Ash

Fraxinus

Fraxinus, commonly called ash, is a genus of plants in the olive and lilac family, Oleaceae, and comprises 45–65 species of usually medium-to-large trees, most of which are deciduous trees, although some subtropical species are evergreen trees. The genus is widespread throughout much of Europe, Asia, and North America.

Description Resource

Diseases Affecting Ash

Bacterial Leaf Scorch

Disease

Leaf scorch, sometimes called marginal leaf burn, describes the death of tissue along the edge of the leaf. This symptom develops when sufficient water does not reach the leaf margin cells. This can occur if 1) there is insufficient moisture in the soil 2) water is lost too quickly from the leaves to be replaced…

Affected Species:

Oak

Bacterial Leaf Scorch Download

Ash Yellows

Disease

Ash yellows is a disease caused by Candidatus fraxinii, which affects the tree’s vascular system or its’ phloem sieve tubes. It is presently only found in North America. Ash yellows disease cycle is still a mystery. Experts think it is transmitted by insect vectors such as leaf hoppers which also transmit viruses.

Affected Species:

Ash

Ash_Yellows_and_Decline Download

Anthracnose

Disease

Many deciduous hardwoods are susceptible to a leaf disease called anthracnose that is caused by various species of the fungus Anthracnose.

Affected Species:

Ash, Beech, Birch, Dogwood, Hornbeam, Maple, Oak, Sycamore / Planetree

Anthracnose_On_Shade_Trees Download

Ash Rust

Disease

Ash rust is a common fungal disease of all species of ash trees. The disease is rarely destructive enough to warrant special control measures.

Affected Species:

Ash

Ash_Rust Download

Insects Affecting Ash

Lilac Borer

Insect

Adult lilac (ash) borers are moths that vary in color from brown to yellow to orange. They have clear wings…

Affected Species:

Lilac, Ash

Lilac (Ash) Borer Download

Ash — planthealthcare emeraldashv3 768x512 — Emerald Ash Borer and telltale larvae trail damage.

Emerald Ash Borer

Insect

Emerald Ash Borer (EAB) is a destructive, introduced insect of North American ash trees. It has been the cause of widespread ash tree decline and mortality throughout northeastern North America.

Affected Species:

Ash

Emerald_Ash_Borer Download

Please give us a call if you have any questions about your trees and shrubs or would like to schedule an appointment for us to walk your property.

610.525.1562