Tree Profiles: Red Maple (Acer rubrum), Part 1
This is the first half of a two part series on red maple. The following examines the tree’s developmental traits, distribution and habitat, longevity, height,…
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Common Tree Diseases: Dogwood Anthracnose
Dogwood anthracnose is a common tree disease of flowering and Pacific dogwood. The origin of the disease is unknown, but it is believed to have…
Gypsy Moth Outbreak in Massachusetts
Earlier this year, Massachusetts, Rhode Island, and Connecticut were beset by the most severe outbreak of gypsy moth since 1981. The rapacious insects were especially…
Common Tree Diseases: Types of Anthracnose
Anthracnose is a general term used to describe various diseases that occur on many deciduous and evergreen tree species. The following examines the most common…
Common Tree Diseases: Anthracnose
Anthracnose is a group of fungal diseases that affect many deciduous and evergreen tree species. It causes dark sunken lesions to appear on leaves, stems,…
ANSI A300 Standards for the Tree Care Industry Parts 7-9: Integrated Vegetation Management, Root Management Standard, and Tree Risk Assessment
The tree care industry has its own set of voluntary consensus standards called the ANSI A300 standards. They are generally accepted to be the industry…
ANSI A300 Standards for the Tree Care Industry Parts 4-6: Lightning Protection Systems, Management of Trees and Shrubs During Site Development, and Planting and Transplanting
The tree care industry has its own set of voluntary consensus standards called the ANSI A300 standards. They are generally accepted to be the industry…
ANSI A300 Standards for the Tree Care Industry Parts 1-3: Pruning, Soil Management, and Supplemental Support Systems
The tree care industry has its own set of voluntary consensus standards called the ANSI A300 standards. They are generally accepted to be the industry…
ANSI Z133 Safety Standard for the Tree Care Industry
The ANSI Z133 Safety Requirements for Arboricultural Operations, often referred to as the Z133 Safety Standard, are the accepted safety standards for the tree care…
ANSI Standards
The American National Standards Institute (ANSI) was founded in 1918 as a private, non-profit membership organization dedicated to promoting voluntary consensus standards. The purpose of…
Twelve Most Frequently Cited OSHA Standards
In the United States, the Occupational Safety and Health Administration (OSHA) is a federal agency responsible for establishing safety standards within various industries. Their mission…
OSHA Laws and Regulations
The Occupational Safety and Health Administration (OSHA) is a subset of the United States Department of Labor. It was created in 1970 as a result…
Mature Trees and Environmental Stressors
As trees mature, they reach the pinnacle of their productive capabilities. But aging is not without its caveats. The older a tree gets, the more…
Nutrient Deficiencies in Trees: Observing Visual Symptoms – Part Two
When attempting to diagnose a nutrient deficiency, trees should be inspected for visual symptoms. The following explores some of the symptoms associated with nitrogen, phosphorous,…
Nutrient Deficiencies in Trees: Observing Visual Symptoms – Part One
When attempting to diagnose a nutrient deficiency, trees should be inspected for visual symptoms. The following explores some of the symptoms associated with boron, calcium,…
Diagnosing Nutrient Deficiencies in Trees
Nutrient deficiency is a common affliction that affects deciduous and evergreen trees. Trees that become nutrient deficient often experience a drastic reduction in their functional…
Abiotic and Biotic Factors in the Environment
Ecosystems are comprised of living and non-living components. In biology and ecology, these components are referred to as abiotic and biotic factors. These two types…
Dr. Alex Shigo: A Short Biography
Dr. Alex Shigo was a renown biologist and plant pathologist. He is widely considered the father of modern arboriculture. Shigo’s study of trees and their…
Common Tree Defects: Co-dominant Stems
From decaying limbs, to weak branch unions, trees can develop a wide range of defects. Co-dominant stems are the one of the most common. The…
What to Do About a Dying Tree
Landscapes are often replete with trees, many of which flourish, expanding outwards as they develop. But there are occasions when a tree can become stressed,…