Upcoming Events | Trap Catches | Pest Focus | Insects | General Info

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Upcoming Events | Trap Catches | Pest Focus | Insects | General Info

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Upcoming Events | Trap Catches | Pest Focus | Insects | General Info

Geneva: Redbanded Leafroller 2nd flight beginning.
Highland: Apple Maggot increasing in baited sphere traps.
         Japanese Beetle significant feeding damage of apple foliage.
         Pear Rust Mite bronzing damage of pear foliage observed.
         Degree day forecast for hatch of second gen. codling moth = 7/17.
         Degree day forecast for insecticide application against second gen.
           San Jose scale = 7/17.

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Upcoming Events | Trap Catches | Pest Focus | Insects | General Info

Geneva Predictions:
Roundheaded Appletree Borer and Dogwood Borer
RAB peak egg hatch roughly: July 5 to July 25.

Codling Moth
Codling moth development as of July 16: 2nd generation adult emergence at 13% and 2nd generation egg hatch at 1%.

Oriental Fruit Moth
2nd generation second treatment date, if needed: July 18.

Spotted Tentiform Leafminer
Second optimized sample date for 2nd generation sap-feeding mines, if needed: July 14.

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Insect model degree day accumulations:

Codling Moth (Treatment period for the 2nd generation starts at 1260 DD base 50°F after biofix):

Obliquebanded Leafroller (% estimated egg hatch in DD base 43°F after biofix: 90% hatch – 810 DD; 100% hatch – 950 DD):

[NOTE: Consult our mini expert system for arthropod pest management, the
Apple Pest Degree Day Calculator:
http://www.nysaes.cornell.edu/ipm/specware/newa/appledd.php
Find accumulated degree days between dates with the
Degree Day Calculator:
http://www.nysaes.cornell.edu/ipm/specware/newa/
Powered by the NYS IPM Program’s NEWA weather data and the Baskerville-Emin formula]

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Obliquebanded Leafroller
   According to our developmental models, the first summer brood should be closing in on completing its hatch throughout the state this week.  Orchards with historically high OBLR pressure should have received a first application of a suitable material during the first week of July, and this week would be an advisable time to make a second application against the larvae of this brood.  Spintor and Proclaim are appropriate choices, particularly in cases where the larvae are a bit larger, and a B.t. product such as Dipel, or else the IGR Intrepid are also options, but these tend to be more effective when applied against the earlier stages.  Regardless, we have found that this specific spray is the most critical for preventing fruit-feeding damage at harvest, so put this at the top of your list of priorities if OBLR has dogged you in the past.

Apple Maggot
   Trap catches in the state are building slowly, probably owing to the high temperatures and relatively low rainfall, which maintains a hard soil surface that obstructs adult emergence.  If you aren't monitoring in specific orchards and haven't yet applied a protective spray against AM (and aren't using SpinTor for OBLR), prudence would suggest some attention to this pest.  Hanging a few volatile-baited sphere traps on the edge of susceptible plantings can provide a world of insight on when (and whether) immigrating flies are posing a threat.  Growers on a SpinTor program should be somewhere between the first and second spray of this material for leafrollers, which will provide protection against moderate AM pressure.  For those not using OP cover sprays, Assail and Calypso will both provide excellent control of apple maggot as well as internal leps.

Western Flower Thrips
   This formerly rare pest has been a recent cause of damage to nectarines and peaches in the Hudson Valley.  Originally limited to western North America, this is now a cosmopolitan species that is a key pest in the greenhouse production of flowers and vegetables.  Apparently, drought conditions and high temperatures encourage damaging populations that can affect stone fruit crops, particularly nectarines and peaches.  The following information is taken from the PA Tree Fruit Production Guide: "...just prior to and during harvest,...adults move from alternate weed or crop hosts to fruit.  [They] feed on the fruit surface in protected sites, such as in the stem end, the suture, under leaves and branches, and between fruit.  Feeding ...results in silver stipling or patches.  Silvering injury is particularly obvious on highly colored varieties.  Because Lannate has a short preharvest interval (4 days), it can be used to control thrips during harvest."  Also, SpinTor can be used within 14 days of harvest.  An application after the first harvest may prevent subsequent losses; however, an additional application may be needed if thrips pressure is severe.

Mites
   European red mite eggs are present on the foliage right now, and with our sultry temperatures, the period from egg deposit to hatch and multiply is a very short one.  A few orchards we have seen are in ERM trouble so far, but also keep in mind the potential for two-spotted mite, which can reach alarming levels in a hurry under high-temperature conditions.  Inspect your leaves using the 5 mite/leaf form on p. 73 of the Recommends, and be aware that two-spot populations increase more quickly than ERM, so be conservative in your interpretations.  Zeal and Kanemite are good options to keep in mind if treatment is needed; Acramite tends to be more effective against TSSM than ERM, and Nexter works better against red mites than it does on two-spots, but the main advice is to get out there and look at your foliage.

Woollies, again
   Just a repeated advisory to check your canopy sites for aerial colonies of woolly apple aphid, which have been multiplying steadily in many orchards.  These are difficult to control at any time (Diazinon, Thionex, and Assail, in decreasing order of efficacy, are options), and worse when they've been allowed to proliferate to the 'finger-staining' stage.

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Upcoming Events | Trap Catches | Pest Focus | Insects | General Info

   Cornell University will host the 2007 Fruit Field Day and Equipment Show at the New York State Agricultural Experiment Station in Geneva, NY, on Wednesday, July 25, from 8:00 a.m. to 5:00 p.m.  This is one of several events that commemorates the 125th anniversary of the Experiment Station, which opened its doors on March 1, 1882.

   Fruit growers, consultants, and industry personnel are invited to tour field plots and laboratories and learn about the latest research and extension efforts being carried out by researchers on the Geneva, Highland and Ithaca campuses.  The focus will be on all commodities key to New York's $300 million fruit industry: apples, grapes, raspberries, strawberries, peaches, pears and cherries.

   During lunch, equipment dealers will showcase the latest techniques to improve sprayer deposition and reducing drift.  Representatives from various companies will advise growers on the latest technologies.

   The event will be held on the Experiment Station's Fruit and Vegetable Research Farm South, 1097 County Road No. 4, 1 mile west of Pre-emption Rd. in Geneva, NY.  Signs will be posted.  Attendees will be able to select from tours of apples, stone fruits, small fruits, and grapes, as well as a tour of the Experiment Station’s labs and greenhouses.  Admission is free and lunch is provided courtesy of industry sponsors.  Pre-registration is requested.

   For sponsorship and exhibitor information, contact Debbie Breth at 585-798-4265 or dib1@cornell.edu.  More information will be posted to http://www.nysaes.cornell.edu/hort/fieldday/ in the very near future.
For additional information, contact Nancy Long at 315-787-2288 or NPL1@cornell.edu  Register on line at: http://www.nysaes.cornell.edu/hort/fieldday/

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This material is based upon work supported by Smith Lever funds from the Cooperative State Research, Education, and Extension Service, U.S. Department of Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

Scaffolds is published weekly from March to September by Cornell University -- NYS Agricultural Experiment Station (Geneva), and Ithaca -- with the assistance of Cornell Cooperative Extension. New York field reports welcomed. Send submissions by 3 p.m. Monday to:

Scaffolds Fruit Journal
Editors: A. Agnello, D. Kain
Dept. of Entomology, NYSAES
P.O. Box 462
Geneva, NY 14456-0462
Phone: 315-787-2341 FAX: 315-787-2326
E-mail: ama4@cornell.edu

Online at <http://www.nysaes.cornell.edu/ent/scaffolds/>