Cornell Cooperative Extension

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Cornell Cooperative Extension

Nassau County

  • Horticulture
  • Natural Resources
  • Energy & Environment
  • 4-H Youth Development
  • DPF 4-H Camp
  • Nutrition, Health & Wellness
  • Food Systems
Mulched Trees
NEC
Image by Britney Accettella, CCE Suffolk
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  • Fact Sheets >
  • 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
Tip Blight of Pines 
Verticillium Wilt

Last updated January 27, 2016

Fact Sheets

  • Annuals, Perennials, Bulbs & Ferns
  • Diseases of Trees & Shrubs
  • Fruits & Vegetables
  • Home Horticulture
  • House Plants
  • Household Pests
  • Insects on Trees & Shrubs
  • Turf Culture
  • Turf Problems

Events

    closed for Memorial Day holiday
  • Offices Closed - Memorial Day
    Monday, May 26
    12:00 PM - 12:00 PM
  • ​30 Hour Pesticide Training Course - June 2025
    Wednesday, June 4
    8:00 AM - 5:00 PM
  • Offices Closed - Juneteenth
    Thursday, June 19
    12:00 PM - 12:00 PM
  • Offices Closed - Fourth of July
    Friday, July 4
    12:00 PM - 12:00 PM
  • Offices Closed - Labor Day
    Monday, September 1
    12:00 PM - 12:00 PM

See more

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Cornell Cooperative Extension
Nassau County

CCE-Nassau Main Office
Eisenhower Park, Special Activities Center, Parking Field 8
PO Box 148
East Meadow, New York 11554
TEL: 516-832-2591
FAX: 516-832-2597
nassau@cornell.edu

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