants will start to wilt during the day. Eventually the older leaves may...
]]> Tue, 26 Apr 2011 12:00:49 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4719&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4719 Show us your spots! Researchers need samples of bacterial leaf spots on celery, cilantro, parsley, and other crops. Article submitted by: Carolee Bull, USDA Research Plant Pathologist Steven Koike, Plant Pathology Farm Advisor   Since 2002, a severe leaf spot disease on parsley has occurred throughout central coastal California and particularly in Monterey County. Three different bacterial pathogens (Pseudomonas syringae pv. apii, P. syringae pv. coriandricola and an organism very closely related to P. viridiflava) have been associated with these outbreaks on parsley. Of interest to researchers and of...
]]> Tue, 05 Apr 2011 09:43:37 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4519&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4519 Details on the Nitrate Quick Test Article submitted by:Richard Smith, Vegetable Crop and Weed Science Farm Advisor There is increased interest in the use of the nitrate quick test for managing fertilizer decisions in vegetable production. In this Blog, I will go over some details on obtaining a good representative sample in order to conduct the quick test analysis.  Normally soil cores are taken down to 12 inches for lettuce and cole crops; however, for shallow rooted crops such as spinach and baby lettuce, soil cores to 6...
]]> Thu, 17 Mar 2011 09:02:32 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4406&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4406 Naming of a New Race (Race Pfs 12) of the Spinach Downy Mildew Pathogen Submitted by:Jim Correll, University of ArkansasSteven Koike, University of California Cooperative ExtensionYet another new race of downy mildew (Peronospora farinosa f. sp. spinaciae) on spinach has been identified in California’s Salinas Valley. The type, or original, strain was initially designated as UA2209 and was first detected in May 2009. Subsequently, it was found in an increasing number of locations throughout California in 2009 and 2010. This race breaks the resistance of several...
]]> Thu, 03 Mar 2011 08:32:50 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4323&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4323 Seedcorn Maggot, a Serious Pest of Winter and Spring Vegetables ]]> Fri, 25 Feb 2011 10:17:22 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4301&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4301 First Generation of Lygus Nymphs is Hatching in Second Year Strawberries in the 2011 Production Season ]]> Tue, 15 Feb 2011 16:20:02 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4239&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4239 Winter White Mold Affecting Vegetable Crops Article submitted by: Steve Koike, Plant Pathology Farm AdvisorUniversity of California Cooperative ExtensionMonterey County White mold disease, caused by the fungus Sclerotinia sclerotiorum, is causing damage to a number of vegetable crops in California and Arizona during the late 2010 and early 2011 months. On the coast of California, white mold is being found on crucifer crops such as broccoli and cauliflower. In the desert regions white mold is causing damage on broccoli, cauliflower,...
]]> Fri, 21 Jan 2011 11:29:30 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4056&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=4056 Looking Ahead: Head Rot can be Issue for Winter and Early Spring Broccoli Article submitted by: Steve Koike, Plant Pathology Farm AdvisorUniversity of California Cooperative ExtensionMonterey County Experienced growers, pest control advisors, and other field professionals involved with broccoli already know that the winter period can signal increased problems due to head rot (also known as pin rot). Favored by cool temperatures and prolonged periods of moisture from rain, dew, and fog, broccoli head rot continues to be a damaging and yield-reducing factor because...
]]> Wed, 01 Dec 2010 16:28:59 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=3861&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=3861 New Regulations Proposed Will Affect Nutrient Management of Leafy Green Vegetables Article submitted by:Richard Smith, Vegetable Crop and Weed Science Farm AdvisorThe draft Agricultural Order issued by the Central Coast Regional Water Quality Control Board (CCRWQCB) on November 19 increased the regulation of discharges of nitrate-nitrogen to surface and ground water from agriculture.   As written, all vegetable operations that produce over 1000 acres of lettuce, cole and several other ‘high risk’ crops and that use chlorpyrifos or diazinon are placed into Tier 3 compliance...
]]> Tue, 30 Nov 2010 16:58:50 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=3847&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=3847 Tomato Spotted Wilt Virus Hitting Lettuce Crops Article submitted by: Steve Koike, Plant Pathology Farm AdvisorUniversity of California Cooperative ExtensionMonterey County As the coastal California lettuce crop heads into the ending fall season and as the inland county region initiates its fall lettuce cycle, both crops are being affected by Tomato spotted wilt virus (TSWV). Diseased plants have leaves with irregularly shaped, brown to dark brown lesions and dead (necrotic) areas (Photo 1); this necrotic tissue can resemble burn damage...
]]> Wed, 27 Oct 2010 11:23:09 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=3688&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=3688 Weed Science and Plant Pathology Meetings in November 2010 ]]> Mon, 11 Oct 2010 11:43:07 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=3582&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=3582 Calcium Deficiency Disorders Hit Vegetable Crops in Central Coast Article submitted by: Steven Koike, Plant Pathology Farm Advisore and Richard Smith, Vegetable Crop and Weed Science Farm AdvisorUniversity of California Cooperative ExtensionMonterey County In the months of July and August of 2010, a number of vegetable crops in California’s central coast were affected by calcium deficiency disorders. Usually referred to as “tipburn” (except in the case of celery, for which the disorder is called “blackheart”), these problems are often triggered by...
]]> Fri, 17 Sep 2010 15:26:56 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=3407&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=3407 Curly Top Disease Occurring on Coastal Tomato and Pepper Article submitted by:Steve Koike, Li-Fang Chen, Bob GilbertsonUniversity of California Cooperative ExtensionIn spring and summer of 2010, plants in some tomato and pepper fields in coastal California have developed virus-like symptoms. Affected plants were found in both Monterey and San Benito counties, though disease incidence was low. Samples submitted to the Gilbertson lab at UC Davis tested positive for the curly top virus, indicating that these symptoms were due to curly top...
]]> Thu, 02 Sep 2010 16:56:13 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=3352&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed larriaga@ucdavis.edu(Lennis Arriaga) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=3352