Seminar Dates: November 5, 2026 9:30 AM
Seminar Cost: $37.50 Register Now
Seminar Description:
Understanding the difference between biotic and abiotic tree disorders is fundamental to successful tree care. This seminar will guide attendees through the complex web of tree pest issues beginning with the basics: what constitutes a disorder and how to tell whether it’s caused by a living (biotic) or non-living (abiotic) agent. Insect pests and fungal pathogens will be discussed with real-world examples and tips on accurate identification. Attendees will also learn to recognize abiotic disorders such as nutrient deficiencies and mechanical injuries. The program concludes with practical, science-based pest management strategies—highlighting early detection, cultural practices, and treatment approaches that support long-term tree vitality.
Learning Objectives:
1. Distinguish between biotic and abiotic disorders affecting trees, including the role of insects, pathogens, nutrient imbalances, and mechanical damage.
2. Identify common pest-related symptoms and causal agents, with emphasis on insect pests and fungal diseases relevant to urban and landscaped environments.
3. Implement effective integrated pest management (IPM) strategies tailored to tree health, including accurate diagnosis, cultural practices, and appropriate treatment options.
Ken McCormick
Favorite tree: Quercus agrifolia, the Coast Live Oak. “I believe it should be California’s State Tree because its habitat is much larger than the Redwood. However, both can live thousands of years and are equally valuable.”
Ken’s roots are in South Carolina farmland, but his passion developed further at Sims Tree Learning Center. With over 16 years in the industry, Ken approaches arboriculture like a scientist with a punk-rock soul. “Everything about plants is biology. Just as our bodies need good bacteria and balanced microbiomes, so does the soil. Carbon is fiber for the Earth.”
He’s particularly passionate about the future of tree care: “There’s an investment into biological pest and disease treatment … bioinsecticides and strains of beneficials that can help repel or improve the health of plants, reducing the number of pesticides used in our industry.”
