Current Insect and Disease Conditions at Kearneysville

Caution: The observations, conditions, and recommendations reported on this page are applicable only to the eastern counties of West Virginia. Use of the information reported here for making orchard management decisions outside of the immediate proximity of Kearneysville, West Virginia, is not our intent. Fruit producers outside the eastern West Virginia area are encouraged to consult their state extension specialists for information similar to that provided here.

AccuWeather^®5-Day Forecasts for the Mid-Atlantic Region
Kearneysville, W.Va.	Romney, W.Va.
Winchester, Va.	Blacksburg, Va.
Keedysville, Md.	Queenstown, Md.
Bridgeton, N.J.	Biglerville, Pa.

Click for Kearneysville, West Virginia Forecast

Weekly pheromone trap data and degree-day accumulations (updated every M-W-F) from WVU/Kearneysville.

Link to local Davis weather stations

August 4, 2008
- Accumulated wetting hours = 448.
August 2, 2008
- Wet for 8 hours at an average temperature of 67° F - infection period with 0.75 inches of rain.
July 30, 2008
- Wet for 11 hours at an average temperature of 71° F - infection period with 0.03 inches of rain.
July 23 - 24, 2008
- Wet for 31 hours at an average temperature of 65° F - infection period with 2.12 inches of rain (16 hours at 68° F and 15 hours at 62° F).
July 22, 2008
- Wet for 10 hours at an average temperature of 68° F - infection period with 0.10 inches of rain.
July 21, 2008
- Accumulated wetting hours = 372. No precipitation at KTFREC in the past week - additional wetting is from dew. There has been significant rainfall at other locations.
July 14, 2008
- Accumulated wetting hours = 362.
July 13 - 14, 2008
- Wet for 19 hours at an average temperature of 70° F - infection period with 1.99 inches of rain.
July 7 - 8, 2008
- Wet for 14 hours at an average temperature of 67° F - infection period with 0.14 inches of rain.
July 7, 2008
- Accumulated wetting hours = 315.
- Sooty blotch observed in unsprayed plots at the Winchester AREC.
July 6 - 7, 2008
- Wet for 12 hours at an average temperature of 69° F - infection period with 0.48 inches of rain.
July 5 - 6, 2008
- Wet for 12 hours at an average temperature of 67° F - infection period with 0.01 inches of rain.
July 4 - 5, 2008
- Wet for 19 hours at an average temperature of 68° F - infection period with 0.09 inches of rain.
July 4, 2008
- Wet for 8 hours at an average temperature of 68° F - infection period with 1.22 inches of rain.
June 30 - July 1, 2008
- Wet for 15 hours at an average temperature of 63° F - infection period with 0.24 inches of rain (Monday evening thunderstorm).
June 29 - 30, 2008
- Wet for 8 hours at an average temperature of 67° F - infection period with 0.43 inches of rain (Sunday evening thunderstorm).
- Accumulated wetting hours (AWH) for generalized petal fall date of May 3, 2008, = 249. This meets the wetting threshold for presence of the sooty blotch and flyspeck fungi on nonprotected fruit. Symptoms may be visible on these fruit in 2-3 weeks. Remember that fire blight-killed shoots become a significant rot inoculum source.
June 28 - 29, 2008
- Wet for 14 hours at an average temperature of 68° F - infection period with 0.35 inches of rain (Saturday evening thunderstorm).
June 24, 2008
- Hail damage? Dr. David Rosenberger at Cornell's Hudson Valley Lab has a good summary of the treatment options for hail damage in various fruit crops.
- http://www.nysaes.cornell.edu/ent/scaffolds/2008/080623.html#disease
June 23, 2008
- Thunderstorm with 0.12 inches of rain on 6/23/08. Only 2 hours of wetting (no infection period).
- Chance of thunderstorms every day for the past week. Not much has materialized here. 0.03 inches of rain on 6/22/08.
- Accumulated wetting hours (AWH) for generalized petal fall date of May 3, 2008, = 213.
- Reports of hail on 6/22/08 in Hampshire County.
June 16 - 17, 2008
- Reports of hail on 6/16/08 in Berkeley County.
- Wet for 6 hours at an average temperature of 67° F - infection period with 0.26 inches of rain (Monday afternoon thunderstorm).
- Wet for 10 hours at an average temperature of 59° F - infection period with 0.35 inches of rain (Monday evening thunderstorm).
June 14 - 15, 2008
- Wet for 19 hours at an average temperature of 69° F - infection period with 0.71 inches of rain. Note: rain amounts due to thunderstorm activity are highly variable by location. It is good to know your own rain amounts when calculating fungicide weathering.
- Accumulated wetting hours (AWH) for generalized petal fall date of May 3, 2008, = 183.
June 10 - 11, 2008
- Wet for 15 hours at an average temperature of 71° F - infection period with 0.42 inches of rain.
- Accumulated wetting hours (AWH) for generalized petal fall date of May 3, 2008, = 160.
June 9, 2008
- Accumulated wetting hours (AWH) for generalized petal fall date of May 3, 2008, = 145.
- Here is another way to look at weather data from amateur reporters nearby: http://www.findu.com/cgi-bin/wxpage.cgi?call=DW0503
June 6 - 7, 2008
- At some locations: Wet for 11 hours at an average temperature of 72° F - infection period with 0.08 inches of rain, or less.
June 4 - 5, 2008
- Wet for 13 hours at an average temperature of 67° F - secondary apple scab infection period with 0.23 inches of rain.
- Wet for 18 hours at an average temperature of 69° F - secondary apple scab infection period with 1.24 inches of rain.
- I am going to report this as one infection period because of the short dry periods in between: Wet for 31 hours at an average temperature of 68° F - secondary apple scab infection period with 1.47 inches of rain.
- A rain rate of 14.05 inches per hour dropped 1.08 inches of rain in 4.6 minutes. Max. wind speed = 22 mph at 3:00 PM.
June 2, 2008
- Accumulated wetting hours (AWH) for generalized petal fall date of May 3, 2008, = 103.
May 31, 2008
- Wet for 6 hours at an average temperature of 70° F - secondary apple scab infection period with 0.34 inches of rain.
May 26 - 27, 2008
- Wet for 13 hours at an average temperature of 69° F - secondary apple scab and cedar-apple rust infection period with 0.09 inches of rain.
May 21 - 22, 2008
- Wet for 15 hours at an average temperature of 48° F - secondary apple scab infection period with 0.05 inches of rain.
May 20, 2008
- Wet for 15 hours at an average temperature of 48° F - secondary apple scab infection period with 0.81 inches of rain.
May 19, 2008
- Accumulated wetting hours (AWH) for generalized petal fall date of May 3, 2008, = 34.
May 17 - 18, 2008
- Wet for 13 hours at an average temperature of 57° F - secondary apple scab infection period with 0.19 inches of rain.
May 15 - 16, 2008
- Wet for 17 hours at an average temperature of 56° F - secondary apple scab infection period with 0.51 inches of rain.
May 14, 2008
- Scab is easy to find in some commercial orchards.
May 11 - 13, 2008
- Wet for 43 hours at an average temperature of 46° F - secondary apple scab infection period with 3.40 inches of rain.
May 9 - 10, 2008
- Wet for 10 hours at an average temperature of 52° F - secondary apple scab infection period with 0.45 inches of rain.
May 8 - 9, 2008
- Wet for 16 hours at an average temperature of 59° F - secondary apple scab infection period with 0.35 inches of rain. Cedar-apple rust also, but likely not quince rust.
May 8, 2008
- Updated fire blight conditions at Kearneysville.
- It is possible that we had a fire blight infection associated with last night's brief shower (leaf wetting was registered but rain was less than 0.01 inches).
May 5, 2008
- Apple scab lesions observed on nonsprayed trees, likely from infections that occurred on April 20 - 21.
- Cedar-apple rust observed in commercial orchards, likely from infections that occurred on April 20 - 21.
May 4, 2008
- Nighttime wetting with 0.02 inches of rain; duration 10 hours at 55 ° F. This is an apple scab infection period if you have visible scab lesions in the orchard.
May 3, 2008
- Fire blight blossom infection period (#3).
May 2, 2008
- Temperature forecasts are bouncing around, making it difficult to accurately forecast fire blight infection.
April 30, 2008
- Peach leaf curl was observed today on unprotected 'Bounty' peach trees, likely from infections that occurred March 31 - April 1.
- Cedar-apple rust lesions observed in the Winchester area, likely from infections that occurred on April 11-12.
April 28, 2008
- Wet for 16 hours at an average temperature of 52° F - apple scab infection period with 0.81 inches of rain. This is just one hour short of being an infection period when dark hours are subtracted (wet 11 hours at an average temperature of 52° F).
April 26 - 27, 2008
- Wet for 15 hours at an average temperature of 56° F - apple scab infection period with 1.16 inches of rain. Cedar-apple rust infection period. Quince rust infection period.
April 25 - 26, 2008
- Wet for 16 hours at an average temperature of 62° F - apple scab infection period with 0.07 inches of rain. Cedar-apple rust infection period. Quince rust infection period. Fire blight blossom infection period (#2).
April 20 - 21, 2008
- Wet for 48 hours at an average temperature of 58.2° F - apple scab infection period with 4.00 inches of rain. Cedar-apple rust infection period. Quince rust infection period.
- Ascospore maturity model indicates 50% ascospore maturity (90% confidence interval 21 - 80%) (as of Monday morning 4/21/2008).
April 21, 2008
- Fire blight risk is moderate due to cooler weather and then increases later in the week.
- 4.01 inches of rain at WVU-KTFREC; 2.03 inches of rain at Three Churches; 3.36 inches of rain in Arden; 2.46 inches of rain at Ridgefield Farm.
April 19, 2008
- Fire blight blossom infection period on Saturday/Sunday, April 19-20 (#1).
April 16, 2008
- Fire blight prediction using this afternoon's 5-day forecast shows only moderate risk with epiphytic inoculum potential (EIP) at 74% of the threshold.
April 14, 2008
- A brief shower after midnight - 0.04 inches of rain; no infection period.
- Ascospore maturity model indicates 20% ascospore maturity (90% confidence interval 5 - 47%).
- Fire blight risk begins with open blossoms. Modeling with predicted first open bloom later this week shows fire blight risk to be low-moderate at the temperatures forecasted.
April 11 -12, 2008
- Wet for 16 hours at an average temperature of 62° F - apple scab infection period with 1.31 inches of rain. Some rust infection possible on cluster leaves in high rust inoculum areas.
April 10, 2008
- 15-day forecast for fire blight with first bloom open next week shows mostly LOW risk with a couple of MODERATE days. Okay, I know - this seems too soon to be thinking about this...
- Accuweather weather forecast shows likelihood of an apple scab infection period from 12:00 am Saturday morning and ending about 3:00 pm Saturday afternoon (about 15 hours at mid-60's degrees).
April 6, 2008
- Today's conditions were not suitable for apple scab infection.
April 3 - 4, 2008
- Wet for 31 hours at an average temperature of 46° F - light apple scab infection period with 0.56 inches of rain.
March 31 - April 1, 2008
- In Winchester: Apple scab ascospores trapped March 31-April 1. Wet 12 hr at 52-54° F for a light scab infection period. Susceptible green tip exposed on
  most cultivars.
- In West Virginia: We are a couple of days behind Winchester in bud development. Our weather stations measured rain amounts ranging from 0 to 0.04 inches during the period March 31 - April 1, with wetting at our station of 0.01 inches and leaf wetting for 17 hours. Bottom line: technically a scab infection period but in our low inoculum orchards it is unlikely that any infection occurred.
March 31, 2008
- Some bud movement on Red Delicious, Ida Red and Empire; all showing about 50% green tip on most trees.
Average daily temperatures and records
Average last freeze date map

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Updated: 08/05/2008 11:56:12 AM