General | Apple Scab | Fireblight | Summer Diseases | Powdery Mildew | Leaf Diseases | Virus & Phytoplasma Diseases | Scaffold, Crown & Root Diseases | Diseases Affecting Fruit | Post-Harvest Diseases
General
- Apple Disease Factsheets (Khan Lab, Cornell Agritech)
- NEWA Apple Disease Models
- Database of Apple Diseases – Khan Lab at Cornell AgriTech
- Diagnostic Keys for Diseases on Apple, Peach, and Cherry Trees (1984 FLS bulletin #108, 162 kb pdf)
- Apple Genes for Disease Resistant Varieties (2007 NYFQ v. 15-2, 693 kb pdf)
Apple Scab
- Apple Scab (Khan Lab, Cornell Agritech)
- Apple Scab (NYS IPM factsheet)
- Dodine Sensitivity in Venturia inaequalis Populations and The Possibility for Renewed Use Against Apple Scab in The Northeastern US (2011 NYFQ v. 19-1, 280 kb pdf)
- Apple Scab Management in High-Inoculum Orchards (2010 NYFQ v. 18-1, 567 kb pdf)
- Scab-resistant Cultivars (2008 NYFQ v. 16-4, 232 kb pdf)
Fireblight
- Fire Blight (Khan Lab, Cornell Agritech)
- Fire Blight (NYS IPM factsheet)
- Effects of Antibiotic Applications on Epiphytic Bacteria in the Apple Phyllosphere (2015 Fruit Quarterly v. 23-4)
- Status of Streptomycin Resistant Fire Blight in New York Orchards (2014 Fruit Quarterly v. 22-3)
- Streptomycin Resistant Fire Blight Discovered in New York (2012 Fruit Quarterly v. 20-1)
- Fire Blight and Streptomycin Resistance (2009 NYFQ v. 17-1, 2.9 mb pdf)
- Managing Fire Blight: New Lessons Learned From the Use of Kasumin for Blossom Blight and Apogee for Shoot Blight Control (2014 Fruit Quarterly v. 22-2)
- Maryblyt V.7 for Windows – Fire blight forecasting software
- Slowing the Spread of Fire Blight During Summer (2010 NYFQ v. 18-2, 945 kb pdf)
- Managing Fire Blight in New Apple Plantings (2008 NYFQ v. 16-1, 1.8 mb pdf)
- Blossom Blight Epidemiology (2008 NYFQ v. 16-3, 153 kb pdf)
Summer Diseases
- Sooty Blotch and Fly Speck (Khan Lab, Cornell Agritech)
- Sooty Blotch and Fly Speck (NYS IPM factsheet)
- Timing Summer Fungicides for Flyspeck on Apples (2007 NYFQ v. 15-1, 147 kb pdf)
- A New Fungicide for Controlling Summer Diseases on Apples? (2012 NYFQ v. 20-4, 5.6 mb pdf)
Powdery Mildew & Rust Diseases
- Powdery mildew (Khan Lab, Cornell Agritech)
- Cedar Apple Rust (Khan Lab, Cornell Agritech)
- Quince Rust (Khan Lab, Cornell Agritech)
- Powdery Mildew of Apple (NYS IPM factsheet)
- Cedar Apple Rust (NYS IPM factsheet)
- Susceptibility of Selected Apple Cultivars to Rusts (Plant Management Network)
- Susceptibility of Selected Apple Cultivars to Powdery Mildew (Plant Management Network)
- Fungicide Programs for Apple Powdery Mildew (2007 NYFQ v. 15-3, 701 kb pdf)
Leaf Diseases
- Black rot and frogeye leaf spot (Khan Lab, Cornell Agritech)
- Cherry Leaf Spot (NYS IPM factsheet)
Virus & Phytoplasma Diseases
- Apple Chlorotic Leaf Spot Virus (NYS IPM factsheet)
- Apple Stem Pitting Virus (NYS IPM factsheet)
- Virus Transmission and Grafting Practices (2016 Fruit Quarterly v. 24-2)
- Plum Pox Disease of Stone Fruits (NYS IPM factsheet, 949 kb pdf)
- Peach X Disease of Peach Trees
- Geneva Experiment Station Helps NY Fight Plum Pox Virus (2008 Cornell Chronicle article)
- Identifying Choke Cherry – Source of X disease (University of New Hampshire)
Scaffold, Crown, Twig & Root Diseases
- Crown Gall (Khan Lab, Cornell Agritech)
- Nectria Twig Blight and Canker (Khan Lab, Cornell Agritech)
- Anthracnose (Khan Lab, Cornell Agritech)
- White Rot (Khan Lab, Cornell Agritech)
- Black Knot of Plum (NYS IPM factsheet) 282k pdf
- Perennial Canker (NYS IPM factsheet) 402k pdf
- Crown Gall of Apple (Penn State factsheet)
- Leucostoma (Cytospora) Canker on Stone Fruit Production
- Phytophthora Root and Crown Rot (NYS IPM factsheet)
- Apple Rootstock Susceptibility to Phytophthora – eXtension
- Pruning Techniques to Manage Bacterial Canker (2010 NYFQ v. 18-1, 1.77 mb pdf)
- Canker Problems in Apple Orchards (2007 NYFQ v. 15-4, 1.8 mb pdf)
Diseases Affecting Fruit
- Anthracnose (Khan Lab, Cornell Agritech)
- Black rot and frogeye leaf spot (Khan Lab, Cornell Agritech)
- White Rot (Khan Lab, Cornell Agritech)
- Bitter Rot (Khan Lab, Cornell Agritech)
- Bacterial Spot on Stone Fruit
- Blister Spot of Apple (1982 FLS bulletin #95, 391 kb pdf)
- Peach Scab of Stone Fruit
- Brown Rot of Stone Fruit (NYS IPM factsheet)
Post-Harvest Diseases
- Blue Mold (Khan Lab, Cornell Agritech)
- Mucor Rot (Penn State factsheet)
- Market Diseases of Apples, Pears and Quinces (1971, Washington State University TFREC)
- Biocontrol of Fruit Rots (2008)