Insect Profiles: Box Elder Bug (Boisea trivittata)
Introduction Box elder bug (Boisea trivittata) is a North American species of true bug in the family Rhopalidae. The insect is native to the western United States, where it frequently…
Insect Profiles: Tolype Moth (Tolype velleda)
Introduction Tolype moth (Tolype velleda), also called large tolype moth and velleda lappet moth, is a small to medium sized moth in the family Lasiocampidae. Tolype Moth feeds on a…
Tree Diseases: Scleroderris Canker of Conifers (Gremmeniella abietina-Sclreoderris lagerbergii)
Introduction Scleroderris canker is a fungal disease that affects various conifers. It is caused by the fungus Gremmeniella abietina-Sclreoderris lagerbergii. Scleroderris canker is one of the most significant diseases of…
Tree Diseases: Fire Blight
Introduction Fire blight is a significant disease of various fruit trees. It is one of the most common diseases to afflict fruit trees in spring and summer. Apples, crabapples, and…
Tree Diseases: Apple Scab
Introduction Apple scab is a fungal disease that commonly infects various apple and crabapple trees. It is recognized as one of the most significant diseases of apples and crabapples. Apple…
Tree Diseases: Cedar-Hawthorn Rust
Introduction Cedar-hawthorn rust is a fungal disease that commonly infects junipers and hawthorns. It is one of the most frequently observed plant diseases in spring and summer. The disease is…
Tree Diseases: Cedar-Quince Rust
Introduction Cedar-quince rust is a fungal disease that infects most varieties of eastern red cedar, as well as many other junipers, and alternative hosts. The disease is caused by the…
Tree Profiles: Douglas-fir Cultivars, Part 2
This is the second of a two part series on Douglas-fir cultivars. Introduction Since its introduction to cultivation in 1826, Douglas-fir has become one of the world’s most popular trees.…
Tree Profiles: Douglas-fir Cultivars, Part 1
This is the first of a two part series on Douglas-fir cultivars. Introduction Since its introduction to cultivation in 1826, Douglas-fir has become one of the world’s most popular trees.…
Tree Profiles: Douglas-fir (Pseudotsuga menziesii), Part 2
This is the second of a two part series on Douglas-fir. The following examines seed propagation of Douglas-fir, its root system, preferred soil types, cultivation, damaging agents and pests, allergenic…
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