Tree Disorders Identification

Mountain pine beetle

A destructive insect that kills trees by eating holes in the inner bark to lay its eggs

Mistletoe

A parasitic plant that grows on apple, oak, and other broad leaf trees; bears white berries in winter.

Wildlife/Livestock damage

An animal that causes damage to a wild ecosystem. For example, a deer feeding on terminals of recently planted pine seedlings or A beaver chewing the bark of trees.

Aphid

Any of various small plant-sucking insects, capable in large numbers to cause yellowing, wilting, and curling of plant leaves.

Ipps engraver beetle

Are bark beetles that damage pine and spruce trees. They develop under the bark and produce girdling tunnels that can cause dieback and kill trees. Similar to the Fir engraver.

Scale

Are sap-sucking insects common on backyard trees and ornamental shrubs. These pests are mostly immobile and appear similar to shell-like bumps rather than insects.

Gypsy moth

Brought to US from Eurasia to breed hardier silk worm; $500 mil spent on control; lack of natural predators in US, an exotic species( One of the 4 main factors reducing biodiversity). The caterpillars defoliate trees, leaving trees vulnerable to diseases and other pests and can eventually kill the tree.

Chemical damage

Damage caused by any chemical (smoke, herbicides, etc.) that breaks down cells or the connections between cells, which can cause discoloration and wilting. Most trees can recover but persistent damage can shorten lifespans.

Landscape equipment damage

Damage caused by landscaping equipment, exposing bark to more harmful insects and diseases.

Douglas fir tussock moth

Damage from severe defoliation can lead to tree death or predispose trees to subsequent bark beetle attack. It can be one of the most damaging of western defoliators.

Sunscald

Damage to plant tissue, especially bark or fruit, caused by exposure to excessive sunlight.

Mechanical damage

Damage to plants includes any activity that damages the roots, root collar, stem, branches or leaves. Damage to the roots, root collar or stem can manifest as crown dieback and leaf dieback. Caused by man-made machinery.

Lightning damage

Electrical Resistance causes sap to be heated explosively into steam, which blows off the bark outside the tree. Trees can overgrow the damaged area and may cover it completely, leaving only a vertical scar.

Spruce budworm

Insect attacks coniferous trees; Heavy defoliation can cause stunted growth and tree death

Asian Longhorn beetle

Native to China, Japan, and Korea Invasive from Asia Accidentally introduced into the United States, Canada, and W Europe in solid wood packaging material Impact: In the United States, it can potentially destroy ⅓ of urban trees; destructive wood-boring pest of maple and other hardwoods All infested trees are removed and chipped in place; insecticides have been used to target adults or larvae

Butt or heart Rot

One of the most common forms of tree, decay of the butts of trees. Caused when a fungi enters the trunk through wounds as a result of poor pruning, insects, fire etc.

Wetwood or slime flux

Slime flux, also known as bacterial slime or bacterial wetwood, is a bacterial disease of certain trees, primarily elm, cottonwood, poplar, boxelder, ash, aspen, fruitless mulberry and oak.

Hemlock woolly adelgid

Suspected to be brought to the United States by foreign trees ordered by Sallie Dooley for a Japanese garden A tiny brown bug-adults look like a fleck of cotton Feeds on species of hemlock and spruce trees To move, they cling to the legs and feathers of migrating birds Females are asexual- they can genetically clone themselves up to 90,000 times a year People didn't worry about the bugs, but then they caused a lot of damage

Climatic Injury: snow, wind, frost, drought, hail

Temperature fluctuations can cause damages like frost cracks, which can result when the temperatures drop sharply. Sunscald can also occur, and like frost cracks, often appear on the sun-facing side of the tree. Other damages such as wind and hail may occur

Tent caterpillar

The larvae cause extensive damage by defoliating mature trees, especially black cherry.

Sawfly

The larvae feed on both new and old needles and attack trees of all sizes. They defoliate one branch before moving to another. Larvae can completely defoliate trees.

Fire Damage

There are various levels of damage: it can completely or partially consume them, dry them out and scorch them, or simply singe them.

Emerald ash borer

Transported by firewood shipments. Native to Asia. Bright Green and feeds on Ash. Primary killer in North American ash trees.

Rust

Tree rust is a fungal infection that attacks trees, with a particular focus on their leaves. There are thousands of different species of rust fungi, each of which is suited to a different type of plant.

Canker

Typically, they appear as localized, sunken, slightly discolored, brown-to-reddish lesions on the bark of trunks and branches, or as injured areas on smaller twigs. Can be the result of insects, fungi, or abiotic factors such as hail

Damping off

a fungal disease that causes the stems to rot off at the soil line

Cicada

any large homopterous insect of the family Cicadidae, Tree damage from these insects occurs during the egg laying process. The female lays her eggs under the bark of a twig or branch. The twig splits and dies, and the leaves on the twig turn brown. This condition is called "flagging". You can spot flagging twigs and branches at a glance because of the contrast of brown leaves against the healthy green leaves on other branches.

Fir engraver beetle

large black bug that makes tunnels inside trees, weakening it

Nematode

reduce tree vigor and crop yields by parasitizing tree roots; they predispose trees to disease, reduce winter hardiness, and transmit viruses. Classified as a roundworm