Tree Health News & Expert Tips
Outbreak alerts, seasonal care guides, and expert advice from ISA Certified Arborists to keep your trees healthy.
Carolina Pine Sawyer: Identification, Treatment & Control
Carolina Pine Sawyer is a moderate insect threat spreading across Ohio, Kentucky, and North Carolina. Learn how to identify and treat it.
Read more →White-Fringed Weevil: Identification, Treatment & Control
White-fringed weevil is a moderate tree health threat spreading across Kansas, North Carolina, and Oklahoma. Learn how to identify and treat it.
Dot-lined White: Identification, Treatment & Tree Protection
Dot-lined White is a moderate insect threat affecting trees in Ohio, North Carolina, and Maryland. Learn how to identify and treat it.
Ten-lined June Beetle: Identification, Symptoms & Treatment
Ten-lined June Beetle poses a moderate threat to trees in Utah, California, and Colorado. Learn how to identify, treat, and protect your trees.
Swamp Cicada: Identification, Treatment & Tree Protection
Swamp Cicada is a moderate insect threat affecting trees in Louisiana, North Carolina, and Virginia. Learn how to identify and treat it.
Small-eyed Sphinx: Identification, Spread & Treatment Guide
The Small-eyed Sphinx is a moderate insect threat affecting trees across Illinois, Pennsylvania, Massachusetts, and Virginia. Learn how to identify and treat it.
Rosy Maple Moth: Identification, Spread & Treatment Guide
Rosy Maple Moth is a moderate insect threat affecting trees across the Northeast and Mid-Atlantic. Learn how to identify and treat it.
Io Moth: Identification, Treatment & Tree Protection Guide
Io Moth is a moderate insect threat spreading across Mississippi, Pennsylvania, Ohio, and Kentucky. Learn how to identify and treat it.
Versute Sharpshooter: Identification, Spread & Treatment
The Versute Sharpshooter is a moderate-severity insect threat spreading across Kentucky, Massachusetts, and Kansas. Learn how to protect your trees.
Coppery Leafhopper: Identification, Treatment & Control
Coppery Leafhopper is a moderate insect threat spreading across Virginia, Alabama, and Indiana. Learn how to identify and treat it now.
Red-banded Leafhopper: Identification, Symptoms & Treatment
Red-banded Leafhopper is a moderate insect threat spreading across six U.S. states. Learn how to identify, treat, and protect your trees today.
California Tortoiseshell: Identification, Symptoms & Treatment
California Tortoiseshell is a moderate insect threat spreading across Washington, Oregon, and Idaho. Learn how to identify and treat it.
Small White Insect: Identification, Symptoms & Treatment
Small White is a moderate-severity insect threat spreading across Oklahoma, Massachusetts, and California. Learn how to identify and treat it.
Gulf Fritillary: Identification, Symptoms & Treatment Guide
Gulf Fritillary is a moderate insect threat affecting trees in Florida, California, and Louisiana. Learn how to identify and treat it.
Fourteen-spotted Lady Beetle: Identification & Treatment Guide
Fourteen-spotted Lady Beetle has been spotted across Michigan, Pennsylvania, and Connecticut. Learn how to identify and treat this moderate tree health threat.
Red Milkweed Beetle: Identification, Spread & Treatment
Red Milkweed Beetle is a moderate insect threat spreading across the Midwest and Northeast. Learn how to identify and treat it effectively.
Asian Longhorned Beetle: Protecting Your Hardwood Trees
The Asian Longhorned Beetle tunnels deep into hardwood trees, causing serious damage. Learn how to identify, treat, and protect your trees today.
Eastern Boxelder Bug: Identification, Symptoms & Treatment
Eastern Boxelder Bug is a moderate threat spreading across 14 states. Learn how to identify, treat, and protect your trees today.
Six-spotted Tiger Beetle: ID, Treatment & Tree Health Guide
Learn how to identify the Six-spotted Tiger Beetle, understand its threat to trees, and explore treatment options for affected regions.
Spotted Pink Lady Beetle: Identification & Treatment Guide
The Spotted Pink Lady Beetle is a moderate tree health threat spreading across Texas, Illinois, Kansas, and Arkansas. Learn how to identify and treat it.
Pale Green Assassin Bug: Identification & Treatment Guide
Discover how to identify and manage the Pale Green Assassin Bug threatening trees across Kansas, Connecticut, Massachusetts, and Maryland.
Small Milkweed Bug: Identification, Treatment & Control
Small Milkweed Bug is a moderate insect threat spreading across CT, CO, and NY. Learn identification tips, treatment options, and when to call an arborist.
Eastern Leaf-footed Bug: Identification, Treatment & Control
Eastern Leaf-footed Bug is a moderate insect threat spreading across Mississippi, Florida, and Texas. Learn how to identify and treat it.
False Milkweed Bug: Identification, Treatment & Control
False Milkweed Bug is a moderate threat spreading across PA, NJ, and CT. Learn how to identify, treat, and protect your trees today.
Western Conifer Seed Bug: Identification & Treatment Guide
Western Conifer Seed Bug is spreading across Maryland, Ohio, New Jersey, and Michigan. Learn how to identify, treat, and protect your conifers.
North American Wheel Bug: Tree Threat Guide for Homeowners
Spotted a North American Wheel Bug on your trees? Learn identification tips, treatment options, and when to call a certified arborist.
Leptoglossus oppositus: Identification, Spread & Treatment
Leptoglossus oppositus is a moderate insect threat spreading across several U.S. states. Learn how to identify, treat, and protect your trees.
North American Common Water Strider: Tree Health Guide
Learn about North American Common Water Strider identification, symptoms, and treatment options to protect trees in affected regions.
Silver-spotted Skipper: Tree Threat Guide for Homeowners
Learn Silver-spotted Skipper identification, symptoms, and treatment options to protect trees in Oklahoma, Texas, Maryland, and beyond.
Eastern Tiger Swallowtail: Tree Health Guide for Homeowners
Eastern Tiger Swallowtail has been observed across 5 states. Learn identification tips, treatment options, and when to call a certified arborist.
Gray Hairstreak: Identification, Treatment & Tree Protection
Gray Hairstreak is a moderate insect threat affecting trees across six U.S. states. Learn how to identify, treat, and protect your trees today.
Painted Lady Butterfly: Tree Health Threat Guide
Painted Lady activity is raising concerns in Western states. Learn identification, symptoms, and treatment options to protect your trees.
Isabella Tiger Moth: Identification, Treatment & Tree Health
Isabella Tiger Moth poses a moderate threat to trees in Maryland, Massachusetts, and Oregon. Learn how to identify and treat it effectively.
Mourning Cloak: Identification, Treatment & Tree Health Guide
Mourning Cloak is a moderate insect threat affecting trees across 5 U.S. states. Learn how to identify, treat, and protect your trees today.
Monarch Insect Threat: Identification, Spread & Treatment
Monarch is a moderate insect threat affecting trees across 8 U.S. states. Learn how to identify, manage, and treat this pest before it spreads.
White-lined Sphinx: Identification, Symptoms & Treatment
White-lined Sphinx is a moderate insect threat spreading across the Southwest and West. Learn how to identify, treat, and protect your trees.
Red Admiral: What Homeowners Need to Know in 2024
Red Admiral is a moderate insect threat affecting trees across 8 states. Learn identification tips, treatment options, and when to call an arborist.
Seven-spotted Lady Beetle: Tree Health Guide & Treatment
Learn how to identify, manage, and treat Seven-spotted Lady Beetle activity affecting trees across 14 U.S. states.
Asian Lady Beetle: Tree Health Threat Guide for Homeowners
Asian Lady Beetle is a moderate tree health threat spreading across 21 states. Learn identification, treatment, and when to call an arborist.
Convergent Lady Beetle: Tree Health Threat Guide
Convergent Lady Beetle poses a moderate threat to trees across 6 U.S. states. Learn identification, symptoms, and treatment options.
Bronze Birch Borer: Identification, Symptoms & Treatment
Bronze Birch Borer is a HIGH severity threat killing birch trees across 26 states. Learn to spot the signs early and protect your trees.
Pine Wilt Disease: Symptoms, Treatment & What to Do
Pine Wilt Disease kills trees within weeks. Learn how to spot the symptoms, protect your pines, and when to call a certified arborist.
Chestnut Blight: Identification, Symptoms & Treatment
Chestnut Blight devastated American forests. Learn how to identify symptoms, explore treatment options, and protect surviving trees.
Bagworm: Identification, Symptoms & Treatment Guide
Bagworms threaten over 100 tree species across the eastern US. Learn how to spot, treat, and stop these damaging insects before they defoliate your trees.
Ips Bark Beetles: Identification, Symptoms & Treatment
Ips bark beetles threaten stressed pines across 19 states. Learn how to identify symptoms early and protect your trees before an outbreak takes hold.
Mountain Pine Beetle: Symptoms, Treatment & How to Protect Your Trees
Mountain Pine Beetle is devastating millions of acres of western pines. Learn how to spot the signs early and protect your trees before it's too late.
Southern Pine Beetle: Identification, Treatment & Control
Southern Pine Beetle is a high-severity insect threat killing pine trees across 13 states. Learn to spot the signs and act fast.
Hemlock Woolly Adelgid: Identification, Spread & Treatment
Hemlock Woolly Adelgid is killing eastern hemlocks across 20 states. Learn how to spot it early and protect your trees before it's too late.
Asian Longhorned Beetle: Identification, Symptoms & Treatment
The Asian Longhorned Beetle is a critical threat to hardwood trees across the US. Learn how to spot it and protect your property.
Emerald Ash Borer in Wisconsin: 2026 Update and Treatment Options
Wisconsin's emerald ash borer infestation continues to expand. Get the latest 2026 county-by-county update, learn about trunk injection treatments, and find out whether your ash tree can still be saved.
Invasive Species Alert: Top 10 Threats to American Forests
Invasive pests and diseases have killed billions of trees across the United States. Meet the top 10 invasive threats currently reshaping America's forests and learn what is being done to stop them.
Emerald Ash Borer: The Silent Killer Spreading Across America
The emerald ash borer has killed hundreds of millions of ash trees since its discovery in 2002. Learn how to identify this invasive beetle and protect your ash trees before it reaches your area.
How to Identify Spotted Lanternfly and What to Do
Spotted lanternfly has spread to over a dozen states and threatens hardwoods, fruit trees, and vineyards. Here is how to identify and report this invasive pest.
Dutch Elm Disease in Illinois and Indiana: What Homeowners Need to Know
Dutch elm disease continues to kill American elms across Illinois and Indiana. Learn the history, symptoms, fungicide injection options, and which resistant cultivars can restore elms to your landscape.
Gypsy Moth (Spongy Moth) Outbreaks in Michigan and Wisconsin
Spongy moth populations are surging again in Michigan and Wisconsin. Learn to identify egg masses, understand Btk spraying, burlap banding, and when to call a professional for your trees.
Armillaria Root Rot: The Hidden Killer Under Your Trees
Armillaria root rot is one of the most widespread and destructive tree diseases in the world, yet most homeowners have never heard of it. Learn how to spot this underground threat before it topples your trees.
Thousand Cankers Disease: A Growing Threat to Midwest Black Walnut Trees
Thousand cankers disease threatens the Midwest's valuable black walnut trees. Learn about this devastating combination of the walnut twig beetle and Geosmithia fungus, current spread, and what homeowners can do.
Citrus Greening Disease Threatens Florida's Orchards
Citrus greening, also known as Huanglongbing, has devastated Florida's citrus industry. Understand this incurable disease and what researchers are doing to fight it.
Sudden Oak Death in California: Current Status and Management
Sudden oak death continues to spread through California and Oregon forests, killing tanoak and several oak species. Get the latest on affected areas, identification tips, and management strategies.
Pine Bark Beetle Outbreaks in the Western US
Pine bark beetles have killed billions of trees across Colorado, Montana, California, and Oregon. Understand the causes behind these massive outbreaks and what can be done to protect surviving forests.
Spotted Lanternfly Spreading in the Northeast: What You Need to Know
The spotted lanternfly continues its rapid spread across the Northeast. Learn how to identify this invasive pest, which trees it threatens, and what homeowners in PA, NJ, NY, CT, and DE can do to fight back.