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Training

  • Arborists and Biochar
    March 16, 2026

    Rebuilding Urban Soils: What Arborists Need to Know About Biochar

    By Zack Shier, BCMA, and Lindsey Purcell, BCMA

    A large-chip biochar, showing the carbon framework of tree rings. Photo courtesy of Zack Shier. Urban forests are critical to the resilience and sustainability of our cities and towns, offering ecosystem services such as temperature regulation, air and [...]

    read more
  • Stop Pruning Malpractice
    March 13, 2026

    Stop Pruning Malpractice with a Prescription

    By Kristoffer Rasmussen, CTSP

    Reduction cut. All photos courtesy of the author. Merriam-Webster Dictionary defines malpractice as “a dereliction of professional duty or a failure to exercise an ordinary degree of professional skill or learning by one rendering professional services, which results [...]

    read more
  • Cankers and tree rot
    February 16, 2026

    Cankers That Rot and Impact Tree Stability

    By Christopher J. Luley, Ph.D.

    Photo 1. Canker rots typically decay the heartwood and sapwood before they kill the bark and cambium and cause cankers. Note the depressed face of the stem, and that the decay tree has reacted by forming wound wood on [...]

    read more
  • PHC Programs
    February 12, 2026

    PHC Programs Aren’t “Seasonal”

    By JOHN ROGALSKY

    The Rick's Certified Arborists crew. “But what are you going to do during the winter?” was the question that always followed the words of encouragement from friends in the industry after we first started Rick’s Certified Arborists. While [...]

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  • Box Tree Moth
    February 12, 2026

    The Box Tree Moth: Coming Soon to a Neighborhood Near You!

    By MICHAEL J. RAUPP, PH.D., AND PAULA M. SHREWSBURY, PH.D.

    Distribution, Biology and Management of a Fast-Moving Invader Photo 1. Adult box tree moths have white bodies with brown heads. Wing markings are variable, often with large white central patches bordered by brown margins on both fore and hind [...]

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Latest Articles

  • Who Should Buy Used Tree Care Equipment, and Why?
    June 1, 2023|
  • “From Wasteland to Wonder: Easy Ways We Can Help Heal Earth in the Sub/Urban Landscape”
    March 18, 2026|
  • Rooted in Safety: An Arborist’s Work Across Training and Forensics
    March 17, 2026|
  • Rebuilding Urban Soils: What Arborists Need to Know About Biochar
    March 16, 2026|
  • Stop Pruning Malpractice with a Prescription
    March 13, 2026|
  • Registered Apprenticeship: Putting the Model to Work
    March 12, 2026|
  • Safety by Design: Developing Arborists Through Apprenticeship
    March 11, 2026|

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