Lawn and Turf: Powdery mildew categories: Lawn and Turf Lawn and Turf Diseases revision date: 2022-10-28 12:28 Powdery mildewPowdery mildew Biology Powdery mildew is a fungal disease affecting the leaf blades. Bluegrasses and fescues are the most commonly affected lawn grasses. Blades and sheaths of older leaves are covered with mats of fine, white or […]
Lawn and Turf: Pythium crown and root rot categories: Lawn and Turf Lawn and Turf Diseases revision date: 2022-10-28 12:23 Pythium crown and root rotPhoto by: R.S. Byther Biology Pythium crown and root rot is caused by fungi which can also cause damping-off of new grass plantings. The rot causes a general decline of the […]
Lawn and Turf: Red thread categories: Lawn and Turf Lawn and Turf Diseases revision date: 2022-10-28 12:11 Red threadPhoto by: R.S. Byther Biology Red thread is a fungal disease common in cool, moist regions. It may occur on bentgrasses and bluegrasses, but is most common on red and chewings fescues and perennial ryegrasses. Infection can […]
Lawn and Turf: Rusts categories: Lawn and Turf Lawn and Turf Diseases revision date: 2022-10-28 11:56 RustPhoto by: R.S. Byther Biology Several species of fungi cause rusts of turfgrasses. Typical symptoms include yellow specks on the leaf blades followed by development of yellow, orange, dark orange-brown, or red rust pustules on either or both leaf […]
Lawn and Turf: Septoria leaf spot (Tip blight) categories: Lawn and Turf Lawn and Turf Diseases revision date: 2022-10-28 11:47 Septoria leaf spot (tip blight)Photo by: R.S. Byther Biology Septoria leaf spot is a fungal disease of the leaves of many grasses. Gray-green spots develop near the leaf tips, later fading to yellow then grayish-white. […]
Lawn and Turf: Slime molds categories: Lawn and Turf Lawn and Turf Diseases revision date: 2022-10-28 07:42 Slime moldPhoto by: R.S. Byther Biology Slime molds are related to fungi. They do not cause disease on turfgrasses as they feed only on decaying organic matter, but they can be an aesthetic concern. They emerge from the […]
Lawn and Turf: Take-all patch categories: Lawn and Turf Lawn and Turf Diseases revision date: 2022-10-28 07:34 Take-all patchesPhoto by: R.S. Byther Biology Take-all patch is a fungal disease common on bentgrass, particularly on young plants. Symptoms first appear in late spring as small, brown, dead areas of grass approximately 2″ in diameter. The patches […]
Lawn and Turf: Thatch categories: Lawn and Turf Lawn and Turf Diseases revision date: 2022-10-28 07:09 ThatchPhoto by: R.S. Byther Biology Thatch is a layer of plant debris which generally accumulates at the soil surface. It consists primarily of undecomposed stem, crown, and root materials. Grass clippings contribute little to thatch formation. In healthy lawns, […]
Lawn and Turf: Typhula blight (Gray snow mold) categories: Lawn and Turf Lawn and Turf Diseases revision date: 2022-10-28 07:02 Typhula blightPhoto by: R.S. Byther Biology Typhula blight is a fungal disease which can occur beneath snow cover on unfrozen soil. Under snow, light yellow to gray circular areas develop. These range in size up […]
Lawn and Turf: Yellow patch categories: Lawn and Turf Lawn and Turf Diseases revision date: 2022-10-28 06:55 Yellow patch fungal myceliumPhoto by: R.S. Byther Biology Yellow patch is a fungal disease which may affect bluegrasses, annual bluegrass, and bentgrasses. Symptoms are typically seen in fall, winter, and spring. Light brown to yellow patches and rings […]
Lawn and Turf: Sod webworm categories: Lawn and Turf Lawn and Turf Insects revision date: 2022-10-27 12:27 Sod webwormPhoto by: R.D. Akre Biology Sod webworms are the larval stage of lawn moths. The adults are slender, grayish-white to tan moths with a wingspan of approximately 1″. They typically fly at dusk in erratic patterns over […]