Leaf Spot & Melting-Out Description:

Leaf spot and melting-out are turfgrass fungal diseases that can cause indefinite yellowing and thinning of grass, as well as large patches of dead turfgrass.


Cool-season turfgrasses, especially Kentucky bluegrass, are most susceptible to leaf spot and melting-out diseases. A landscape professional can tell you which turfgrass cultivars are most disease-resistant in your growing region.

Biology & Symptoms:

Prolonged periods of cool to warm and humid conditions can lead to these diseases, although the melting-out phase is often not evident until it’s warm and dry. Look for a yellow to rust-colored cast over all or part of the lawn, as well as yellow-brown spots with purple-black borders on grass leaves.


Follow a preventive maintenance program as prescribed by a certified arborist, including applying fungicides if appropriate. To help limit the severity of the disease, seed or sod with disease-resistant cultivars, remove excess thatch, never overfertilize and try not to water in the early evening.

See More Articles

Armyworms Banner 1440X500
Brown, Spotted, or Patch Grass on Lawn

Fall Armyworms

Fall armyworm caterpillars eat the leaves and stems of turfgrasses, but typically do not destroy the crown of the plant. Early feeding damage can resemble drought stressed turf, but can quickly progress to complete browning of the entire stand when caterpillars are present in large numbers.
Read More
Pest And Disease Center Anthracnose Disease Of Deciduous Trees Banner 1440X500
Mold or Fungus

Anthracnose Disease Of Deciduous Trees

Anthracnose is a common and destructive group of fungal pathogens that attack various shade trees.
Read More

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.

Let's Find What
You're Looking For!

Davey uses cookies to make your experience a great one by providing us analytics so we can offer you the most relevant content. By continuing to use this site, you accept our use of cookies. View our Privacy Policy for more information.