How many generations of dogwood borer are there per year?

How many generations of dogwood borer are there per year?

• A. One, but eggs laid over several months
• B. Two
• C. Three
• D. Continuous

Answer: (A)

The main idea is that dogwood borer in Maryland has a univoltine life cycle—one generation per year. Adults emerge in spring and lay eggs over an extended period, not all at once, so eggs can be found on the bark across several weeks to months. After hatching, larvae bore into the wood, continue developing, and then overwinter as pupae or late instars, completing the cycle once each year. Because the cold winter and seasonal tree activity limit development, there isn’t a second generation or year-round reproduction in this region. This is why the statement that there is one generation per year, with eggs laid over several months, best fits the species’ pattern.

The main idea is that dogwood borer in Maryland has a univoltine life cycle—one generation per year. Adults emerge in spring and lay eggs over an extended period, not all at once, so eggs can be found on the bark across several weeks to months. After hatching, larvae bore into the wood, continue developing, and then overwinter as pupae or late instars, completing the cycle once each year. Because the cold winter and seasonal tree activity limit development, there isn’t a second generation or year-round reproduction in this region. This is why the statement that there is one generation per year, with eggs laid over several months, best fits the species’ pattern.