RI-Middletown: Apple
PrintMiddletown, Rhode Island
- Apple Calendar, Early Season: Orchard Management: Synopsis of Key Early Season Date
- Apple Calendar, Late Season: Orchard Management: Synopsis of Key Late-Season Dates
- Apple Pest Pocket Guide: Key Apple Pest Thresholds (PDF)
Click to Scroll Down to Sections:
Current Weather
- Three-Day Weather Chart: Temperature, Rain, Wind Speed, Sunlight
- Five-Day Weather Chart: Temperature, Rain, Wind Speed, Sunlight
- 30-Day Temperature Chart and Update Times: Daily High and Low Temperatures
- 30-Day Rain Chart: Daily, Ten-Day and 32-Day Cumulative Precipitation
- Honey Bee Activity: Honey Bee Foraging Activity and Potential Wet Residue Exposure
Apple Scab
Scab Biology
- Daily Primary Scab Infection Potential as % of Yearly Total
Relative primary scab infection risk based on spore maturity, leaf surface area, and sensitivity, temperature, and wetting.
Absolute risk depends on infection pressure, cultivar, site, canopy thickness etc. - Apple Scab: Primary Infection Period Ratings in table format
- Development and Release of Primary Scab Infection Potential
- Apple Scab: Primary Infection Period Details
Text report on timing and severity for each rain event during the primary scab season. - Basic information on Primary and Secondary Apple Scab Infection Periods: Summary
Same as above but covers wetting periods throughout the growing season in less detail. - Scab Ascospore Maturity chart: Spore maturity is only one factor that affects scab risk.
It is less useful than ratings shown above that account for multiple factors that define relative infection risk. - Scab Ascospore Maturity table
Scab Fungicide Respray Dates
Primary Scab
- For orchards protected by a Protectant fungicide (Captan, Mancozeb, Topsin, Syllit)
These estimates also a best guess for SDHI fungicides (Luna, Merivon, Fontelis). - For orchards protected by a Strobilurin fungicide (Flint, Pristine, Sovran, Cabrio).
- For orchards protected by a Sulfur fungicide
These next two tables are for orchards where low scab index was measured the previous fall.
Night time spore releases are discounted in these estimates as they are negligible in low scab orchards.
- ‘Protectant Fungicide’ Respray Dates for Low Scab-Risk Blocks
- Strobilurin Fungicide Respray Dates for Low Scab-Risk Blocks
Secondary Scab
- First and Second Generation Scab Lesion Appearance Dates
- Protectant Fungicide Respray Dates for Secondary Scab Suppression
Respray guidelines for transition period between end of primary scab ascospore releases and confirmation of successful scab control.
Fire Blight
Models estimate relative risk. Absolute risk depends on infection pressure, cultivar, rootstock etc.
- Fire Blight Infection Conditions: Cougarblight Model
- Fire Blight Heat Units vs. High Infection Risk Thresholds
- Fire Blight Infection Conditions: Eastern Model
- Fire Blight Prevention Respray Dates
Flyspeck
Flyspeck control with Pristine: 21 days or 2.5″ rain protection
- Flyspeck Prevention, Full-Dose Pristine: First Cover through June
- Flyspeck Prevention, Full-Dose Pristine: July Spray Dates
- Flyspeck Prevention, Full-Dose Pristine: August-September Spray Dates
Flyspeck control with Group A fungicides (Topsin M, Flint, Sovran, Captan + Phosphite, Inspire Super, Indar, Luna Sensation, Merivon, and when PHI allows, EBDC fungicides): 21 days or 2.0″ rain protection
- Flyspeck Prevention, Group A Fungicides (Strobilurins and Topsin M): First Cover through June
- Flyspeck Prevention, Group A Fungicides (Strobilurins and Topsin M): July Spray Dates
- Flyspeck Prevention, Group A Fungicides (Strobilurins and Topsin M): August-September Spray Dates
Flyspeck control with Captan alone (same dates apply for Ziram): 14 days or 1.5″ rain protection
- Flyspeck Prevention, Full-Dose Captan or Ziram: First Cover through June
- Flyspeck Prevention, Full-Dose Captan or Ziram: July Spray Dates
- Flyspeck Prevention, Full-Dose Captan or Ziram: August-September Spray Dates
- Daily Observed, Forecast and Climatic Average Flyspeck Growth Hours
Charts showing flyspeck growth potential between the end of protection by final spray date and harvest
- Pristine: Flyspeck Growth Hours from End of Protection to Harvest Date
- Group A: Flyspeck Growth Hours from End of Protection to Harvest Date
- Captan: Flyspeck Growth Hours from End of Protection to Harvest Date
Insects
- Apple Insect Pest Degree-Day Models (CM, DWB, LAW, MPB, OFM, OBLR, RBLR, SJS, STLM, TPB, WAL)
Key life cycle and management dates
Plum Curculio
- Insecticide Depletion Table: Plum Curculio Protection Period
- Insecticide Depletion Table: Percent of Plum Curculio Control Period Protected by Latest Spray Date
- Experimental Plum Curculio Activity Rating
Codling Moth
- First Cover: June Insecticide Duration and Codling Moth Egg Hatch
- July Insecticide Duration and Codling Moth Egg Hatch
- August Insecticide Duration and Codling Moth Egg Hatch
Apple Maggot Fly
- First Catch through July: Apple Maggot Fly, Resuming Trap Counts Toward Threshold
- August: Apple Maggot Fly, Resuming Trap Counts Toward Threshold
Mites
- Key Dates for European Red Mites
- Petal Fall: June Mite Scouting Frequency
- July-August Mite Scouting Frequency Adjusted to ERM Generation Time
Horticulture
- McIntosh Bud Stages
- Apple Bud Freeze Mortality Estimates
- Weather Influence on Apple Sensitivity to Chemical Thinners chart
- Estimated Apple Sensitivity to Chemical Thinners table
- Preliminary McIntosh Harvest Date Forecasts (estimates begin after full bloom)
- Potential Pre-Harvest Weather Influences on Storability, Pre-Harvest Drop, Color, and Storage Scald Risk
Weather Archive
Daily Observations
- April Weather Data
- May Weather Data
- June Weather Data
- July Weather Data
- August Weather Data
- September Weather Data
Degree Day Accumulation