Turf disease is a common problem in Bend's cool, dry climate. Here is how to identify the most common lawn fungus problems in Central Oregon and what to do about them.
Central Oregon's climate — cool nights, warm days, and dry summers with overhead irrigation — creates conditions that favor several common turf diseases. Identifying the specific disease is the first step to effective treatment.
The most common lawn diseases we treat in Bend are dollar spot, brown patch, necrotic ring spot, rust, and red thread. Each has distinct visual characteristics and requires a different treatment approach.
Dollar spot is the most common turf disease we see in Bend. It appears as small, bleached tan spots about the size of a silver dollar, often with a reddish-brown border. In severe cases, spots merge to create larger dead areas.
Dollar spot thrives in conditions of low soil moisture, low nitrogen fertility, and cool nights with heavy dew. It is most active in late spring and early fall in Bend.
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Necrotic ring spot is a serious disease of Kentucky bluegrass that causes circular dead rings in the lawn. It is caused by a soil-borne fungus that attacks grass roots and crowns, making it difficult to treat once established.
The disease is most visible in summer when heat stress compounds the root damage. Rings may be 6 inches to 3 feet in diameter and often have green grass in the center (frog-eye pattern).
The best defense against lawn disease in Bend is proper cultural practices that reduce the conditions that favor fungal growth:
Watering in the morning is the single most important practice — it allows grass to dry before nightfall, dramatically reducing the leaf wetness that most fungal diseases require to spread.
Fungus treatment at Newport Avenue Landscaping is priced based on the disease type, lawn size, and severity. Most residential treatments range from $150–$400 for a standard fungicide application. Severe or recurring infections may require 2–3 applications spaced 14–21 days apart. We identify the specific disease before recommending a treatment plan.
Yes — consumer-grade fungicides are available at garden centers and can be effective for mild cases. However, correct identification of the disease is critical — different diseases require different active ingredients. Misidentification leads to wasted money and continued disease spread. For severe or recurring problems, professional treatment with commercial-grade products is more effective.
Recurring fungal disease usually indicates an underlying cultural problem: overwatering, evening irrigation, excessive thatch, compacted soil, or improper fertilization. Treating the fungus without addressing the underlying cause will result in the disease returning each season. We can evaluate your lawn care program and recommend changes to reduce disease pressure.
Turf diseases are generally specific to grass species and do not spread to ornamental plants, trees, or shrubs. However, some soil-borne pathogens can affect multiple plant types. If you notice unusual symptoms on non-grass plants near a diseased lawn area, contact us for a diagnosis.
Call us at (541) 617-8873 or fill out our contact form for a free consultation.
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