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/ Tue, 07 Feb 2012 14:14:05 PST Tue, 07 Feb 2012 14:14:05 PST UC ANR
]]> 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 A rather thorough presentation of one year’s worth of work on spotted wing drosophila was made at the big entomology meeting on September 13. As this presentation will not be posted anywhere, the following will be a summary of the work and what we know so far, along with some pointers that may be useful for growers to follow in their efforts to control this pest. Along with various private industry efforts, the work that is being done right now by UC Davis and UCCE on spotted wing drosophila...
]]> Wed, 21 Sep 2011 17:01:39 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5823&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5823 On occasion, we do run across ideas on how to improve our current efforts in developing a decent control regime for the spotted wing drosophila.The use of sake ("rice wine", correctly pronounced as sa-KKE, not saki) as a trapping medium is one of those ideas.  Initially mentioned in the groundbreaking Kanazawa paper from the 1930's, it was also the subject recently of a short program on NHK (Japan Broadcasting Corporation) on managing vinegar and other flies in the household.With the generosity...
]]> Wed, 31 Aug 2011 10:48:37 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5656&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5656
]]> Wed, 24 Aug 2011 15:12:31 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5602&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5602 As many Central Coast caneberry growers know, this summer season has seen an astonishing number of lygus bugs in blackberries.  Counts of 10 to 20 lygus bugs per shake easily rival the heaviest infestations in strawberry. However, contrary to the “catfacing” or misshapen fruit left by lygus activity in strawberry, there does not seem to be a documented type of damage from lygus in blackberry.  All the same, customers have been getting tetchy about having bugs in their baskets of fruit, so it...
]]> Wed, 24 Aug 2011 08:01:58 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5593&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5593 It was perhaps only inevitable that some laboratory work with a private industry researcher has discovered a high level of tolerance, maybe even resistance, to the popular organically registered pesticide Pyganic  (active ingredient pyrethrin) in spotted wing drosophila.  Using the system of Petri plates photographed below, groups numbering from 15 to 22 flies were subjected to the label rate (18 fl oz) and twice the label rate (36 fl oz) of Pyganic 5.0 II with the result that spraying them had...
]]> Tue, 23 Aug 2011 11:59:53 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5585&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5585 It is at times perhaps tempting to take an uncomplicated view of nutrient deficiency in strawberry.  The mantra goes a little bit like yellow leaves are nitrogen deficient, phosphorous deficiency is given by purple leaves, potassium shortages easily marked by scorched leaves and so on. I don’t believe any of this is so simple and so attempt to challenge this facile thinking when I have the opportunity to do so. The following situation was a good one.  A smallish field of ‘Albion’ variety...
]]> Wed, 27 Jul 2011 17:42:34 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5404&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5404 There have been a few reports as of late concerning a rather abrupt wilting of blackberry plants in certain fields.  Some of these wilts have been found to be caused by raspberry crown borer, which merits a discussion of this pest in this space. Crown borer is actually simple to diagnose in the field.  One will notice a rather pronounced wilt of the plant, and a subsequent evaluation of the crown of the plant will find a hole there, usually with some sawdust like material deposited outside. ...
]]> Tue, 26 Jul 2011 12:04:46 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5384&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5384 I was taken to several raspberry fields today to investigate an unusual and rather concerning plant disorder.  As one can see from the pictures below, leaves were significantly yellowed, with an abrupt change without regard to leaf venation from yellow to green in many cases.  Some leaves had fallen off, and severely yellowed leaves fell off at the touch. Within the field of yellow, there were many spots of green.  The undersides of the leaf were showing the same, but with the addition of...
]]> Tue, 12 Jul 2011 17:46:16 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5319&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5319 Starting Friday and over the weekend, a number of area blackberry growers have reported high numbers of lygus bugs in their fields.  I checked on one field this morning, and indeed the level of infestation is astonishing. Somewhere in the area of ten early stage nymphs can fall out from a few shakes at a single spot at any number of points all across the field. This is without precedent in any type of berry and merits some thought and discussion.The field that was viewed this morning was in...
]]> Mon, 04 Jul 2011 20:32:29 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5250&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5250
]]> Sat, 02 Jul 2011 10:06:52 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5249&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5249 A few more comments on the situation with European grapevine moth in blackberries:1- European grapevine moth is a surprisingly small moth, as one can see from the picture below.  The larvae are also very small, so if you find a leafroller longer than a quarter inch in your blackberries, it is assuredly light brown apple moth or another leafroller and not European grapevine moth.2- More information on the slim possibility of blackberries as a true host of European grapevine moth.  Colleague...
]]> Fri, 24 Jun 2011 13:00:29 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5196&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5196 One of the less well understood issues in our industry on the Central Coast is the phenomenon of yellowing of strawberry plants in certain areas of the district, especially in a number of fields north of Salinas.  The following is meant to share what we have found out on this problem so far, and discuss some of my thoughts about the most probable cause. While there are many causes of yellowing in strawberry plants, for example lack of nitrogen, iron or zinc, the yellowing of strawberry plants...
]]> Tue, 21 Jun 2011 15:48:24 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5148&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=5148