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/ Thu, 12 Nov 2009 15:53:05 PST Thu, 12 Nov 2009 15:53:05 PST The following is a summary of further comparisons of baiting techniques for the spotted wing drosophila Drosophila suzukii.  Previous posts have evaluated the use of various fruit purees and other mixes and these have determined that a mixture of one 2.5 oz packet of yeast + 4 teaspoons sugar + 12 ounces of water distributed in four or five Mason jars were very effective in monitoring and evaluating infestation levels of spotted wing drosophila.Another test of baits was run last week.  Traps (a......
]]> Thu, 12 Nov 2009 15:53:05 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1985&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1985 One of the most obvious manifestations of calcium deficiency in strawberry is “tip burn” of the rapidly growing new leaves in the center of the plant.  Some varieties tend to manifest this symptom more than others.  Calcium is an important structural of component of cell walls and cell membranes in plants.  A deficiency of calcium in the plant leads to a general collapse of membrane and cell wall structure, and the resulting leakage of polyphenols concludes with necrosis in the affected areas. ......
]]> Tue, 13 Oct 2009 14:21:39 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1874&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1874 A new website is available on the world wide web from University of California Cooperative Extension in Santa Cruz County.  It is a one stop site where farm owners and managers can access quality research based information to assist with business and marketing decisions and success.  It is a fantastic resource, well designed and very easy to navigate: http://ucce.ucdavis.edu/farmbusinessandmarketplace/... Thu, 10 Sep 2009 09:50:30 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1733&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1733 Previous posts have written about the use of chemical sprays or baits to control the recent onslaught of spotted wing drosophila, but growers should know that they have another very powerful tool in managing this pest: enhanced field sanitation. Since spotted wing drosophila lays eggs in and develops in fruit (see photo #1 below), physical removal of the fruit from the field, either by harvest or discarding, will also remove the ability of the fly to reproduce and increase in number. ......
]]> Thu, 03 Sep 2009 16:15:59 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1710&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1710 The following is the summary of results of a recent pesticide efficacy trial to control spotted wing drosophila (SWD) in raspberries.  All materials in the test are registered for caneberries and have a one day pre-harvest interval.Treatments: Chemical Treatment Rate per acre Water Carrier Rate per acre Mustang rotated with Malathion 4 fl oz  rotated with 64 oz 179 gallons Malathion 64 fl oz 179 gallons Entrust 2 oz 179...... Wed, 02 Sep 2009 17:51:14 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1704&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1704 It is becoming increasingly evident that monitoring for spotted wing drosophila (SWD) is an integral part of a program to manage this fly to non-damaging levels.  Growers who are aware early on that SWD has entered their field maintain a wider range of options than those who suddenly find themselves confronting a very heavy infestation with a lot of infested fruit. Recall from the previous post that an interest in alternatives to GF120 Fruit Fly bait being used as a trap, either because of a......
]]> Wed, 02 Sep 2009 15:24:57 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1702&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1702 There has been significant discussion as of late as how to best trap for spotted wing drosophila, Drosophila suzukii. As a very small and mobile insect, detection and estimates of population can be challenging. Although spotted wing drosophila lays eggs in yet unripe fruit, it is attracted to fermenting fruit to feed and thus this can be a useful medium for trapping.  Additionally, there are several commercial formulations of fly trapping solutions. This past week, the following materials......
]]> Fri, 14 Aug 2009 18:41:56 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1631&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1631 There will be a meeting held in San Martin, California concerning the spotted wing drosophila.  The meeting is open to all who are interested, please refer to the following agenda: http://awqa.org/attachments/spotted_wing_09.doc... Mon, 27 Jul 2009 16:02:28 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1560&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1560 Several strawberry growers have identified a consistent pattern to spotted wing drosophilid infestation in strawberry.Spotted wing drosophilid apparently lays eggs beneath the skin of the fruit, and after a few days the eggs hatch.  As the larvae develop, a soft area at the area of infestation develops.  There is no hole apparent in the fruit, see close up in first photo below, but the bruise and softening are quite apparent, and many pickers should be able to identify these fruits as culls.On......
]]> Sun, 26 Jul 2009 15:22:47 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1556&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1556 This a brief summary of the information presented at yesterday’s meeting in Stockton about the cherry vinegar fly, now known as the spotted wing drosophila (SWD), Drosophila suzukii. The purpose of the meeting was to update researchers, growers and industry personnel on the status of this pest. Spotted wing drosophila has now been found in cherries, raspberries, blackberries, blueberries, and strawberries in California. It has been found in many (I think the number was 21) counties......
]]> Thu, 09 Jul 2009 09:40:19 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1483&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1483 Under current regulatory pressure for eradication of light brown apple moth, local caneberry growers have been striving to maximize leafroller control to the greatest extent possible. The pesticide Confirm 2F, which has excellent efficacy on leafrollers while having little activity on non-lepidopterous insects, has become a point of interest. It is worth the while to discuss the use of this material, along with a comparison to the related, but unregistered in caneberries, Intrepid 2F....... Sat, 04 Jul 2009 11:31:58 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1465&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1465 The recent infestation of local crops by the cherry vinegar fly, Drosophila suzukii, is serious. Vinegar flies normally are associated with rotting and over-ripe fruit and have not been thought of as being anything beyond a nuisance. However, the cherry vinegar fly is different from other vinegar flies in that lays eggs into fruit which are yet to be harvested. The larvae then feed within the fruit and exit to pupate. The feeding of the larvae, while damaging in itself, also exposes the...... Sat, 20 Jun 2009 09:13:26 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1421&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1421 The following is in regards to an infestation of light brown apple moth (LBAM) causing economic (approximately 20% or greater loss) damage in blackberries. This occurred in a single field several weeks ago, and has since been addressed by the grower and regulatory agencies. This information is being provided in the interest of emphasizing to the grower community that this pest is not only a regulatory problem now, but is capable of becoming an economic problem as well. It is imperative then......
]]> Thu, 04 Jun 2009 08:01:34 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1359&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1359 The following refers to trap counts taken on June 2 of Drosophila suzukii, previously (incorrectly) identified in this post as Drosophila biarmipes. Several raspberry fields have fairly high counts of D. suzukii now. One in the vicinity of Peckham Rd and another on Riverside Rd have counts in excess of 50 D. suzukii males (identified by the spots on the back of each wing) per trap, numbers which would be consistent with some fruit damage. Another raspberry planting on Thompson Rd also has...... Wed, 03 Jun 2009 09:39:46 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1351&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1351 It is very important to know that what has been identified in this blog as Drosophila biarmipes in this post is actually Drosophila suzukii. From this point on, all posts referring to the new species of vinegar fly will refer to Drosophila suzukii....
]]> Mon, 01 Jun 2009 17:31:52 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1345&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1345 Lately there has been some concern about leafrollers in raspberries, so it is important first for growers to know how to identify what a leafroller looks like in order to make correct pest management decisions. Leafrollers are generally true to their name, meaning they will roll leaves up to form a shelter with a whitish webbing. They will also form shelters between several leaves, growing points of plants, developing flowers and fruit. This is a sure way to distinguish leafroller larvae......
]]> Thu, 28 May 2009 12:10:04 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1332&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1332 Strawberries, raspberries, blueberries and blackberries grown in Santa Cruz and Monterey Counties host a number of tortricid, or leafroller, species, most common of which is the orange tortryx, Argyrotaenia franciscana. Adult orange totryx are active in early spring and all stages are present pretty well through the season. Larval feeding can damage flowers, developing green fruit and sometimes larvae will tunnel into ripe fruit. During picking, some orange tortryx larvae can become......
]]> Tue, 26 May 2009 17:33:47 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1323&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1323 Please be aware that the Monterey Bay Academy Field Day will take place this coming June 19. Click the link below to access the agenda: http://ucanr.org/mbameeting Don't miss this one!... Tue, 19 May 2009 16:21:51 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1303&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1303 The Annual UC Strawberry (Pomology) Field Day will be held Tuesday, May 5 at the UC Watsonville Strawberry Research Facility on Dairy Rd. Please following the link below for the agenda and more information regarding this meeting: http://groups.ucanr.org/UC_STRAWBERRY/... Tue, 21 Apr 2009 15:20:11 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1208&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1208 The use of carfentrazone (Shark) has recently become popular for suppression of primocanes in raspberry. It is a good option for growers because it is substantially less expensive than the standard hand pruning and also a lot safer and more effective than gramoxone (Paraquat). It is worth the while to review the application of Shark in caneberries. As an herbicide, Shark must be applied differently from other pesticides in raspberries to reduce the risk of damage (see photos below) to the......
]]> Fri, 03 Apr 2009 11:52:28 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1158&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1158 This article will discuss the redberry mite in blackberries, as the time to begin operations for its control is rapidly approaching. Redberry mite is a serious pest of commercially produced blackberries in Santa Cruz and Monterey counties in California. Redberry mite activity prevents berries from ripening uniformly, causing from one to many druplets to remain as a bright red cluster on the otherwise black and fully ripe fruit. Affected druplets never do ripen, causing the entire fruit......
]]> Fri, 13 Mar 2009 08:27:46 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1088&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1088 Blackberry growers should note that the moderate rains taking place in ambient temperatures of 65 to 75 degrees F as they are now are excellent conditions for outbreaks of downy mildew. The most recent outbreak was in the spring of 2005 and resulted in significant yield reductions on susceptible varieties. Downy mildew is caused by the fungal pathogen Peronospora sparsa. This pathogen infests almost all of the proprietary blackberry varieties, Ollalieberry, and is devastating to......
]]> Tue, 03 Mar 2009 10:38:50 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1053&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1053 With the potential of the new fruit fly, Drosophila biarmipes, to become a problem in the Watsonville- Salinas fruit production district, it is important for growers to know what they might do to control it. The pesticides Malathion and Pyganic offer a measure of control against adult flies, and will need to be applied frequently, meaning once every week to 10 days. Another pesticide which has been used with significant success in other areas of the country suffering fruit fly......
]]> Tue, 10 Feb 2009 10:12:26 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1005&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=1005 Please be informed that this year's Annual Strawberry Production Meeting for the Central Coast will be held on February 5 at the Elk's Lodge in Watsonville, the same place as last year. Follow the link below for the announcement and agenda: https://ucanr.org/sitebuilder/filegroups/calendar26-Jan-09-1643/11711.pdf... Tue, 27 Jan 2009 09:12:56 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=960&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=960 Raspberry sawfly, Monophadnoides geniculatus, is an uncommon pest in raspberries on the Central Coast of California. I recently had a question concerning this pest, so it something worth discussing. Raspberry sawflies are not flies, but actually wasps. The larvae, since they are fixed on the leaves and damage them, draw our attention as pests. Larvae are usually found on leaf undersides, are ½ of an inch long, light green in color, and have a brown stripe down the back. Larvae......
]]> Fri, 05 Dec 2008 12:01:03 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=853&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=853 During the last two months, this office has had many samples of strawberry and raspberry fruit infested with fruit fly larvae submitted. What has been notable about this species of fruit fly is that it is infesting maturing fruit, rather than over-ripe and rotten fruit, as is the case with the vinegar fly that we are all accustomed with.   These new fruit flies found this fall have been found in very high numbers in strawberry and caneberry fields northeast of Watsonville.   The new species......
]]> Fri, 21 Nov 2008 12:25:13 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=821&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=821 ... Mon, 10 Nov 2008 16:32:38 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=791&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=791 There has been recently a spate of questions about freeze injury in strawberry transplants, so this is a topic which merits some discussion. The freeze damage seen in transplants has been in the crown. The crown of strawberry (which is actually a shortened stem) is composed of several parts. The central part of the crown is called the pith and is made up of parenchyma cells. In plants, parenchyma cells serve to fill up the space between more specialized cells. Surrounding the pith are......
]]> Sun, 09 Nov 2008 09:29:55 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=785&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=785 Cold conditioning, or chill requirement, is an essential part of growing and producing strawberries in California. The chilling requirement is defined as being the cumulative period, usually measured in number of hours below a certain temperature, which is needed to produce the internal changes in the strawberry plant that result in the normal sequence of growth following winter dormancy. In strawberries, hours accumulated of temperatures between 28 and 45 degrees Fahrenheit are considered to...... Thu, 16 Oct 2008 09:51:24 PST http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=722&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed mpbolda@ucdavis.edu(Mark Bolda) http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=722