Avoiding and Remedying Abiotic Injury of Trees

An abiotic disorder of a plant is considered a disease, but the cause is a non-living factor (abiotic), such as poor nutrition, sunscald, winter injury, misapplication of a chemical, planting depth, and more. It is imperative to recognize the difference between an abiotic and biotic (disease caused by a fungus, bacteria, or virus) disease so that a pesticide is not mistakenly applied.

This one-hour course is designed not only for landscape and ornamental pesticide applicators, but for anyone that grows or manages woody plants. Most content is focused on ornamental trees and shrubs, with some information that applies to crop trees (fruits, nuts).

The following subjects are covered:

• Understanding the difference between abiotic and biotic diseases
• Diagnosing abiotic diseases
• How stress (abiotic factors) affect trees
• Examples (with multiple images) showing abiotic diseases caused by weather, chemicals, physical/mechanical factors, and soil conditions. Some management practices for remediation are also included.
• Two sample diagnoses

CEU Currently Approved by Utah Only

You will receive 1 CEU credit in the Use category. Check with your state agency for CEU credit approval.

The course contains 18 learning pages. You must view all 18 pages to receive CEU credit toward the re-certification requirements. Once you have viewed the entire course, you will receive a certificate of completion. You must print the certificate to receive your CEU credits. You need to present your printed certificate to UDAF to receive credit for this course towards your CEU requirements. We do not send enrollment information to UDAF or any other agency. You are responsible for notifying your governing agency that you have taken this online course for CEU credits. The CEUs listed on the certificate are approved for the state of Utah. Check with your local agency for approval of CEU credits outside of Utah.