June 11, 1999

Looking Out for Common Diseases on Your Lawn


Just a quick reminder on common lawn diseases that you might encounter as we head into the summer season. For diseases with an irregular pattern, be on the lookout for powdery mildew, rust, and leaf spot or melting out. Here are a few quick visual diagnostic tips for these diseases:

Powdery mildew - dusty white to light gray powder on leaf surfaces; leaf yellowing Rust - From a distance, turf appears orange to rusty in color. On close examination, leaf blades have bright orange to reddish-brown pustules.

Peach Leaf Curl


Peach leaf curl has been a common disease problem this spring. As new leaves emerge and expand, they become puckered, curled, thickened, and often turn red or purple. Later in the season, upper surfaces of infected leaves turn gray. Infected leaves may wither and fall off in warm, dry weather.

Infection occurs as buds begin to swell and open in the spring. Spores of the fungus, which overwinter on bark and bud scales, wash onto the young leaf tissue in wet weather and initiate infections. Peach leaf curl tends to be most severe when buds open and leaves expand during wet periods.

Perennial Vines


Vines add interest to all gardens. They offer a wide variety of leaf forms, textures, and colors as well as attractive flowers or fruit. Perennial vines do not need replanting every year and can be used as a screen and to provide shade, fragrance, or fruit. They are often incorporated into gardens along walls, fences, trellises, arbors, or in containers to add height quickly in a limited space.

Summer Lawn Care


The cool, rainy weather in April and May was ideal for the cool season turfgrasses. As we move from spring to summer, temperatures rise and the rains typically become less frequent. Growing conditions become less favorable and turfgrass growth slows. Hot, dry weather can cause considerable stress for the cool season grasses. However, proper care during stressful periods can help to maintain a healthy, good quality lawn.