Hello Peter, We have had only a few years to have gained experience with SWD, but what we have learned has not often lined up well with the pre-2008 literature. We have learned that this is a pest that we need to take seriously, especially so far, the berry and cherry industries.
SWD gets through our eastern Oregon and Washington winters very well, especially if they are milder than usual. Below zero F seems to slow the problems in the next spring. We were hoping that they would die out every winter and would have to fly over from Western Washington and Oregon every spring, that didn't turn out to be the case. Temperatures in the winter of 2012 -- 2013 didn't get much below 12 to 14 F. Despite catching relatively few adults in the orchards this year, we continued to have significant fruit infections in some cherry orchards. There doesn't seem to be a good correlation between trap catch and percent fruit infection. Timothy Smith Regional Extension Specialist Washington State University Wenatchee From: apple-crop-boun...@virtualorchard.net [mailto:apple-crop-boun...@virtualorchard.net] On Behalf Of Peter J. Jentsch Sent: Sunday, July 14, 2013 6:04 PM To: Apple-crop discussion list Cc: jon.cleme...@umass.edu Subject: Re: [apple-crop] Stone fruit SWD injury Dean, A Penn State Extension Article on SWD Natural History summaries and references studies on basic biology of the insect found at http://pubs.cas.psu.edu/freepubs/pdfs/xj0046.pdf. Here's a quote from the article that discusses aspects of temperature on insect biology. "SWD prefers environments with moderate temperatures and high humidity. Adults are most active at temperatures around 70°F, and their activity is greatly decreased when temperatures are only 15 degrees colder or warmer." Adults need shelter when temperatures drop below about 50°F and begin hibernation at 40°F. Female adults exposed to cold temperatures lay very few eggs, and the eggs and larvae are killed by several days of exposure to temperatures just above freezing. Thus, seasonal populations are likely to start out extremely low in each spring, increase as temperatures warm, decline during hot spells, and then increase very rapidly during early fall when temperatures become more ideal. Regardless of whether SWD can overwinter in a region, it can be readily reintroduced in fruit that is shipped from warmer regions. Peter J. Jentsch Senior Extension Associate - Entomology Department of Entomology Cornell University's Hudson Valley Lab P.O. Box 727, 3357 Rt. 9W Highland, NY 12528 Office: 845-691-7151 Cell: 845-417-7465 FAX: 845-691-2719 E-mail: p...@cornell.edu<mailto:p...@cornell.edu> http://hudsonvf.cce.cornell.edu/bmsb1.html http://web.entomology.cornell.edu/jentsch/links.html ________________________________ From: apple-crop-boun...@virtualorchard.net<mailto:apple-crop-boun...@virtualorchard.net> [apple-crop-boun...@virtualorchard.net] on behalf of Dean Henry [d...@berrypatchfarm.com] Sent: Sunday, July 14, 2013 8:40 PM To: Apple-crop discussion list Cc: jon.cleme...@umass.edu<mailto:jon.cleme...@umass.edu>; Apple-crop discussion list Subject: Re: [apple-crop] Stone fruit SWD injury Are there any clues from temperature effects on egg laying? I read that the swd has preference, thus the need for trap location in shade. Do they oviposit daytime or night? Regards, Dean, Sent from my iPad On Jul 14, 2013, at 6:59 PM, "Peter J. Jentsch" <p...@cornell.edu<mailto:p...@cornell.edu>> wrote: We sampled a range of peach varieties maturing at different dates throughout the season last year. Although we did see one sample with a single adult SWD emerge from incubated sound fruit held for two weeks, we didn't see what we would consider to be economic injury, again the caveat being, 'of sound fruit'. However, damaged fruit from suture splits, bird pecks, insect damage from earwigs or Japanese beetle to create openings in the skin are a different matter. In these cases SWD will infest fruit as do other Drosophlia sp. A few of our growers thought the fly was causing increased brown rot in peaches but we didn't find SWD emergence evidence to support the claim. Certainly that could be the case in late cherry with reduced fungicide use. We did see late cherry varieties in the lower HV with significant egg laying injury this year in a site where SWD was captured in low numbers. One monitored site in Dutchess County in early July suffered 100% ovipositional injury. A second site in Orange County experienced 70% ovipositional injury during the first week of July. However, we have yet to rear out adults from these samples. This year in the Hudson Valley, as in most monitored sites throughout the region, we did capture flies earlier then in 2012, possibly because of the addition of yeast/sugar combination floating in apple cider vinegar (ACV) or simply because we were looking more intensely. We'll need to again collect stone fruit and grape varieties as the season progresses to determine varietial susceptibility to SWD. No injury was observed in plums, pear or apple last season but by September you could capture them in any fruit growing site in the Northeast. Chris Meier even caught flies at the NY, Canada New England Fruit Workers meeting in a remote wooded location in Burlington !! Peter J. Jentsch Senior Extension Associate - Entomology Department of Entomology Cornell University's Hudson Valley Lab P.O. Box 727, 3357 Rt. 9W Highland, NY 12528 Office: 845-691-7151 Cell: 845-417-7465 FAX: 845-691-2719 E-mail: p...@cornell.edu<mailto:p...@cornell.edu> http://hudsonvf.cce.cornell.edu/bmsb1.html http://web.entomology.cornell.edu/jentsch/links.html ________________________________ From: apple-crop-boun...@virtualorchard.net<mailto:apple-crop-boun...@virtualorchard.net> [apple-crop-boun...@virtualorchard.net<mailto:apple-crop-boun...@virtualorchard.net>] on behalf of Arthur Kelly [kellyorcha...@gmail.com<mailto:kellyorcha...@gmail.com>] Sent: Sunday, July 14, 2013 2:24 PM To: jon.cleme...@umass.edu<mailto:jon.cleme...@umass.edu>; Apple-crop discussion list Subject: Re: [apple-crop] Stone fruit trunk painting Two growers in this area say they had some damage from SWD on peaches last year. On Sun, Jul 14, 2013 at 1:53 PM, Jon Clements <jon.cleme...@umass.edu<mailto:jon.cleme...@umass.edu>> wrote: I wonder with Spotted Wing Drosophila if we are going to have to be more careful letting peaches fully "tree-ripen?" :-) On Sun, Jul 14, 2013 at 1:47 PM, Arthur Kelly <kellyorcha...@gmail.com<mailto:kellyorcha...@gmail.com>> wrote: We are in the mid-80's here Jon. We expect to be in the 90's tomorrow. We are starting blueberry (Duke) harvest tomorrow. We should start peach harvest on the 25th-27th with PF 1, PF 5B and Earlystar with Garnet Beauty to follow. Last year we picked PF 1, PF 5B and Earlystar all on the first day of harvest. We might have been a day or two too late on the PF 1. We try to harvest so you can eat them tomorrow. It can be touchy. Maturities seem to sometimes not be what we expect from catalogues and other literature. Art Kelly On Sun, Jul 14, 2013 at 12:27 PM, Win Cowgill <cowg...@njaes.rutgers.edu<mailto:cowg...@njaes.rutgers.edu>> wrote: I know of no data on joint compound for lesser or greater peac borer control. Win Win Cowgill Editor Horticultural News Professor and Area Fruit Agent New Jersey Agricultural Experiment Station Rutgers Cooperative Extension PO Box 2900 314 State Route 12, Bldg. 2 Flemington, NJ 08822-2900 Office 908-788-1339<tel:908-788-1339> Fax- 908-806-4735<tel:908-806-4735> Email: cowg...@njaes.rutgers.edu<mailto:cowg...@njaes.rutgers.edu> www.horticulturalnews.org/<http://www.horticulturalnews.org/> www.virtualorchard.net/<http://www.virtualorchard.net/> http://virtualorchard.net/njfruitfocus/index.html www.snyderfarm.rutgers.edu/investigators/cowgill.html<http://www.snyderfarm.rutgers.edu/investigators/cowgill.html> www.appletesters.net<http://www.appletesters.net> On Jul 14, 2013, at 11:17 AM, Arthur Kelly <kellyorcha...@gmail.com<mailto:kellyorcha...@gmail.com>> wrote: It seems like past discussions indicated that adding the joint compound helped repel borers. What do you think? Art Kelly Kelly Orchards Acton, ME On Sun, Jul 14, 2013 at 10:45 AM, Kurt W. Alstede <k...@alstedefarms.com<mailto:k...@alstedefarms.com>> wrote: Gentlemen: Please find below our top secret recipe. We have never had any adverse effects from exterior paint...in fact we add the fungicide to help protect the tree against wounds and the thiram acts as a rodent repellent. We use the cheapest white exterior paint that we can find and generally spray it on as a white wash with a handgun from the bottom twelve inches of the scaffold limbs to the ground. Hope that this helps. PEACH TREE PAINT RECIPE. 1 GAL WHITE EXTERIOR LATEX PAINT 2 GAL WATER. ( 1 PART PAINT X 2 PARTS WATER ) ½ POUND OF THIRAM PER GALLON OF WHITEWASH. 2 TABLESPOONS OF TOPSIN-M PER GALLON OF WHITEWASH. MIX WHITEWASH, AND ADD THIRAM AND TOPSIN-M. STIR THOROUGHLY. APPLY TO THE TREES WITH PAINT BRUSHES OR SPRAY GUN 12 TO 18 INCHES AFTER SCAFFOLDS WITH DAYTIME TEMPERATURES ABOVE 50 DEGREES F. Kurt W. Alstede General Manager, Alstede Farms, LLC P.O. Box 278 84 County Route 513 S. (Old Rt. 24) Chester, New Jersey 07930 United States of America Tel: 908-879-7189<tel:908-879-7189> Fax: 908-879-7815<tel:908-879-7815> www.alstedefarms.com<http://www.alstedefarms.com/> From: apple-crop-boun...@virtualorchard.net<mailto:apple-crop-boun...@virtualorchard.net> [mailto:apple-crop-boun...@virtualorchard.net<mailto:apple-crop-boun...@virtualorchard.net>] On Behalf Of Arthur Kelly Sent: Sunday, July 14, 2013 8:46 AM To: Apple-Crop Subject: [apple-crop] Stone fruit trunk painting Does anyone know the recipe for trunk painting including joint compound? _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.net<mailto:apple-crop@virtualorchard.net> http://virtualorchard.net/mailman/listinfo/apple-crop _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.net<mailto:apple-crop@virtualorchard.net> http://virtualorchard.net/mailman/listinfo/apple-crop _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.net<mailto:apple-crop@virtualorchard.net> http://virtualorchard.net/mailman/listinfo/apple-crop _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.net<mailto:apple-crop@virtualorchard.net> http://virtualorchard.net/mailman/listinfo/apple-crop -- Jon Clements aka 'Mr Honeycrisp' UMass Cold Spring Orchard 393 Sabin St. Belchertown, MA 01007 413-478-7219<tel:413-478-7219> umassfruit.com<http://umassfruit.com> _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.net<mailto:apple-crop@virtualorchard.net> http://virtualorchard.net/mailman/listinfo/apple-crop _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.net<mailto:apple-crop@virtualorchard.net> http://virtualorchard.net/mailman/listinfo/apple-crop
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