Upcoming Events | Trap Catches | Insects | general Info

Upcoming Events | Trap Catches | Insects | general Info

Upcoming Events | Trap Catches | Insects | general Info

Geneva Predictions:
Roundheaded Appletree Borer & Dogwood Borer
Peak RAB egg hatch roughly: July 9 to July 28.
Peak DWB egg hatch roughtly: July 30.

Codling Moth
Codling moth development as of July 21: 2nd generation adult emergence at 9% and 2nd generation egg hatch at 0%.
2nd generation CM 7% egg hatch: July 31 (= target date for first spray where multiple sprays are needed to control 2nd generation CM).

Spotted Tentiform Leafminer
Optimum third sample date for 2nd generation STLM sap-feeding mines: July 26.

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]

       European red mite numbers have been increasing in some of the region's orchards with the recent hot temperatures, so in the interest of keeping informed of current management efforts, the following article details an ERM miticide trial we conducted last year in a research orchard at the Geneva Station.

       Miticide sprays were applied with a Durand-Wayland airblast sprayer at 100 GPA at ERM threshold (16 Jul) to single 'Red Delicious' trees planted at a spacing of 15 x 30 ft.  Treatments were separated by unsprayed buffer trees as well as drive rows.  The treatments were Envidor 240SC (16.0 oz/ acre); Kanemite 15SC (25.0 oz/ acre); Agrimek 0.15 EC (3.5 oz/ acre); Nexter (4.4 oz/ acre) and an Untreated Check.  Treatments including the Untreated Check were replicated three times in single-tree plots and arranged in a RCB design.  ERM and predaceous mites were sampled on 25 randomly selected leaves per tree per replication on 2 Jul, 11 Jul, 16 Jul, 23 Jul, 30 Jul and 6 Aug.  Motile stages of mites and eggs were brushed from the leaves with a mite-brushing machine.

       The summer of 2007 was very conducive to ERM pressure due to extended periods of high temperatures with little rain.  This research orchard was treated with synthetic pyrethroids several times throughout the season in order to facilitate population growth of ERM.  These sprays also eliminated most predaceous mites.  Consequently, predators were not present until these applications ceased, and even then they were at very low numbers or absent from both treated and check plots.  Mite numbers in the plots varied between treatments before miticides were applied.  Therefore, applications were made when the majority of the plots had reached or exceeded threshold levels in July (avg 5 mites/leaf).  ERM populations were significantly lower in all treatments than in the check plots 7d post-treatment on 23 July, and ERM numbers remained below threshold in the Nexter, Envidor and Agrimek plots until 6 Aug (Table 1).  ERM populations were initially very high in the Kanemite plots (20.9/leaff), and although this material significantly reduced ERM numbers during the rest of the season, this material was not as effective as the other treatments.  ERM numbers were low (1.6 mites/leaf) prior to treatment in the Agrimek plots; these remained fairly stable during the rest of the season.

Table 1. Evaluation of miticides for control of European red mite, 2007.

Means within a column followed by the same letter are not significantly different (Fisher's Protected LSD Test, P £ 0.05). Data transformed by arcsine (Sqrt x) prior to analysis.

Upcoming Events | Trap Catches | Insects | general Info

   We're about one and a half months away from the annual N.Y. Fruit Pest Control Field Day, which will take place during Labor Day week on Sept. 3 and 4 this year, as dictated by tradition.  These dates fall on the Wednesday and Thursday of the week, with the Geneva installment taking place first (Wednesday Sept. 3), and the Hudson Valley installment on the second day (Thursday Sept. 4).  Activities will commence in Geneva on the 3rd, with registration, coffee, etc., in the lobby of Barton Lab at 8:30 am.  The tour will proceed to the orchards to view plots and preliminary data from field trials involving new fungicides, bactericides, miticides, and insecticides on tree fruits and grapes.  It is anticipated that the tour of field plots will be completed by noon.  On the 4th, participants will register at the Hudson Valley Laboratory starting at 8:30, after which we will view and discuss results from field trials on apples and other fruit crops.  No pre-registration is required for either event.

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
630 W. North St.
Geneva, NY 14456-1371
Phone: 315-787-2341   FAX: 315-787-2326
E-mail: ama4@cornell.edu