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Current Threats to Forest Health

Current issues in forest health of the greatest concern to the DEM’s Forest Health Program include both exotic/invasives and native insects and diseases. Some pests are of state concern while others are of regional or national concern.

*Click on the Insect Name for more local information (where available).

Insects Name*/Details Additional Resources
Emerald Ash Borer Emerald Ash Borer
Detection Map
Status: Exotic
Mostly Affects: All species of Ash
Asian Longhorned Beetle Asian Longhorned Beetle
Status: Exotic
Mostly Affects: Maples
Winter Moth Winter Moth
Status: Exotic
Mostly Affects: Maples
NH Winter Moth Alert
Winter Moth Control Measures
European Gypsy Moth European Gypsy Moth
Gypsy Moth in Rhode Island
Status: Exotic
Mostly Affects: Oaks, other hardwoods

USDA APHIS Gypsy Moth Information
USDA Forest Service “Pest Alert”
USDA Forest Service Gypsy Moth Information
Hemlock Woolly Adelgid Hemlock Woolly Adelgid
Status: Exotic
Mostly Affects: Hemlock
USDA Forest Service Hemlock Woolly Adelgid info
Southern Pine Beetle Southern Pine Beetle
Status: Native
Mostly Affects: Hard pines (Pitch pine), Others
USDA Forest Service Southern Pine Beetle
Oak Gall Wasps Oak Gall Wasps
Status: Native
Mostly Affects: All Oak
Gall Wasps – Wikipedia
spotted lanternfly Spotted Lanternfly
Status: Exotic
Mostly Affects: Ailanthus, fruit trees, grape vines
USDA APHIS “Leave Hungry Pests Behind"
Northeastern IPM Center
Diseases Name*/Details Additional Resources
Beech Leaf Disease Beech Leaf Disease (BLD) Mostly Affects: all American Beech Ohio DNR
USDA Forest Service "Pest Alert"
Beech Bark Disease Beech Bark Disease (Neonectria spp.) Mostly Affects: American Beech USDA Forest Service Beech Bark Disease info
USDA Invasive Species Information Center
Rhyzosphaera needle cast Rhyzosphaera needle cast Mostly Affects: Colorado Blue, other Spruces & Firs UMass Extension: Rhizophaera Needle Cast
White Pine Needle Damage White Pine Needle Damage Mostly Affects: Eastern White Pine Monitoring Eastern White Pine Decline and its Causes
White Pine Blister Rust White Pine Blister Rust Mostly Affects: Eastern White Pine USDA Forest Service White Pine Blister Rust
USDA Forest Service White Pine Blister Rust General Ecology and Management
Sudden Oak Death (Phytophthora ramorum) Sudden Oak Death (Phytophthora ramorum)
Mostly Affects: Oaks, Laurels
USDA APHIS Sudden Oak Death
USDA Forest Service Sudden Oak Death info

Report A Pest

DEM monitors exotic pests as part of the Cooperative Agricultural Pest Survey (CAPS). If you think you've discovered a pest not native to Rhode Island, and particularly if you suspect the pest to be the Asian Longhorned Beetle or the Emerald Ash Borer, please us to let us know.

Report an Exotic Agricultural Pest, Invasive Insect or Plant

NOTE: If you believe you have found an Asian Longhorn Beetle or Emerald Ash Borer, please make every safe and reasonable effort to capture or closely photograph it to aid in identification, as there are several native species with a similar appearance.

Division of Agriculture and Forest Environment
Ken Ayars, Chief
RI Department of Environmental Management
235 Promenade Street
Providence, RI 02908-5767
Phone: (401) 222-2781 ext. 2774500