Patch diseases will occasionally occur in bluegrass lawns. Areas of turf die in patches, hence the name. Advanced stages of the disease appear as rings of dead turf surrounding living turf that resembles a "frog's eye". Researchers have identified several fungi that cause patch-like symptoms.
Some of the more common patches include summer patch, yellow patch and necrotic ring spot.
Necrotic ring spot and yellow patch are active during cool weather in the spring and the fall, but patches may remain into the summer months. Summer patch is active during the summer period. Once established, these diseases are extremely difficult to control, and tend to occur in following years.
Red thread and pink patch are diseases that attack Kentucky bluegrass, fescues, rye grass, and bent grass. These diseases are active during the cool, moist periods of the year, causing distinct-to-irregular discolored patches to develop in lawns.
The leaves often become covered with a pink, fibrous growth. In the final stage, reddish fungal threads are found at the leaf tips. In a lawn infested with red thread or pink patch, pink areas from two to fifteen inches in diameter become readily apparent.
These spots may join to form large areas of damaged turf. Areas may turn brown and dry out. These diseases are most common under the combination of prolonged periods of high humidity, temperatures between 60?F to 75?F, and slow-growing, nitrogen-deficient turf.
To control red thread and pink patch,
Patch diseases will occasionally occur in bluegrass lawns. Areas of turf die in patches, hence the name. Advanced stages of the disease appear as rings of dead turf surrounding living turf that resembles a "frog's eye". Researchers have identified several fungi that cause patch-like symptoms. Some of the more common patches include summer patch, yellow patch and necrotic ring spot. Necrotic ring spot and yellow patch are active during cool weather in the spring and the fall, but patches may remain into the summer months. Summer patch is active during the summer period. Once established, these diseases are extremely difficult to control, and tend to occur in following years.Red thread and pink patch are diseases that attack Kentucky bluegrass, fescues, rye grass, and bent grass. These diseases are active during the cool, moist periods of the year, causing distinct-to-irregular discolored patches to develop in lawns. The leaves often become covered with a pink, fibrous growth. In the final stage, reddish fungal threads are found at the leaf tips. In a lawn infested with red thread or pink patch, pink areas from two to fifteen inches in diameter become readily apparent. These spots may join to form large areas of damaged turf. Areas may turn brown and dry out. These diseases are most common under the combination of prolonged periods of high humidity, temperatures between 60?F to 75?F, and slow-growing, nitrogen-deficient turf. ควบคุมด้ายสีแดงและสีชมพูปะ
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