What are the primary damage symptoms of Nantucket pine tip moth?

What are the primary damage symptoms of Nantucket pine tip moth?

• A. Forked leaders, reduced height growth, tip dieback
• B. Needle scarring
• C. Root rot
• D. Resin exudation

Answer: (A)

Nantucket pine tip moth damages the growing terminal shoot, and the larvae feeding inside the tip kill the apical meristem. This causes tip dieback and prevents normal elongation, so the tree’s height growth is reduced. As the damaged terminal attempts to regrow, lateral buds can take over, producing two or more new leaders and giving the shoot a forked appearance. These are the characteristic signs you’ll notice on young pines. Other symptoms like needle scarring, resin exudation, or root rot aren’t typical results of this pest. Needle scarring suggests different feeders on the needles, resin exudation points to other borers or cankers, and root rot is a soil-borne disease, not a shoot-tip damage pattern.

Nantucket pine tip moth damages the growing terminal shoot, and the larvae feeding inside the tip kill the apical meristem. This causes tip dieback and prevents normal elongation, so the tree’s height growth is reduced. As the damaged terminal attempts to regrow, lateral buds can take over, producing two or more new leaders and giving the shoot a forked appearance. These are the characteristic signs you’ll notice on young pines.

Other symptoms like needle scarring, resin exudation, or root rot aren’t typical results of this pest. Needle scarring suggests different feeders on the needles, resin exudation points to other borers or cankers, and root rot is a soil-borne disease, not a shoot-tip damage pattern.