Tree Diseases: Lophodermium Needle Cast
Introduction Lophodermium needle cast is a fungal disease that affects two and three needled pines, as well as some five needled pines. The disease is…
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Tree Diseases: Elytroderma Needle Cast
Introduction Elytroderma needle cast, also known as Elytroderma disease, is a fungal disease of pine trees. It is especially common on ponderosa pine. Elytroderma needle…
Tree Diseases: Dothistroma Needle Blight of Pines
Introduction Dothistroma needle blight, often referred to as red band disease in the western United States, is a devastating foliar disease of pines. The causal…
Insect Profiles: Southern Pine Beetle (Dendroctonus frontalis)
Introduction Southern pine beetle (Dendroctonus frontalis) is a small insect that is native to North America. The insect is considered one of the most destructive…
Tree Diseases: Annosum Root Rot
Introduction Annosum root rot, also referred to as annosus root rot, is a fungal disease of pine, spruce, and fir trees. The causal agent of…
Tree Profiles: Saucer Magnolia Cultivars, Part 2
This is the second half of a two part series on saucer magnolia cultivars. Introduction Saucer magnolia is a popular selection for cultivation. Numerous cultivars…
Tree Profiles: Saucer Magnolia Cultivars, Part 1
This is the first half of a two part series on saucer magnolia cultivars. Introduction Saucer magnolia is a popular selection for cultivation. Numerous cultivars…
Tree Diseases: Rhizosphaera Needle Cast
Introduction Rhizosphaera needle cast is a fungal disease that affects many spruce trees, particularly Colorado blue spruce, and Engelmann spruce. The causal agent of the…
Tree Diseases: Pine Wilt Disease
Introduction Pine wilt disease is an affliction of pine caused by the pine wood nematode, Bursaphelenchus xylophilus. The pine wood nematode is a microscopic parasite.…
Tree Diseases: Pine Needle Rust
Introduction Pine needle rust is a fungal disease that affects many species of pine. The disease is caused by over twenty species of Coleosporium fungi.…
Tree Diseases: Brown Spot Needle Blight
Introduction Brown spot needle blight is a fungal disease of pine trees. The disease is caused by the pathogen, Mycosphaerella dearnessii. The damage produced by…
Insect Profiles: Japanese Beetle (Popilla japonica)
Introduction Japanese beetle (Popilla japonica) is a long, green beetle that is native to Japan. It is considered one of the most devastating pests of…
Insect Profiles: Bagworm (Thyridopteryx ephemeraeformis)
Introduction Bagworm (Thyridopteryx ephemeraeformis), also referred to as eastern bagworm, common bagworm, common basket worm, North American bagworm, or evergreen bagworm, is a native insect…
Insect Profiles: Cooley Spruce Gall Adelgid (Adelges cooleyi)
Introduction Cooley spruce gall adelgis (Adelges cooleyi) is a small black insect native to North America. The insect causes the formation of galls on several…
Disease Profiles: Powdery Mildew
Introduction Powdery mildew is a fungal disease that affects a wide range of plants. It is caused by numerous fungi in the order Erysiphales, of…
Insect Profiles: Black Vine Weevil (Otiorhynchus sulcatus)
Introduction Black vine weevil (Otiorhynchus sulcatus), also referred to as vine weevil or taxus weevil, is a serious pest of ornamental plantings. The insect is…
Insect Profiles: White Pine Weevil (Pissodes strobi)
Introduction White pine weevil (Pissodes strobi) is an insect that attacks and deforms at least twenty different tree species. The insect is sometimes referred to…
Tree Profiles: Saucer Magnolia (Magnolia x soulangiana), Part 2
This is the second half of a two part series on saucer magnolia. The following examines the cultivation of the tree, as well as its…
Tree Profiles: Saucer Magnolia (Magnolia x soulangiana), Part 1
This is the first half of a two part series on flowering dogwood. The following examines the tree’s distribution and habitat, developmental traits, longevity, height,…
Insect Profile: Eastern Spruce Gall Adelgid (Adelgis abietis)
Introduction Eastern spruce gall adelgid (Adelgis abietis) is an insect that inflicts considerable damage to ornamental spruce trees. The larvae induce the formation of cone-like…