The two (spring and summer) generations of Nantucket pine tip moth occur in which seasons?

The two (spring and summer) generations of Nantucket pine tip moth occur in which seasons?

• A. Spring and Summer
• B. Winter and Spring
• C. Summer and Fall
• D. Fall and Winter

Answer: (A)

Nantucket pine tip moth life cycles are tied to when pine shoots are actively growing. The insect overwinters as a pupa under the bark, and as spring warmth arrives, adults emerge, lay eggs on new growth, and the first generation develops on those growing tips. After finishing feeding, they pupate again, and a second generation follows during the period when new growth is available again—late spring into summer. This pattern makes spring and summer the seasons when there are two generations. The other options don’t fit because there isn’t a full generation built in winter (growth is dormant then), and fall isn’t aligned with the peak shoot growth needed to support a second wave of larvae.

Nantucket pine tip moth life cycles are tied to when pine shoots are actively growing. The insect overwinters as a pupa under the bark, and as spring warmth arrives, adults emerge, lay eggs on new growth, and the first generation develops on those growing tips. After finishing feeding, they pupate again, and a second generation follows during the period when new growth is available again—late spring into summer. This pattern makes spring and summer the seasons when there are two generations.

The other options don’t fit because there isn’t a full generation built in winter (growth is dormant then), and fall isn’t aligned with the peak shoot growth needed to support a second wave of larvae.