Cornell Cooperative Extension

Columbia and Greene Counties

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Cornell Cooperative Extension

Columbia and Greene Counties

  • Agriculture & Natural Resources
  • Family & Consumer Sciences
  • Gardening
  • Climate Change & the Environment
  • 4-H & Youth Development
  • Taste NY
Mulched Trees

Learn more about diseases that can affect trees and shrubs

NEC
Image by Britney Accettella, CCE Suffolk

Trees and shrubs can be affected by numerous diseases

Pruning Shrubs

Trees and shrubs can be attacked by multiple diseases

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  • Lawns & Ornamentals >
  • Diseases of Trees & Shrubs
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Diseases of Trees & Shrubs


Anthracnose
Apple Maggot & Apple Scab
Arborvitae Problems
Black Knot
Cedar Apple Rust
Cultural Problems of Plants
Diagnosing Rhododendron Problems
Disease Resistant Ornamental Trees
Fire Blight
Flowering Dogwood Problems
Juniper Twig Blight 
Leucostoma Canker of Spruce
Maple Decline
Sooty Mold

Tar Spot of Maple
Tip Blight of Pines 
Verticillium Wilt

Last updated May 10, 2021

Lawns & Ornamentals

  • Annuals
  • Diseases of Trees & Shrubs
  • Lawns
  • Native Plants
  • Perennials
  • Trees & Shrubs

Events

  • Fall Gardening: Extending the Growing Season
    Today
    3:30 PM - 4:30 PM
  • “So You Want to Be a Master Gardener Volunteer?” – Info Session for Prospective Applicants
    Tomorrow
    10:00 AM - 11:00 AM
  • Silvopasture Field Day
    Thursday, July 10
    5:00 PM - 7:00 PM
  • Outdoor Mushroom Farming Series
    Thursday, July 17
    5:00 PM - 7:00 PM
  • The Night Shift: Creating A Garden to attract Nighttime Pollinators
    Friday, July 18
    1:00 PM - 2:00 PM

See more

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Cornell Cooperative Extension
Columbia and Greene Counties

Agroforestry Resource Center (Business Office)
6055 Route 23
Acra, New York 12405
TEL: (518) 622-9820
FAX: (518) 622-0115
[email protected]
NEW Hours: 8:30 am-4:00 pm weekdays (closed for lunch 12:00-12:30 pm)

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Extension Education Center 479 Route 66
Hudson, New York 12534
(518) 828-3346

Cornell Cooperative Extension is an employer and educator recognized for providing equal program and employment opportunities in accordance with applicable laws.

CCE Columbia and Greene Counties is a registered 501(c)(3) nonprofit.

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