Tree Diseases: Nectria Canker & Nectria Dieback
Introduction Nectria canker is one of the most serious diseases to afflict hardwood trees. The disease is caused by several species of Nectria. Nectria is a genus of Ascomycete fungi.…
Tree Diseases: Holly Leaf Spot
Introduction Holly leaf spot, also referred to as holly tar spot, is a fungal disease that affects holly plants. Holly tar spot induces the formation of black spots on the…
Tree Profiles: Sugar Maple Cultivars, Part 2
This is the second half of a two part series on sugar maple cultivars. Introduction Sugar maple is one the most frequently selected hardwoods for cultivation. The tree’s branch architecture,…
Tree Profiles: Sugar Maple Cultivars, Part 1
This is the first half of a two part series on sugar maple cultivars. Introduction Sugar maple is one the most frequently selected hardwoods for cultivation. The tree’s branch architecture,…
Tree Profiles: Sugar Maple (Acer saccharum), Part 2
This is the second half of a two part series on sugar maple. The following examines the tree’s soil and topography, cultivation, damaging agents and pests, allergenic potential, and many…
Tree Profiles: Sugar Maple (Acer saccharum), Part 1
This is the first half of a two part series on sugar maple. The following examines the tree’s distribution and habitat, developmental traits, longevity, height, bark, leaves, flowers, fruit, seed…
Insect Profiles: Red Pine Scale
Introduction Red pine scale is a small exotic insect that infests several species of pine. The insect’s preferred host is red pine. Red pine scale was first discovered in 1946,…
Disease Profiles: Maple Tar Spot
Introduction Maple tar spot is a fungal disease that affects many species of maple. The disease occurs most frequently in North America and Europe. It is caused by three related…
Insect Profiles: Isabella Tiger Moth (Pyrrharctia isabella)
Introduction Isabella tiger moth (Pyrrharctia isabella) is one of the most common insects in North America. It is recognized for its distinct coloration, and stiff bristles, which are soft to…
Insect Profiles: Ailanthus Webworm
Introduction Ailanthus webworm is an ermine moth commonly found throughout the United States. The insect originated in South Florida and the American tropics, where it infested two plants: paradise tree…
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