Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

Insects & Diseases

Aphids

Aphids are small, soft-bodied insects with long, slender mouth parts that they use to pierce stems, leaves, and other tender plant parts and suck out plant fluids causing curling, yellowing, and distortion of leaves and stunting of shoots; they can also produce large quantities of a sticky exudate known as honeydew, which often turns black with the growth of a sooty mold fungus. Some aphid species inject a toxin into plants, which further distorts growth. A few species cause gall formations.

Anthracnose

Anthracnose diseases of hardwood trees are widespread throughout the Eastern United States. The most common symptom of these diseases is dead areas or blotches on the leaves. Because of the brown and black, scorched appearance of the leaves, the diseases are sometimes called leaf blight.

Army Worms

Feed on garden plants at night, Larvae can consume and entire plant in 1 night.




Bag Worms

Bagworms attack a variety of trees, some of which include maple, sycamore, elm, locust, and willow. Young larvae feed on the leaf surfaces and eventually, the entire tree can be defoliated. These young larvae construct bags that are made of silk, leaves and twigs and they carry these bags around with them. Adult males are moths with wings; the females are wingless, legless and worm-like. Bagworms overwinter during the egg stage in the bags of the female moth. Around late May and June, the eggs begin to hatch and the larvae begin to construct the bags as they feed. Feeding is done during the summer.


Black Knot

Black Knot appears as unsightly swellings on twigs and branches. Tips of infected branches often die back.





Caterpillars

The forest tent caterpillar (Malacosoma disstria) is an insect found throughout United States and Canada where hardwoods grow. The caterpillar will consume foliage of most hardwood species but prefers sugar maple, aspen and oak.The eastern tent caterpillar (Malacosoma americanum) is more a nuisance than a threat and is not considered a serious pest.

Chinch Bug

Adults and nymphs suck sap from root and stems of lawn grasses, infestation turns grass yellow and some patches may die.

Cottony Maple Scale

Cottony Maple Scale is easily recognized by its large size and cottony masses. The scale is under a flat brown cap and the waxy secretions come from under this cap. It attacks several species of trees. Scales cause damage by sucking the juices from the plants. Heavily infested plants appear unhealthy and produce little new growth. If the scales are not controlled, leaves will drop prematurely, sometimes killing portions of twigs and branches.

 

Cytospora Canker

Causes yellowing, wilting and dieback of new shoots. Infected twigs may show reddish or brown discoloration.




 

Damage on Yew

This is injury is caused by cold temperatures; results are die back and leaf damage.


 

Fleas

Fleas are small, agile, usually dark colored, wingless insects with tube-like mouth-parts adapted to feeding on the blood of their hosts. Fleas (Parasite) are a nuisance to humans and their pets but also can cause infections or irritation.

Gypsy Moths

Larvae feed on leaves of many trees and shrubs, heavy infestations can defoliate trees. Repeated infestation can eventually kill deciduous trees.


 

Inchworms

While many varieties of inchworm go by the name "caterpillar," the term "inchworm" applies to a larvae of the moth family Geometridae, which, according to Ask the Exterminator, contains up to 35,000 species. The Columbia Encyclopedia describes inchworms, also known as cankerworms, as black, brown

Japanese Beetle

Adults eat flowers and skeletonize leaves of a broad range of plants; larvae feed on roots of lawn grasses and garden plants.

Lace Bug

The birch lace bug, Heteroptera: Tongidae, includes approximately 17 species of bugs that prefer certain hosts. The yellow and white birch are two of the favorite hosts. The lace bugs are very small, only about 1/4 to 1/8 inch long. The body is brown to black, and its wings are somewhat transparent.

Leaf Minor

Leaf miners are insect larvae that live and feed from the inside of leaf tissue. They cause damage to trees, garden plants and crops. There are a variety of leaf miners, including beetles, flies, moths, boxwood, and arborvitae. Leaf miners create small translucent spots of green (mines), forming blotches and discoloring the leaf, WE STRONGLY RECOMMEND FOLLOWING UP THE LEAF MINOR TREATMENT WITH A MINIMUM OF TWO SOIL SOAKS.

Leaf Spot

are round blemishes found on the leaves of many species of plants, mostly caused by parasitic fungi or bacteria.A typical spot is "zonal", meaning it has a definite edge and often has a darker border. When lots of spots are present, they can grow together and become a blight or a blotch. Fungal spots are usually round or free-form in shape.

Mealy Bugs

These small white cottony-looking clusters are sucking insects (see photo). They may appear after you water the plants, when they crawl to the surface of the soil. They can also be seen in the areas of the plant where the branches meet the main stem.

Mites

One common mite that affects plants is the spider mite. These mites can cause severe injury to plants in a short amount of time. By piercing holes to feed, spider mites cause leaves to become dry and brittle.

Phytophthora

is a genus of plant-damaging Oomycetes (water molds), whose member species are capable of causing enormous economic losses on crops worldwide, as well as environmental damage in natural ecosystems.

Powdery Mildew

Plants display spots or whites patches on leaves and shoots. Slows plant growth and lowers yield.



Rusts

Produce orange or white spots usually on leaves and stems, weakening plants immune system and stunting growth.



Slime Flux

Slime Flux indicated by slimy liquid that oozes out of cracks and wounds in the bark. The liquid may have a foul odor.




Slugs

Bore large holes in foliage, stems and bulbs. They feast on any tender plant or shrub and may demolish seedlings.



Sow Bug

In high numbers can cause severe damage to seedlings.



Spider

Although spiders are often unpopular, the venom of most species is not very toxic to humans, usually resulting in no more than a slight swelling, inflammation, or itching sensation. Most spiders' fangs are too small or weak to puncture human skin.

Taxus Weevil

The Taxus Weevil or also known as Black Vine Weevilcontinues to be a serious pest on taxus, rhododendron, azalea, hemlock, euonymus, ilex and many other plants used around the home. It feeds primarily on the foliage of plants, causing a distinctive type of injury. They feed on roots and in heavy infestation destroy most of the smaller feeder roots. They feed on roots and in heavy infestation destroy most of the smaller feeder roots.

Tent Caterpillars

Tent caterpillars can be spotted in the spring when the larva create a web like tent. The side effects of these caterpillars can be noticed in the defoliation of trees, which if left unattended can cause serious damage to the tree because it is left susceptible to disease and other insects.

Ticks

Ticks are among the most efficient carriers of disease because they attach firmly when sucking blood, feed slowly and may go unnoticed for a considerable time while feeding. Ticks take several days to complete feeding.

Twig Blight

Infection begins on young leaves, causing tiny yellow spots. Branch tips turn reddish brown and die back.


Whites Flies

The whitefly feeds on a plant and secretes honeydew; causing growth of Sooty mold a black fungus.

Wolly Apelgid

Recognizing Hemlock Woolly Adelgid early and following up with proper and consistent treatments is the key to managing and controlling an outbreak. Healthy hemlocks naturally have a shiny, dark green color. If you notice that yours begin to have a grayish-green appearance or if the foliage yellows, needles are dropping (especially on the interior of the branches) or you notice dieback of some limbs and a lack of vigor in the tree these symptoms probably mean that your Hemlocks are under attack.