CHT Arboriculture & Tree Care 2

Question 1

The 'drip line' of a tree refers to:

Accepted Answer

The outermost edge of the tree canopy projected onto the ground

Answer

The drip line is the circular area on the ground directly below the outermost branch tips of a tree, approximating the extent of the root zone.

Question 2

Girdling roots are a serious concern for trees because they:

Accepted Answer

Wrap around the trunk and restrict water and nutrient flow as the tree grows

Answer

Girdling roots encircle the trunk and progressively constrict vascular tissue as both trunk and root grow, eventually causing decline or tree death.

Question 3

What does 'CODIT' stand for in tree pathology?

Accepted Answer

Compartmentalization of Decay in Trees

Answer

CODIT (Compartmentalization of Decay in Trees) describes the natural defense mechanism trees use to wall off wounded and decaying tissue through chemical and structural barriers.

Question 4

Which tool is used to assess whether a tree's trunk is hollow or has internal decay?

Accepted Answer

Resistograph or mallet sounding

Answer

A resistograph measures drilling resistance to detect internal decay, and mallet sounding uses hollow vs. solid audio cues to locate internal cavities.

Question 5

Emerald ash borer (EAB) attacks ash trees by:

Accepted Answer

Larvae tunneling beneath the bark and destroying the cambium and phloem

Answer

EAB larvae feed on phloem and cambium tissue just beneath the bark in S-shaped galleries, disrupting water and nutrient transport and killing the tree.

CHT - Certified Horticultural Technician Practice Test

CHT - Certified Horticultural Technician Practice Test

CHT Arboriculture & Tree Care 2