Insect & Disease Resource Center
Search Results
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Black Turpentine Beetle
The Black Turpentine Beetle is a common pest that affects pine trees throughout the United States.
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Boxwood Decline
Boxwood decline is a condition that causes weak growth, discoloring of leaves and branch dieback in boxwood shrubs. This condition usually involves several factors, including poor planting conditions and improper cultural practices, as well as stem and root diseases.
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Brown Patch Disease
Brown patch is a fungal disease that develops during the hot, humid conditions of summer, transforming a green lawn into one with circular brown patches a few inches to several feet in diameter. Infected grass turns a dark purplish-green before fading to light brown, and has a sunken or flattened appearance. You may still see some healthy, unaffected grass within a diseased area.
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Cedar Rust
There are multiple rust fungi that affect cedars (junipers): cedar-quince rust, cedar-hawthorn rust and cedar-apple rust. All of these rusts require two different hosts and alternate between them during the year. Cedar-quince rust appears as elongated branch swellings that produce orange spores.
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Conifer Bark Beetle
Conifer bark beetles are beetles (of varying species) that tunnel just beneath the bark of conifer trees. Bark beetles account for over 90% of insect-related timber losses in the United States.
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Cottony Maple Scale
The cottony maple scale is a large, flat, brown scale insect found on the twigs and branches of various trees. White, cottony egg masses that resemble popcorn are its most distinguishing feature.
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Cytospora Canker
The plant pathogenic fungus Leucostoma kunzei (formerly Valsa kunzei) is the causal agent of cytospora canker, a disease of some conifers found in the Northern Hemisphere, predominantly on Norway spruce (Picea abies) and Colorado blue spruce (Picea pungens).