Now that the warmer weather has finally arrived, so have all of the bugs that have been hibernating all winter. These insects can be very harmful to the health of your trees and plants. They can also be an unwelcoming nuisance to summer picnics, parties, and outdoor activities. Here are five of the most aggressive, and catastrophic, insects that you need to keep an eye out for this spring and summer.


Gypsy Moth-The gypsy moth is a major pest that affects hardwood trees throughout the Eastern United States. The adult moth, and its larvae consume and destroy tree leaves, and lay massive piles of eggs, just as leaves start to bloom. This reproduction stage, often, happens several times a season. The stress of this damage can frequently cause tree death.

Emerald Ash Borer – This insect is mostly known for destroying ash trees including white, black, blue, and pumpkin ash. As an infestation progresses, small vertical splits in the bark can be seen on twigs or the main trunk. Woodpecker holes may also be present. Unfortunately, trees may die after only 2-4 years or less.

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disease on pine tree

Hemlock Woolly Adelgid -The invasive Hemlock Woolly Adelgid prey on hemlock trees, spruce trees, and shrubs. Signs of damage include the yellowing and dropping of needles, thinning crowns, and the death of branches. This effect causes trees to die, which can happen between 3-10 years after infestation!

Cooley Spruce Gall Adelgid -Cooley Spruces are found mostly on spruce trees! More specifically, they target Colorado Spruces and Douglas Firs. Signs of destruction include pineapple-like formations, also known as galls, that are present on the tips of new growth. As galls begin to form, it becomes difficult to manage as the insects are protected within the galls.

disease on pine tree
5 Terrible Tree Destroying Insects in PA 1

Spotted Lanternfly – The spotted lanternfly has been a growing problem among the Northeastern states, specifically Pennsylvania. Nearly thirteen counties have been quarantined since the outbreak. They attack over twenty species of trees, including grape, apple, willow, maple, birch, and ash. The diagnosis of infestation varies from visible grey, egg masses to oozing wounds that leave a dark areas around the trunk of the tree.

Now that you’re aware of these destructive creatures, it’s time to put a stop to them from killing your trees and disturbing your outdoor activities. Don’t take on these pests yourself. Call Strunk Tree Service today to get your FREE on-site estimate!

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