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Cornell Cooperative Extension

Sullivan County

  • 4-H Youth Development
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  • Catskills Kitchen
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  • Gardening >
  • Tree Pests & Diseases
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Tree Pests & Diseases

Anthracnose Leaf Blight of Shade Trees

Anthracnose Leaf Blight of Shade Trees

Anthracnose of Trees & Shrubs

Anthracnose of Trees & Shrubs

Arborvitae Leaf Miner

Arborvitae Leaf Miner

Ash Dieback

Ash Dieback

Asian Longhorn Beetle

Asian Longhorn Beetle

Bagworms

Bagworms

Balsam Twig Aphid

Balsam Twig Aphid

beetle bark

Bark Beetle

Birch Leaf Miner Sawfly

Birch Leaf Miner Sawfly

Black Turpentine Beetle

Black Turpentine Beetle

Black Vine Weevil

Black Vine Weevil

Bronze Birch Borer

Bronze Birch Borer

Christmas Tree Pest Manual

Christmas Tree Pest Manual

Cornell Plantations' Pink Ugly Mix Saves Trees from Holiday Thieves

Cornell Plantations' Pink Ugly Mix Saves Trees from Holiday Thieves

Eastern Spruce Gall Adelgid

Eastern Spruce Gall Adelgid

Emerald Ash Borer

Hemlock Woolly Adelgid

Hemlock Woolly Adelgid

Honeylocust Plant Bug

Honeylocust Plant Bug

Honeylocust Pod Galls

Honeylocust Pod Galls

Horntails

Horntails

Horticultural Oil Pest Control

Horticultural Oil Pest Control

mported Willow Leaf Beetle

Imported Willow Leaf Beetle

Integrated Pest Management (IPM)

Juniper Scale

Magnolia Scale

Magnolia Scale

Maple Decline

Maple Decline

Maple Gall Mites

Maple Gall Mites

Maple Trumpet Skeletonizer

Mountain Ash Sawfly

Mountain Ash Sawfly

Oak Skeletonizer

Oak Skeletonizer

Pests of Ornamentals

Pests of Ornamentals

Pine Needle Scale

Pine needle Scale

Pine Tortoise Scale

Pine tortoise Scale

Plant Galls

Plant Galls

Spruce Needleminer

Spruce Needleminer

Spruce Spidermites

Spruce Spidermites

Sugar Maple & Pear Thrip

Sugar Maple & Pear Thrip

Walnut Wilt

Walnut Wilt

White Pine Beetle

White Pine Beetle

Last updated May 11, 2021

Gardening

  • Avoiding Lyme Disease
  • Compost Resources
  • Deer Resistant Plants
  • Food Gardening
  • Houseplants
  • Lawns & Ornamentals
  • Pests & IPM
  • Soils & Climate
  • Pollinators
  • Tree Pests & Diseases
  • Invasive Species
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Cornell Cooperative Extension
Sullivan County

Extension Education Center
64 Ferndale-Loomis Road
Liberty, New York 12754
TEL: 845-292-6180
sullivan@cornell.edu
Hours: Weekdays 8:30 am - 4:30 pm

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