CDFA Pest Prevention Plant Regulation Practice Exam

What is a characteristic of the damage caused by the larvae of the pine-shoot moth?

1. Defoliation

2. Stunted Growth

3. Canker Formation

4. Galling of Shoots

The correct answer is: Galling of Shoots

The damage caused by the larvae of the pine-shoot moth is characterized by galling of shoots. This occurs when the larvae feed on the growing tips of pine trees, leading to swelling or distortion in the affected areas. The larvae typically bore into the shoots, causing them to become thickened and often resulting in a deformed appearance. This galling effect can hinder the tree's growth and overall health, as the affected shoots may not develop properly. The other potential damage types listed do not accurately describe the specific symptoms associated with pine-shoot moth larvae. Defoliation generally refers to the loss of leaves, which is not the primary concern with these larvae. Stunted growth may occur over time due to overall tree stress, but it is not a direct characteristic of their feeding behavior. Canker formation is associated with infections or wounds rather than the galling specifically caused by the larvae. Thus, the unique symptom of galling differentiates the pine-shoot moth's impact from these other forms of damage.