Current Insect and Disease Conditions at KTFREC

Fruit Tree Books

Caution: The observations, conditions, and recommendations reported on this page are applicable only to the eastern counties of West Virginia. Tthe information reported here is to be used for making orchard management decisions in the immediate proximity of Kearneysville, West Virginia. Fruit producers outside the eastern West Virginia area are encouraged to consult their state extension specialists for information similar to that provided here.  

ladybug1.gif (1229 bytes)Weekly pheromone trap data and degree-day accumulations (updated every M-W-F) from KTFREC. Trap data and degree-days are presented - questions about these data should be directed to Dr. Daniel Frank, Entomology Extension Specialist.

KTFREC Weather Station

NOAA Climate Forecast

  • April 29, 2015
    • Here is our 10-day fire blight forecast. The next HIGH RISK period begins on May 4 and continues daily through May 8. INFECTION will occur with any wetting event during this period (rain, fog, dew, and sustained high relative humidity).
  • April 25 - 26, 2015
    • Wetting period starting at 7 PM on 4/25 and continuing to 8 AM on 4/26 for 14 hours of leaf wetness at 41.0 F and 0.32 inches of rainfall. (not and apple scab infection - we need about 20 hours of wetting at this temperature).
  • April 22, 2015
    • Fire blight infection was possible on 4/20 if you had open blossoms on 4/18.
  • April 20 - 21, 2015
    • Night time wetting for 7 hours at 61 F. Rust infection possible. Not a scab infection in low inoculum orchards.
  • April 19 - 20, 2015
    • Wetting period starting at 7 PM on 4/19 and continuing to 9 AM on 4/20 for 15 hours of leaf wetness at 52.2 F and 1.27 inches of rainfall. (apple scab #5).
    • Fire blight infection was possible on 4/20 if you had open blossoms on 4/18.
  • April 16 - 17, 2015
    • Wetting period starting at 11 PMon 4/16 and continuing to 7 AM on 4/17 for 9 hours of leaf wetness at 53.9 F and 0.02 inches of rainfall. Not an infection period in low inoculum orchards.
  • April 14 - 15, 2015
    • Wetting period starting 4:00 AM on 4/14 to 9:00 AM on 4/15 for a total of 27 hours of leaf wetness at an average temperature of 53.5 F and 0.43 inches of rainfall. We had 11 hours of wetting above 55 F, so this infection period for apple scab was also our first infection period for cedar apple rust and quince rust if plant development was favorable (blossoms are susceptible to quince rust beginning at the tight cluster stage). (apple scab #4) (rust #1).
  • April 9 - 10, 2015
    • Apple scab infection period (#3).
  • April 8, 2015
    • Apple scab infection period (#2).
  • April 7, 2015
    • Apple scab infection periods (#1).
  • April 6, 2016
    • Apple "green tip" stage of development marks the beginning of our 2015 growing season.
  • April 1, 2015
    • There is a forecast for "apple scab weather" on April 3, April 5, and the potential for extended wetting April 7 - 10. Apple trees showing developmental stages green tip or beyond should be protected from infection.
    • Dr. Kari Peter (Penn State Extension) prepared an excellent write up on how to prepare your 2015 fire blight management program. It can be found here. She forgot to mention that the new Maryblyt version 7.1 can be downloaded here.
  • March 25, 2015
    • First apple scab ascospores caught in spore traps at Winchester AREC.
  • October 29, 2014
    • End-of-season Disease Management Reminders
      Peach leaf curl
      should be controlled in the spring and/or fall with a fungicide application before the buds swell. If leaf curl was severe in your peach and nectarine blocks in 2014, and you made your fall fungicide application to control the disease for 2014, a spring fungicide application will be needed to ensure complete disease control. In orchards where careful monitoring is practiced and where leaf curl has not been present for two or more years, this spray can be omitted until the disease begins to recur. For best control of peach leaf curl, make a dilute application of fungicide under calm conditions, making sure to cover each bud thoroughly. Using one of the fixed coppers for the leaf curl spray may help suppress bacterial spot in blocks where this disease is a problem. See the Spray Bulletin for fungicides and rates of application.
    • Apple scab urea application: A spray of 5% solution of urea (46-0-0) in water may be applied as late as green tip to apple leaves on the ground if this was not done in the autumn (42 lb. urea in 100 gal. water, applied at 100 gallons/acre). The nitrogen will hasten leaf litter decomposition and will result in reduced ascospore production by 60 to 90%, thereby changing high-inoculum orchards into low-inoculum orchards. Moving leaves from under the trees to the row middles with a leaf blower and then shredding them with a flail mower is a good alternative to the urea spray for small acreages on level land (mud, rocks, and weeds can turn this into a futile exercise). If you had enough scab that you easily noticed it at the end of last year’s growing season, one of these inoculum reduction measures should be implemented. If the urea spray is used, remember to reduce other nitrogen applications accordingly. I estimate that about half of the urea nitrogen will land in the sodded row middles, and thus will not be available to the trees.
  • Spring will be here soon! Will you be ready?
  • Average daily temperatures and records
  • Average last freeze date map


Web Site Author: Alan R. Biggs
Copyright ©1996-2014.