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…
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…
Tree Diseases: Oak Wilt
Introduction Oak wilt is an aggressive tree disease that affects many species of oak. The causal agent of oak wilt is the fungus Ceratocytis fagacearum. Ceratocytis fagacearum is believed to…
Tree Diseases: Armillaria Root Rot
Introduction Armillaria root rot, also called fungal root rot, or Armillaria root disease, is a plant disease caused by several members of the genus Armillaria. The fungus most often identified…
Tree Care in Winter: Winter Injury on Evergreens
Introduction During the winter months, various cold-related injuries may be observed on evergreens. These cold-related injuries, also referred to as winter injuries, encompass a broad range of seasonal challenges. The…
Old Log Break Up Morsch Nature Injury Root Tree
Tree Care in Winter: Winter Injury on Hardwoods
Introduction In the tree care industry, winter injury is a general term that encompasses a slew of cold-related problems. Although more commonly observed on evergreens, winter injury can occur on…
Winter Tree Injuries: Winter Browning of Conifers
Introduction In late winter and early spring, foliar browning is common on many coniferous plants. Arbovitae, hemlock, juniper, pine, spruce, yew, boxwood, and rhododendron are especially prone to this type…
Tree Diseases: Crown Gall
Introduction Crown gall is a tree disease of many woody shrubs, and some herbaceous plants. The disease is caused by the bacterium Agrobacterium tumefaciens, a soil-borne bacterium that is normally…
Tree Diseases: Bacterial Wetwood (Slime Flux)
Introduction Bacterial wetwood, often referred to as slime flux, is a bole rot that afflicts hardwood trees. The disease is associated with numerous bacteria, which infect the inner sapwood, and…
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