http://ucanr.org/blogs/strawberries_caneberries/?utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed Blog will discuss current issues and topics of general interest in strawberries and caneberries en-us UC ANR http://cyber.law.harvard.edu/rss/ Sat, 05 May 2012 09:27:46 PST Sat, 05 May 2012 09:27:46 PST UC ANR The pictures below are of a species of sap feeding beetles (Family Nitidulidae) found in one section of a local strawberry field. This case of these insects is pretty interesting simply because they are so uncommon to find in Watsonville. Conditions of discovery are the following. The location is a beautiful strawberry field full of big fruit, bordered by apples and blackberries. It is only the five or six rows bordering the apples and blackberries that have these sap beetles.The beetles...
]]> Sat, 05 May 2012 09:27:46 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7429&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7429 This comes up a couple of times every year so it is worth reviewing and certainly adds value to our catalogue of plant disorders on these berry blogs.The following plant sample of a proprietary variety was received 4/24/2012.  One can see immediately that the leaves are chlorotic and burnt at the margins and in some cases (photo 2 below) newer leaves are somewhat deformed as well.  Most often one will encounter a pink tint to many of the leaves.The situation in the field was as follows, a...
]]> Fri, 27 Apr 2012 17:13:34 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7362&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7362 Here is another example of orange rust, which are caused by two fungi, Arthuriomyces and Gymnoconia, the two of which are distinguished by the shape of their spores and life cycle length.  To re-iterate, growth of orange rust is strictly on blackberry and is favored by cooler temperatures and high humidity, but I have yet to see an infection of this rust explode across the landscape no matter what the conditions are.  Instead, several plants around a single locus will show infection at one time...
]]> Tue, 17 Apr 2012 15:44:24 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7277&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7277 Some points to ponder on a rainy few days regarding phosphorous fertility in strawberries. Since the work described below was conducted both years in a soil of or above 80 ppm phosphorous, we can’t define where the agronomic threshold for crop response from additional phosphorous lies and subsequently can’t publish in a peer reviewed journal.  Subsequently this is not meant to be a guide for phosphorous fertility in California strawberries.  Nevertheless, since many of the soils we farm are...
]]> Fri, 13 Apr 2012 14:11:44 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7247&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7247
]]> Thu, 05 Apr 2012 16:38:26 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7211&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7211 I have an update on the strawberry field described in the January 6 post of this blog suffering extensive salt damage .As you may recall, the determination on finding all of that salt damage was to immediately overhead irrigate to wash the accumulated salts away from the plant roots, and the grower did indeed do that already on the next day as shown in the first photo below.As the reader can see from the second and third photos below, the recovery of this field is now near complete.  The plants...
]]> Thu, 05 Apr 2012 14:42:40 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7209&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7209 The pictures below are of a farm call this morning concerning die back of laterals of maybe less than 1% of the total on blackberry.  The symptoms occurred fairly evenly across the farm without regard to inside or outside of tunnels, organic or conventional. As one can see from the second picture below, the die back does not advance that far down into the lateral, and since the apical dominance has been pushed down from the tip, often a new branch can be found at the lower limit of the...
]]> Fri, 23 Mar 2012 16:30:39 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7103&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7103 One of the points of curiosity of spotted wing drosophila is that while most everyone refers to the high fecundity of the female and her ability to lay so many eggs, have you given a lot of thought as to how such a small fly has the capacity to produce so many eggs?Well thanks to the work of Katrina Hunter of UCSC and my research assistant Monise Sheehan, we have a better idea.  Simply put, and graphically illustrated below by cutaways, the abdominal cavities of these adult females are...
]]> Wed, 14 Mar 2012 09:21:18 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7031&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7031 Mark Bolda, Laura Tourte, Rich De Moura and Karen Klonskyof University of California Cooperative Extension have authored "Sample Costs to Produce Second Year Strawberries" which is now posted at:http://coststudies.ucdavis.edu/files/Strawberry2ndYrCC2011.pdfCultivation of second year strawberries (also known as "cut backs" or "renovations" by some) is a significant part of the strawberry industry on the Central Coast, currently covering some 15% of the total acreage.   This study, which took...
]]> Tue, 13 Mar 2012 17:14:20 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7027&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=7027 It has been more than 30 years since UC published strawberry leaf nutrient diagnostic guidelines (Publication 4098, ‘Strawberry deficiency symptoms: a visual and plant analysis guide to fertilization’, released in 1980).  In the years since that publication, varieties, production practices and yield expectations have changed considerably.  In 2010 we began a project, funded by the California Strawberry Commission, to reevaluate leaf and petiole nutrient sufficiency ranges for day-neutral...
]]> Mon, 05 Mar 2012 15:02:19 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6958&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6958 It's official.  As of March 8, the Federal Order will be revised to reflect that blackberries and raspberries are no longer on the regulated host list for European grapevine moth.  What this means to you as person working in caneberries is that from here on out you will not be inspected for European grapevine moth.  The link to the revised Federal Order is below:http://www.aphis.usda.gov/plant_health/plant_pest_info/eg_moth/downloads/spro/DA-2012-07.pdfAs stated before in this space, Canada is...
]]> Thu, 01 Mar 2012 14:47:11 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6929&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6929
]]> Tue, 28 Feb 2012 15:15:30 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6912&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6912
]]> Tue, 07 Feb 2012 10:54:35 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6778&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6778 A few things that growers and field people might being seeing this time of year in strawberry plants.Salt Toxicity: By far the biggest issue so far in 2012 has been salt damage.  This issue is well described in the January 6 post, but a photo is included below for the sake of comparision with the other disorders.  To re-iterate, most notable characteristic of salt damage is the burnt margins of the leaves, especially on the more developed leaves.  Photo 1 below.Fumigant Toxicity: Fumigation...
]]> Tue, 17 Jan 2012 14:10:22 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6588&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6588
]]> Fri, 13 Jan 2012 16:22:08 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6608&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6608
]]> Mon, 09 Jan 2012 09:15:41 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6546&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6546 Happy New Year everybody. Unfortunately, we start out the year with some concerns. We want to alert growers that early in 2012 we are seeing transplant decline and dieback in various fields in the Watsonville-Salinas production district. As pictured below (Photo 1), this problem can be quite severe and characteristically affects a large percentage of the field. From what we have seen and heard from others, along with samples submitted to the UCCE disease diagnostics lab in Salinas, this...
]]> Fri, 06 Jan 2012 16:10:44 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6538&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6538 In a conversation with a Pest Control Advisor colleague the other day, we discussed the merits of lime sulfur applications in the fall on blackberries grown in the Pajaro Valley.  This is something I have spent considerable time thinking about and have come around to believe, that while not completely supported by empirical evidence, fall application of lime sulfur might not be necessary in our blackberries and is to some extent an artifact of past varieties and practices.  Here is why I...
]]> Wed, 16 Nov 2011 09:02:53 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6200&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=6200 The hot weather of this past week has unsurprisingly caused a certain amount of sunscald on caneberry fruit.   As can be seen in the photos below, sunscald manifests itself as a white to brown discoloration of one or more of druplets on mature and immature fruit. The current round of sunscald has accompanied the hot spell of the past three days, and this is consistent with what we have witnessed in the past.  Any time on the Central Coast that we go from fairly steady temperatures in of 70oF...
]]> Fri, 14 Oct 2011 12:30:47 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5966&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5966 There is a stream of thought currently in the Watsonville- Salinas strawberry production district of gaining advantage with earlier plant establishment this year by dramatically reducing the amount of supplemental chill, which is the cold storage of transplants following harvest, for the day neutral varieties ‘San Andreas’ and ‘Monterey’.  This might stem from reports that a number of growers in Santa Maria did well in the 2010-2011 production season with a single day of supplemental chill, and...
]]> Mon, 26 Sep 2011 09:34:08 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5844&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5844