Re: [apple-crop] wind chill
Hi Art Plants respond to ambient temperature and unlike warm blooded animals do not create their own. So wind chill does not affect them. Wind x temperature could have an effect on moisture relations within the plant, but I think that is not a major issue. At least that's my understanding of the situation. I know growers who are convinced that wind chill affects trees but that's not how I understand it. - Glen Glen Koehler University of Maine Cooperative Extension Pest Management Office Voice: Office 207-581-3882, Cell 207-485-0918 491 College Avenue, Orono, ME 04473 On Sat, Feb 13, 2016 at 9:53 PM, Arthur Kelly <kellyorcha...@gmail.com> wrote: > Does anyone have a handle on how wind chill relates to fruit bud critical > temps. We are expecting -11F tonight with a wind chill effect of around > -30 F. > > -- > Art Kelly > Kelly Orchards > Acton, ME > > ___ > apple-crop mailing list > apple-crop@virtualorchard.net > http://virtualorchard.net/mailman/listinfo/apple-crop > > ___ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop
Re: [apple-crop] {Disarmed} Re: Looking for comments on fire blight management
, 2015 11:22 AM *To:* Apple-crop discussion list apple-crop@virtualorchard.net *Subject:* Re: [apple-crop] Looking for comments on fire blight management A group of us wrote the article attached for the UMass/Rutgers publication Fruit Notes/New Jersey Horticultural News. *MailScanner has detected a possible fraud attempt from urldefense.proofpoint.com claiming to be* http://umassfruitnotes.com/v80n2/Cover802.html https://urldefense.proofpoint.com/v1/url?u=http://umassfruitnotes.com/v80n2/Cover802.htmlk=EWEYHnIvm0nsSxnW5y9VIw%3D%3D%0Ar=VR1vaGJPOzxhk9dUVIL5%2Bg%3D%3D%0Am=UfabeZAWBFZVVH4RygbVAxxf%2BYztNRlyB0BCPGgl9kE%3D%0As=6f16d747d2ee23b3be62b4005b0a579f17fdd4826d89fe8c7fc83eb8b4a9b1a6 The key point is that even in those years when fire blight doesn’t do much, and particularly the following year, people need to stay alert. Yes, fire blight can be kept at non-damaging levels, but it takes regular attention every year. This year in southern New England and the Hudson Valley, the two fire bight models, Maryblyt and CougarBlyt, alone or in NEWA, Ag-Radar and other decision support tools, shot off the charts warning of unprecedented fire bight risk. Growers in the region had experienced a bad year last year, and were generally ready to use strep early and often during bloom. Fire blight never really appeared at problematic levels. Much to our puzzlement, this was true even for trees that didn’t get strep treatments, leading us to wonder what was going on with the models and the disease. The best we have so far is that it was so dry during bloom in most areas that even though epiphytic populations of bacteria were tremendous, they never got washed into flowers to cause infection. Another possibility is that the extremely dry weather suppressed bacterial growth, something not taken into account in the models. Dan ___ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop -- Glen Koehler University of Maine Cooperative Extension Pest Management Office Voice: Office 207-581-3882, Cell 207-485-0918 491 College Avenue, Orono, ME 04473 ___ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop
[apple-crop] Looking for comments on fire blight management
Maine had two bouts of fire blight weather during bloom, one at very beginning and second at very end. I suspect that the rapid shift to hot days just before and leading into bloom (after slow cool period from bud break to pink) may have shocked the trees and resulted in more straggled bloom than usual. While we have not had an epic fire blight year comparable to what other states have experienced in other recent years, there seems to be a transition this year. Originally fire blight was not a disease that required attention in Maine. That era ended about 15 years ago. Then, fire blight used to be something that showed up in a few orchards in some years, usually but not always relatively minor extent. This year, it seems that most orchards have a little bit of fire blight. No devastating epidemics this year, but a lot more than growers want to see. Following is off the cuff reply to apple grower dealing with fire blight strikes that keep showing up in Paula Reds. He was wondering if he can ever dig his way back out of recurring fire blight infections. The fire blight has been in the block at low level for past 3-4 years and despite repeated, (though not always immediate) sanitation removal, it is back again this year. Still not at catastrophic level but it does seem to be increasing year to year. Rough guess is that this year 20-30% of Paula Red trees in the block are affected. Most with only one or two strikes, but a few with considerably more. Unfortunately I think the trees are on M26. Across Maine. there seems to be much more fire blight on Paula Red than other cultivars this year. Honeycrisp and Cortland in this same block hardly affected. I'm looking for comments. Did I miss any key points? Anything erroneous? I'm aware of kasugamycin and other alternative materials, but this wasn't the place for getting into that kind of detail. I don't think we have strep resistant E.a., should get some more samples tested though. Is two early season copper applications likely to be any more helpful than one? Post harvest copper make any sense? Thanks for your help, Glen ** Grower message: Fire blight looks like heck in the Paula Red’s! We are just cutting what we can and summer pruning. Is there no hope? Reply:It should slow down with trees ceasing terminal growth. I'm sure you have other things you'd rather be doing, but getting rid of the fire blight now will at least cut down work load later, and might be the thing that prevents further spread that gets to the point where you are looking at replacing trees. Copper every spring. Strep on hand so you can react quickly to blossom blight infection period forecast that you need to check daily because they can change so fast. Factor fire blight into cultivar and rootstock selection. Blossom removal on first year trees.Fertility management to prevent overly lush growth. Consider Apogee where appropriate to reduce shoot growth and thus shoot blight spread. Daily monitoring and removal of fire blight strikes starting a petal fall until end of August. Strep on hand in case hail or strong wind storm creates risk of fire blight spread (up until strep PHI gets in the way). Be careful that you don't mix summer pruning and fire blight removal. They should be handled as two separate jobs.I suspect it would be best to complete fire blight removal first. Summer pruning before fire blight removal will create open wound surfaces. Going in after to handle fire blight material could mobilize bacteria which can infect those wounds. Thus, better to remove fire blight before creating summer pruning wounds. Same thing applies to sucker removal. Thoroughly sterilize tools after using them for fire blight removal before using for anything else. Ugly stub pruning to allow winter removal of cankers created by sanitation cuts. Don't leave fire bight cuttings in the orchard as fire blight bacterial can remain active in dried ooze for 2 years. Burn, bury, or compost the fire blight cuttings. It is possible to work your way out of a moderate fire blight outbreak. But it can take an extended period of sanitation vigilance. There are no silver bullets. ** -- Glen Koehler University of Maine Cooperative Extension Pest Management Office Voice: Office 207-581-3882, Cell 207-485-0918 491 College Avenue, Orono, ME 04473 ___ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop
Re: [apple-crop] OBLR
Hi Art There is no OBLR pheromone trap treatment threshold that I know of. As Jon said, the traps are used for timing not threshold detection. That said, and with a big buyer beware cautionary note that we really can't extrapolate from one pest to another, I still find it informative to note that the MidAtlantic Orchard Monitoring Guide mentions three pheromone trap based thresholds for apple Lep pests: Codling moth (5 CM per week per trap), Tufted apple budmoth (roughly 15 TABM per trap per week based on Figure 11.1), and Lesser appleworm ( 5 LAW per trap per week, which is based on the CM threshold, so maybe we can extrapolate between pests!). The problem with using pheromone traps for thresholds is that the traps attract males and the pest population depends on number of females laying eggs, and the number of larvae of both sexes, neither of which may be very well correlated with male captures in pheromone traps. Add in the variability caused by trap placement, wind direction, flight temperatures etc., and it's not hard to see why pheromone traps are more useful as presence/absence detectors for timing degree day models to estimate optimum time for direct observation than for making population density measurements. When populations are low, I don't even trust pheromone traps that much as biofix detectors unless a large number of traps are used and are regularly checked. My concern there is that with a low population and an inefficient trapping system, the appearance of moths in the traps may be delayed past the date when emergence began. Thus it may be better to use both degree day model to estimate the adult emergence date or other biofix and trapping and compare them to decide which seems more realistic for setting biofix for subsequent degree day estimate to identify optimum sampling date. Of course, is the population is high, only the pheromone traps will indicate that. My guess is that 7.5 per trap is definitely enough to schedule time for making larval count, but not enough to lose sleep over until you get those scouting results. The threshold for larval observation is 3 infested terminals with living OBLR larvae per 100 terminals checked. The degree day estimate for start of OBLR flight at Sanford Ag-Radar site near you was June 18. Based on that, the optimum sampling date is July 11, with a July 15 followup if the first check is below threshold. ( I don't think the July 3 egg hatch date is relevant because your trap catch levels are not high enough to indicate convincing need for treatment, so better to wait for scouting observations.) I entered your June 20 biofix and that nudged the optimum scouting date to July 13 with July 17 followup. We'll make that part of the scouting visit that week, but we will only be able to do one check vs. the recommended two check protocol. - Glen On Tue, Jul 1, 2014 at 6:25 PM, Jill Kelly kelly...@metrocast.net wrote: Thanks Jon. On Jul 1, 2014, at 12:42 PM, Jon Clements wrote: Art, there is no threshold as far as I know. Pheromone traps are typically used to establish a biofix to time the best treatment. See: http://www.fruitadvisor.info/tfruit/clements/models/oblr.html According to AgRadar, you should be out spraying for this pest July 3 so you can relax on the 4th. But, your namesake tropical depression/storm/hurricane Arthur may have something to say about that too! http://pronewengland.org/AllModels/MEmodel/ME-Sanford-InsectDates.htm Jon On Mon, Jun 30, 2014 at 2:55 PM, Arthur Kelly kellyorcha...@gmail.com wrote: Is there a treatment threshold for pheromone trap captures for OBLR? We averaged 7.5/trap today. We trapped the first adults on 6/20, one per trap. -- Art Kelly Kelly Orchards Acton, ME ___ apple-crop mailing list 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 umassfruit.com ___ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop ___ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop -- Glen Koehler University of Maine Cooperative Extension Pest Management Office Voice: Office 207-581-3882, Cell 207-485-0918 491 College Avenue, Orono, ME 04473 ___ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop
[apple-crop] Glyphosate alternatives
A Maine apple grower is exploring alternatives to using glyphosate (e.g. Roundup etc.) for vegetation control in tree rows. The reason is concern about immediate and long term effect of glyphosate drift onto trunks. Despite efforts to reduce drift and accurately target herbicide application, grower feels there is still too much risk of trunk contact. There are some lower trunk cankers, but whether these are due in part to previous glyphosate exposure not determined. Orchard is ca. 10 acre pick your own. Ground cover system is permanent sod alleys/row middles with vegetation suppression in the tree row during growing season, with moderate regrowth allowed in late summer - early fall for protection against winter low temperatures. The trees are ca. 15 year old Mac and Cortland on M26. New plantings will be tall spindle. Previous tree row vegetation management has been annual glyphosate application in May-June. The objective is to find program that will provide similar results with less risk of trunk injury than associated with glyphosate. New approach being considered is tree row application of 2,4-D (for annual and perennial broadleaves) + Poast (for annual and perennial grasses) in post petal fall period. Gramoxone (paraquat) as alternative burn down herbicide not acceptable because of acute toxicity risk. Rely provides similar postemergent efficacy as glyphosate (though only Fair vs. Good for perennial grass and perennial broadleaf), but may also share the same trunk hazard as glyphosate. Alley sod management will continue to be regular close mowing. Your thoughts on this approach, and the reasons for making this change (i.e. concern about glyphosate) will be appreciated. -- Glen Koehler University of Maine Cooperative Extension Pest Management Office Voice: 207-581-3882 491 College Avenue, Orono, ME 04473 ___ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop
Re: [apple-crop] Residual pesticide activity
insecticides' that might help to answer these questions. It was posted on June 3, 2013. http://msue.anr.msu.edu/news/rainfast_characteristics_of_fruit_crop_insecticides All the best, 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 http://hudsonvf.cce.cornell.edu/bmsb1.html http://web.entomology.cornell.edu/jentsch/links.html -- *From:* apple-crop-boun...@virtualorchard.net [ apple-crop-boun...@virtualorchard.net] on behalf of David Kollas [ kol...@sbcglobal.net] *Sent:* Wednesday, July 31, 2013 8:50 PM *To:* apple-crop@virtualorchard.net *Subject:* [apple-crop] Fwd: Residual pesticide activity Perhaps the sending address I used this morning was wrong. I am trying another now. Begin forwarded message: *From: *David Kollas kol...@sbcglobal.net *Date: *July 31, 2013 9:08:52 AM EDT *To: *Apple-crop discussion list apple-crop@virtualorchard.net *Bcc: *Kollas David kol...@sbcglobal.net *Subject: **Residual pesticide activity* All: Surely others know the answer to this question. I must have missed it somewhere. Does the systemic activity of absorbed neonicotinoid sprays Assail and Calypso replace the surface residual that continues to kill Apple Maggot flies entering an Imidan or Guthion-treated orchard days after the application? Do the neonics provide residual control only by systemic tissue-presence which the insect must consume? Or do Apple Maggot flies get enough active ingredient through their feet to kill them on days-old neonic treatments? The question is relevant in choosing whether, and what pesticide to apply prior to forecast thunderstorms that can remove surface residues. David Kollas Kollas Orchard, Tolland, CT ___ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop ___ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop ___ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop -- Art Kelly Kelly Orchards Acton, ME ___ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop -- Glen Koehler University of Maine Cooperative Extension Pest Management Office Voice: 207-581-3882 491 College Avenue, Orono, ME 04473 ___ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop
RE: Apple-Crop: doctor oz show
1) From The Dr. Oz Show http://www.doctoroz.com/videos/three-dangerous-food-toxins?page=2#copy http://www.doctoroz.com/videos/three-dangerous-food-toxins?page=2#copy Pesticides Even though we always hear about the benefits of organic food, one-third of all fruits and vegetables sold in this country are still covered in pesticides. These poisons, which are intended to kill pests, can also hurt us. Research shows that some of them - called neurotoxins - can harm our brains and nervous systems. One recent study found that children with a high level of a certain pesticide had an increased chance of attention-deficit hyperactivity disorder (ADHD) and developmental disorders similar to autism. Other pesticides, which mimic hormone activity, can possibly reduce fertility. And scientists recently discovered that exposure to one of the most common weed killers increased weight gain in animals by 10%. Your Safety Strategy A Seattle study demonstrates how going organic can immediately affect our health. Researchers tested the urine of a group of typical suburban kids and found pesticide levels above those considered safe by the Environmental Protection Agency (EPA). Then they switched the kids to organic versions of the same foods, and the pesticide level in their urine dropped overnight and stayed low. When the children were returned to their regular diets, their pesticide levels shot right back up above the EPA safety limits. * * Go organic when it counts. Save your money for the fruits and vegetables most likely to contain pesticides (check out our guide to When to Go Organic [LINK http://www.doctoroz.com/videos/when-go-organic]) and to those you eat frequently. As a general rule, fruits and vegetables with thicker rinds such as bananas, oranges, and avocados will have lower levels of pesticides than those with more permeable skin such as potatoes and strawberries. * Eat seasonal and local produce, which will have a lower pesticide level, because it does not have to travel far to get to your table. 2) From the Dr. Oz link included in blurb above: * People always ask whether buying organic is healthier, and the answer is yes. Eating organic protects you from potentially harmful chemicals such as pesticides. But going green is rarely cheap, and it's not always essential, which is why we've created 3 simple rules for when you should spend your green to go green and when to save your cash with conventional foods. * 1. When the skin is thin. Fruits and vegetables with a thin skin that is difficult to remove or that you typically eat should definitely be organic. They have high levels of pesticides even after washing * Go organic: apples, peaches, strawberries, raspberries, blueberries, blackberries, cherries, grapes, pears, nectarines, peppers, celery, potatoes, and carrots 3) More info on the Seattle study http://www.seattlepi.com/local/349263_pesticide30.html Glen Koehler University of Maine Cooperative Extension Pest Management Office 491 College Avenue, Orono, ME 04473 Tel: 207-581-3882 Email: gkoeh...@umext.maine.edu blocked::mailto:gkoeh...@umext.maine.edu Web: http://pmo.umext.maine.edu/apple/ Fax: 207-581-3881 From: apple-crop@virtualorchard.net [mailto:apple-c...@virtualorchard.net] On Behalf Of Annette and Randy Bjorge Fruit Acres Farms Sent: Tuesday, January 26, 2010 8:38 PM To: Apple-Crop Subject: Apple-Crop: doctor oz show Hi Win, Doctor oz show is a syndicated daytime medical advice show. It just started this fall. It is not on a certain network or time. Normally I really enjoy the show, until today. www.doctoroz.com Annette
RE: Apple-Crop: For Discussion: Pesticide Applications Rates and Tree Row Vol...
Jim. Fair enough to say forget TRV, but I'm wondering if you actually do adjust rate per acre in a different way. When you have sprayer set up for 50 or 100 gallons per acre then move from block of larger trees to smaller trees do you keep the same set of nozzles firing, or do you shut down nozzles when you move to smaller trees? Or do you really apply 50 gallons actual spray per acre to larger trees then apply same tankmix with different sprayer settings at 50 gallons actual water per acre to small trees? I guess a third alternative is making no adjustment to the sprayer at all between blocks of different size trees and just overshoot the smaller trees. Or I suppose every block could have similar size trees so question about changes between blocks is a moot point, but that would not apply for most orchards which have trees of different rootstock, trainings system and age leading to different blocks with different sized trees. Glen Koehler University of Maine Cooperative Extension Pest Management Office 491 College Avenue, Orono, ME 04473 Tel: 207-581-3882 Email: gkoeh...@umext.maine.edu blocked::mailto:gkoeh...@umext.maine.edu Web: http://pmo.umext.maine.edu/apple/ http://pmo.umext.maine.edu/apple/ Fax: 207-581-3881 From: apple-crop@virtualorchard.net [mailto:apple-c...@virtualorchard.net] On Behalf Of Jim Bittner Sent: Friday, January 15, 2010 4:09 PM To: 'Apple-Crop' Subject: RE: Apple-Crop: For Discussion: Pesticide Applications Rates and Tree Row Vol... My experience is to forget TRV. It has gotten me in alot of trouble on smaller trees.. We apply at products on a per acre basis and it works fine. The other thing we do is either apply 50 or 100 gal of water per acre. 50 for most things. 100 gal for thinners, leaf roller, mites and oil. From: apple-crop@virtualorchard.net [mailto:apple-c...@virtualorchard.net] On Behalf Of kborcha...@aol.com Sent: Friday, January 15, 2010 1:27 PM To: apple-crop@virtualorchard.net Subject: Re: Apple-Crop: For Discussion: Pesticide Applications Rates and Tree Row Vol... I would think that because apple maggot over winter on the ground that reduction of amount applied per acre in theory would result in a less than proper amount of active material applied to control the pest. The small to large house would not be as important as the fact that each was on a one acre lot. Just my opinion and experience. No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.725 / Virus Database: 270.14.139/2620 - Release Date: 01/15/10 02:35:00
RE: Apple-Crop: For Discussion: Pesticide Applications Rates and Tree Row Vol...
Say it ain't so Dave! Do you really want to leave it at: Thus, for the majority of apple growers, and especially when using newer products, the safest bet will be to apply the recommended amount of product/A regardless of tree size. You really advise apple growers to put on same amount of pesticide per acre to 23 feet tall 20 feet wide trees as 8 feet tall slender spindle? I'm with you about reduced spray capture on slender spindle putting brakes on how far you can go with TRV, but using a minimum 150-200 gpa threshold seems to address that. I don't get the part about leaves being 4 times closer together than they used to be. While canopies have shrunk I don't think the density of leaves has changed. That generates question of then how do apple trees grow so many more fruit per unit leaf area than 30 years ago. My assumption is that dwarf apple trees spend less energy (and thus leaf area) growing wood. Thus, a higher portion of the reduced leaf area is contributing to fruit growth. Way out of my league here. I guess I'm still stuck on the idea that if fixed rate per acre is needed for smallest trees, then it would seem to be under-dosing for much larger trees, or more likely, that dose needed for huge canopy volume trees is more than needed for smallest trees. I'm willing to believe that the weirdness that comes out of quantum physics is actually really true because it happens in a realm beyond my ability to observe, but standing in an orchard I have a hard time believing that a block of giganto trees and dwarf trees need the same amount of pesticide, especially fungicides. Insects move around enough that I could be hypnotized into believing that the same rate of pesticide applies regardless of tree size. But laying down captan to make leaf surface inhospitable to a landing scab spore seems inherently related to the amount of leaf area per acre. This all makes me wonder if/how different body size affects human pharmaceutical dosage. People, I just want to say, you know, can we all get along? - Rodney King, 1992 - Glen Glen Koehler University of Maine Cooperative Extension Pest Management Office 491 College Avenue, Orono, ME 04473 Tel: 207-581-3882 Email: gkoeh...@umext.maine.edu Web: http://pmo.umext.maine.edu/apple/ Fax: 207-581-3881 -Original Message- From: apple-crop@virtualorchard.net [mailto:apple-c...@virtualorchard.net] On Behalf Of Dave Rosenberger Sent: Saturday, January 16, 2010 5:12 PM To: apple-crop@virtualorchard.net Subject: Re: Apple-Crop: For Discussion: Pesticide Applications Rates and Tree Row Vol... Hi, Dave -- Intimidation may by too strong a word, and I certainly have never felt any sense of intimidation concerning my expression of opinions or my selection of research projects. However, I think that all of us are just a bit reluctant to back away from cherished concepts that we viewed for many years as points of progress toward common goals (i.e., IPM, minimizing pesticide use, environmental progress, etc.). As a result, we may be too slow to admit when some of these strategies no longer work as intended. I probably should not have use the PC terminology to express this concern, but there is some of that involved. Ultimately, there can be little doubt that universities are backing away from the kind of applied research that is needed to address complex problems in agriculture. That fact is clearly illustrated by recognizing that Andrew Landers' program is perhaps the only university-supported program in northeastern United States that deals with issues of spray deposition despite the fact that virtually all other research on agricultural pest controls (whether biological, biorational, or traditional pesticides) are ultimately dependent on effective methods for getting the pesticide applied to the target. I think public universities are the locus of origin and propagation of much that has become politically correct in American culture, yet I am surprised by the suggestion (at the end of Dave Rosenberger's useful observations) that unspoken intimidation may now influence the content of university publications on spray recommendations. There could be no enterprise in which unbiased science is more essential than in its application to commercial tree-fruit culture. David Kollas Kollas Orchard Tolland, CT On Jan 16, 2010, at 11:45 AM, Dave Rosenberger wrote: Tree-row volume is a complex subject that always generates widely divergent reactions. I'll add my personal perspectives to further muddy the water. First, as I recall, the TRV concept was introduced by horticulturists looking for a way to reduce variability in results when they applied chemical thinners, and it helped them to meet that objective. However, sprays applied to adjust crop load are different than pest control sprays because, with chemical thinners, there are significant economic
RE: Apple-Crop: Re: Pristine apple tree
Mullein plant bug (Campylomma verbasci) cause early season damage similar to what you describe and can cause heavy damage on one cultivar while leaving others in the same planting much less affected. Glen Koehler University of Maine Cooperative Extension Pest Management Office 491 College Avenue, Orono, ME 04473 Tel: 207-581-3882 Email: gkoeh...@umext.maine.edu blocked::mailto:gkoeh...@umext.maine.edu Web: http://pmo.umext.maine.edu/apple/ Fax: 207-581-3881 What we call the secret of happiness is no more a secret than our willingness to choose life. - Leo Buscaglia From: apple-crop@virtualorchard.net [mailto:apple-c...@virtualorchard.net] On Behalf Of Dave Meyer Sent: Thursday, May 21, 2009 2:49 PM To: Apple-Crop Subject: Re: Apple-Crop: Re: Pristine apple tree Thanks - I see - another commendable early apple (like the Lodi). I will keep a digital photo record of the fruit development. These apples look like they are being bitten by something very early in their development causing the irregular deformation. The Sundance right next to it is blemish free. And this happens every year. Both trees got a great pollination this year - they are loaded. From: Bill Shoemaker mailto:wshoe...@inil.com Sent: Thursday, May 21, 2009 8:03 AM To: Apple-Crop mailto:apple-crop@virtualorchard.net Subject: Re: Apple-Crop: Re: Pristine apple tree Dave I have a couple of Pristine trees on B9 that are about 10 years old now, maybe a couple of years older. The fruit tend to be oblate shaped and with distinct lobing that makes them look a little misshapened. I suspect if pollination isn't optimum, that trait may be pronounced. Harold may be on to an important issue as well. Further, I was not impressed by the quality of fruit early, but over time I learned its peak maturity and have become a fan of it as an apple for fresh eating. I've given them away to a number of people in recent years to learn their response and have had only favorable responses. So I think it's an apple that needs a little patience and a learning curve, but is rewarding in the end. Its certainly become a consistently good apple in that maturity window, which has little else to offer in northern Illinois. Bill I planted Pristine, Sundance and Pixie Crunch in 2002. I am having consistent annual problems with the Pristine. Despite what is implied by its name, I am having a uniquely bad apple quality from this tree. Spray schedule: 1/ dormant oil 2/ Fertilome Blight Spray (streptomycin) was applied during bloom. 3/ Following bloom drop - every 7 - 10 days with Imidan and Captan. Every year, the fruits are notably irregular shaped, bumpy and malformed. They are certainly not smooth and pristine. They are the only variety out of 20 I have that do this. And the malformation is noticeable when fruit is just forming - finger tip sized. Any idea what is causing this? Everything else about the growth of this Pristine Apple is fine. Thanks. Dave Meyer Home orchardist Greenville, OH Bill Shoemaker University of Illinois St Charles Horticulture Research Center
RE: Apple-Crop: copper fungicides for organic apples?
Champ WG is on the OMRI list. Use instructions for anthracnose and European canker say Apply before fall rains., with no other restriction. I'm not a lawyer nor do I play one on TV, but that seems to leave a wide window for interpreting applications made in summer as being within label allowance for timing. Label is at http://www.cdms.net/LDat/ld8NR000.pdf Glen Koehler University of Maine Cooperative Extension Pest Management Office 491 College Avenue, Orono, ME 04473 Tel: 207-581-3882 Email: gkoeh...@umext.maine.edu Web: http://pmo.umext.maine.edu/apple/ Fax: 207-581-3881 What we call the secret of happiness is no more a secret than our willingness to choose life. - Leo Buscaglia -Original Message- From: apple-crop@virtualorchard.net [mailto:apple-c...@virtualorchard.net] On Behalf Of Dave Rosenberger Sent: Tuesday, May 12, 2009 10:30 PM To: apple-crop@virtualorchard.net Subject: Apple-Crop: copper fungicides for organic apples? Can anyone point me to a copper fungicide that is OMRI approved for organic farmers AND that also has a US EPA label that allows repeated applications to apples during summer. I know that I should be able to find this info on the OMRI web-site, but I found that site extremely confusing when I tried it a year or two ago. -- ** Dave Rosenberger Professor of Plant PathologyOffice: 845-691-7231 Cornell University's Hudson Valley Lab Fax:845-691-2719 P.O. Box 727, Highland, NY 12528Cell: 845-594-3060 http://www.nysaes.cornell.edu/pp/faculty/rosenberger/ -- The 'Apple-Crop' LISTSERV is sponsored by the Virtual Orchard http://www.virtualorchard.net and managed by Win Cowgill and Jon Clements webmas...@virtualorchard.net. Apple-Crop is not moderated. Therefore, the statements do not represent official opinions and the Virtual Orchard takes no responsibility for the content. -- The 'Apple-Crop' LISTSERV is sponsored by the Virtual Orchard http://www.virtualorchard.net and managed by Win Cowgill and Jon Clements webmas...@virtualorchard.net. Apple-Crop is not moderated. Therefore, the statements do not represent official opinions and the Virtual Orchard takes no responsibility for the content.
Apple-Crop: Indar and Inspire Super compared to Rally, Rubigan, Procure
1. Does anyone have experimental data, observations, or at least an interesting theory, for the mechanism by which Indar and Inspire Super are more effective the first generation DMIs against apple scab? Our spray guide assigns Indar the same rating as a protectant (Fair) and same time range for post-infection application (72-96 hours) as the first generation DMIs. But are there any differences in the range of forward protection, or in fruit scab prevention vs. foliar scab prevention between the first generation DMIs and Indar or Inspire Super? For practical application, the question boils down to: 2. Are the recommendations for application timing, method, tankmixing, and other considerations for Indar and Inspire Super any different than for Rally (Nova), Rubigan, and Procure? ... or is it that Indar and Inspire Super should be used in exactly the same manner as the first generation DMIs (and with proper dose, tankmix partner, and good coverage of course), with the only difference being, for now at least, better prospects for getting effective scab control with the newer materials? 3. In orchards where the first generation DMIs are still effective, is it preferable to keep using them as long as they work and save Indar and Inspire Super as a fall back position, or is it better to use the best DMI available (i.e. Indar or Inspire Super) to present the highest possible barrier to forestall a shift to DMI resistance in the local scab population as long as possible? Thanks for taking the time to ruminate on and reply to any of these questions. - Glen Glen Koehler University of Maine Cooperative Extension Pest Management Office 491 College Avenue, Orono, ME 04473 Tel: 207-581-3882 Email: gkoeh...@umext.maine.edu Web: PRONewEngland.org Fax: 207-581-3881 What we call the secret of happiness is no more a secret than our willingness to choose life. - Leo Buscaglia -Original Message- From: apple-crop@virtualorchard.net [mailto:apple-c...@virtualorchard.net] On Behalf Of Dave Rosenberger Sent: Friday, May 01, 2009 10:32 AM To: Apple-Crop Subject: Re: Apple-Crop: RE Cedar apple rust Initial evaluations noted that strobilurin fungicides provided only fair control of apple rust diseases, but that was to some extent an artifact of the way that the strobilurins were initially tested in the US. When Flint and Sovran were introduced, we initially thought that we could use them as substitutes for sterol inhibitor fungicides (DMI's), and they were therefore tested and used by applying them at 10-day intervals. We now know that the strobies are NOT substitutes for the DMI fungicides in that they do not have anywhere nearly the same post-infection and presymptom activity against apple scab. They are really super protectant fungicides, but that means that they should be applied in schedules with spray intervals similar to those traditionally used for captan or mancozeb. When I have applied Flint in this fashion, I have had pretty good control of cedar apple rust and quince rust in my test plots that are exposed to extremely high inoculum loads for cedar rust diseases. So the bottom line is that I think that Flint will work well against rust so long as it is applied ahead of rust infection periods. I have less experience with Sovran as a protectant for rust diseases, so I don't know if it would be as effective against rust as Flint is. Hi Con, fair only for rust on the strobilurins -- see: http://ipmguidelines.org/TreeFruits/content/CH06/default-1.asp I also wanted to briefly comment on the rest of your post. Of course you are 'right,' but obviously we are not likely to change it. Same with the discussion about pesticide rate per 100 gallons (based on TRV) vs. rate per acre. Of course the former is more accurate and makes more sense than the latter, but all the new pesticide labels (well, most) are in rate per acre. I think we are just going to have to accept the new 'technology,' adapt, and hopefully continue to make some money. The current business environment is challenging for everyone... :-) Jon Jon Clements Extension Tree Fruit Specialist UMass Cold Spring Orchard 393 Sabin Street Belchertown, MA 01007 VOICE 413.478.7219 FAX 413.323.6647 IM mrhoneycrisp Skype Name mrhoneycrisp On Apr 30, 2009, at 8:33 AM, Con.Traas wrote: PS. Would any of the strobilurins have helped for the cedar rust --- --- The 'Apple-Crop' LISTSERV is sponsored by the Virtual Orchardhttp://www.virtualorchard.net and managed by Win Cowgill and JonClements webmas...@virtualorchard.net. Apple-Crop is not moderated. Therefore, the statements do not representofficial opinions and the Virtual Orchard takes no responsibility forthe content. -- ** Dave Rosenberger Professor of Plant PathologyOffice
Apple-Crop: Nutritional rating to appear on grocery store shelves
A 1-100 rating system for nutritional value of foods was featured in the Sept. 2008 National Geographic (ca. page 21, but page is not numbered). The company that provides the scores (Nuval) says that scores will be displayed on grocery store shelves next to price tags in 300+ Price Chopper (Northeastern U.S.) and Hy-Vee (Midwest) stores beginning in 2009. http://www.nuval.com/pages/WhereToFindNuVal.aspx From press release on Nuval site: NuVal LLC President Nancy McDermott said that many scores will reinforce consumers' common knowledge, such as fresh food ranking higher than processed food, and fruits and vegetables receiving the highest scores. Apples do not appear in the example score list on the Nuval site, but the list of example scores on the National Geographic page showed apple with a rating of 96. Glen Koehler University of Maine Cooperative Extension Pest Management Office 491 College Avenue, Orono, ME 04473 Tel: 207-581-3882 Email: gkoeh...@umext.maine.edu mailto:gkoeh...@umext.maine.edu Web: PRONewEngland.org http://pronewengland.org/ Fax: 207-581-3881 What we call the secret of happiness is no more a secret than our willingness to choose life. - Leo Buscaglia
Apple-Crop: Early season hail damage
A Maine orchard sustained considerable hail damage today. The hail did not cut through the skin, but only slightly dented the fruit. The fruit are roughly 1 inch diameter or less. This happened in another orchard a few years ago and if I recall correctly (big if) most of the fruit turned out to saleable in the end. The orchard in question this year is 99% on-farm retail, so blemish tolerance is presumably higher than for the wholesale fresh fruit channel. The grower and I would appreciate hearing from folks who have experienced similar situation and what were the eventual effects of the early season not-cutting hail dents. Thanks, Glen Glen Koehler Pest Management Office 491 College Avenue Orono, ME 04473 Tel: 207-581-3882 Email: [EMAIL PROTECTED] Web: PRONewEngland.org http://pronewengland.org/ Fax: 207-581-3881 TDD 1-800-287-8957 What we call the secret of happiness is no more a secret than our willingness to choose life. - Leo Buscaglia
