Insect & Disease
Resource Center

Signs of pests and diseases will vary from tree to tree. Search our database of pests and diseases for symptoms, damages, life cycle, management, and control information.

Home
Insect & Disease Resource Center

Search All Articles

Filters

Damage & Symptoms

Mold or Fungus

Gray Snow Mold

Gray snow mold is a fungal disease that attacks turfgrass in areas where there are extended periods of snow cover. It is easier to manage if treated in a timely manner but can be fatal to turfgrass if left untreated.

Leaf or Needle Discoloration

Pine Sawfly

Pine sawflies are conifer-feeding insects. They are categorized into two groups: spring species and summer species. Both feed on pine needles, causing the needles to turn yellow or brown. Sometimes the needles are completely consumed.

Pest And Disease Sod Webworm Banner 1440X5800

Webs or Bags

Sod Webworms

Sod webworms are grayish-green caterpillars with dark brown heads and brown spots along the length of their bodies. The caterpillars live in silken tunnels at the base of grass blades, feeding on the grass blades at night and hiding in their tunnels during the day.

Fusiform Rust Photo Arborist Advice Banner

Mold or Fungus

Southern Fusiform Rust

Southern fusiform rust is a fungal pathogen that causes trunk and/or branch swelling in pine hosts and rust on oak leaves.

Mold or Fungus

Tinder Fungus

Tinder fungus is a fungal species that produces large, porous fruiting bodies that often resemble a horse’s hoof. They vary in color, but are most commonly gray, black or brown. The body can be from 2-17 inches across, 1-10 inches wide and 1-10 inches tall.

Bumps or Blisters on Leaf or Needle

Ash Flower Gall

Ash flower gall is a symptom of feeding activity of microscopic mites known as ash flower gall mites.

Leaf or Needle Discoloration

Chlorosis

Chlorosis is the result of a lack of chlorophyll production that may be caused by many conditions such as another disease, soil/water pH or nutritional imbalance, or tree wounds.

Brown, Spotted, or Patch Grass on Lawn

Gray Leaf Spot Disease

Gray Leaf Spot (GLS) is a fungal disease that affects various turfgrasses. Lesions start as olive green to brown, water-soaked dots, no larger than a pinhead. As the infection progresses, the lesions become larger and ash-colored with purple to brown margins.

Previous
1
2
3(current)
4
5
6
7
...
16
Next

No Results

No results were found matching that query.

Get In Touch With Us!

We pride ourselves at Davey Tree on providing prompt, professional and personalized service from certified arborists that live, work and engage in your community. Contact one of our Davey Tree specialists for your residential needs.

Find A Local Office

Insect & DiseaseResource Center

Get In Touch With Us!

Insect & Disease
Resource Center