What effect does Nantucket pine tip moth damage have on tree height growth?

What effect does Nantucket pine tip moth damage have on tree height growth?

• A. Increases height growth
• B. Reduces height growth
• C. No effect on height growth
• D. Causes initial growth spurts followed by decline

Answer: (B)

Nantucket pine tip moth damage mainly reduces vertical growth by attacking the growing tips of pine shoots. The larvae bore into terminal buds and feed there, killing the apical meristem and interrupting the tree’s ability to elongate the leader. With the main growing tip damaged, the tree often produces new growth from lateral shoots instead, which grows much more slowly than a true leader, so annual height gain drops. Repeated damage over time compounds this effect, leading to shorter trees or visibly stunted height compared with undamaged trees. While deformation or multiple leaders can occur, the overall result is a decrease in height growth.

Nantucket pine tip moth damage mainly reduces vertical growth by attacking the growing tips of pine shoots. The larvae bore into terminal buds and feed there, killing the apical meristem and interrupting the tree’s ability to elongate the leader. With the main growing tip damaged, the tree often produces new growth from lateral shoots instead, which grows much more slowly than a true leader, so annual height gain drops. Repeated damage over time compounds this effect, leading to shorter trees or visibly stunted height compared with undamaged trees. While deformation or multiple leaders can occur, the overall result is a decrease in height growth.