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Cornell Cooperative Extension

Nassau County

  • Gardening
  • Natural Resources
  • Energy & Environment
  • 4-H Youth Development
  • DPF 4-H Camp
  • Nutrition, Health & Wellness
  • Taste NY
  • Virtual Learning
Mulched Trees
NEC
Image by Britney Accettella, CCE Suffolk
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  • 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

    caution sign re: pesticide use
  • Online: Insecticides 101
    Thursday, February 2
    6:00 PM - 9:30 PM
  • ​Online: 30 Hour Pesticide Training Course - February 2023
    Monday, February 6
    8:00 AM - 5:00 PM
  • Urban Forestry Academy
    Wednesday, February 8
    7:00 PM - 8:30 PM
  • ​Heart-Shaped Ravioli Making for Valentine's Day
    Tuesday, February 14
    5:00 PM - 7:00 PM
  • Urban Forestry Academy
    Wednesday, February 15
    7:00 PM - 8:30 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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