How many generations of Nantucket pine tip moth are there per year?

How many generations of Nantucket pine tip moth are there per year?

• A. One
• B. Two
• C. Three
• D. Four

Answer: (B)

Nantucket pine tip moth goes through distinct life cycles that fit into a single growing season. In Maryland’s climate, you typically see two complete generations each year. The first generation appears as adults in spring, lays eggs on new pine shoots, and the larvae feed in the tips. After they finish, they pupate and another wave of adults emerges later in the season, starting a second round of egg laying and tip-feeding. The year ends with winter stopping further development, so a full third generation is not common here, though it can occur in unusually mild or warmer regions. That pattern—an early-season brood followed by a later-season brood—is why the standard answer is two generations per year.

Nantucket pine tip moth goes through distinct life cycles that fit into a single growing season. In Maryland’s climate, you typically see two complete generations each year. The first generation appears as adults in spring, lays eggs on new pine shoots, and the larvae feed in the tips. After they finish, they pupate and another wave of adults emerges later in the season, starting a second round of egg laying and tip-feeding. The year ends with winter stopping further development, so a full third generation is not common here, though it can occur in unusually mild or warmer regions. That pattern—an early-season brood followed by a later-season brood—is why the standard answer is two generations per year.