Free Certified Arborist Diagnosis and Treatment Questions and Answers

Question 1

The main purpose of wound dressing is:

Accepted Answer

To make the appearance better.

Answer

Scientific research has consistently shown that wound dressings do not effectively prevent decay, insect infestation, or disease in tree wounds. Their primary benefit, if any, is largely aesthetic, covering the wound and making it appear less conspicuous. In some cases, they can even hinder the tree's natural compartmentalization process, which is its own defense mechanism.

Question 2

Which condition listed below is an abiotic disorder?

Accepted Answer

Girdling roots

Answer

Abiotic disorders are caused by non-living factors, such as environmental conditions or cultural practices. Girdling roots are an abiotic disorder where roots grow around the trunk or other roots, constricting the flow of water and nutrients. In contrast, vascular wilt, mites, and nematodes are biotic disorders caused by living organisms.

Question 3

What is the primary objective of insect pest control in the Plant Health Care model?

Accepted Answer

Suppression

Answer

In the Plant Health Care (PHC) model, the primary objective of insect pest control is suppression, not eradication. PHC aims to manage pest populations to acceptable levels that minimize damage while preserving beneficial insects and the overall ecosystem. Complete eradication is often impractical, environmentally harmful, and unnecessary for plant health.

Question 4

What term is used to describe insects that carry plant pathogens?

Accepted Answer

Vectors

Answer

Vectors are organisms, typically insects, that transmit plant pathogens such as viruses, bacteria, or fungi from one plant to another. For example, aphids can act as vectors for plant viruses, and certain bark beetles can vector fungi that cause diseases like Dutch elm disease, facilitating the spread of disease.

Question 5

What is the term for plant growth regulators that inhibit the action of cell-elongating hormones?

Accepted Answer

Anti-Gibberellins

Answer

Anti-gibberellins are a class of plant growth regulators that inhibit the action of cell-elongating hormones called gibberellins. By doing so, they reduce shoot growth and often result in more compact plants. These regulators are used in arboriculture to manage tree size, reduce pruning needs, and improve overall plant form.

Certified Arborist Test Practice Test

Certified Arborist Test Practice Test

Free Certified Arborist Diagnosis and Treatment Questions and Answers