When do Japanese beetle adults begin to emerge?

When do Japanese beetle adults begin to emerge?

• A. Early July
• B. Late July
• C. June
• D. August

Answer: (A)

Emergence timing follows the beetle’s life cycle and warm soil conditions. Japanese beetles spend the winter as grubs in the soil, then pupate in spring. Adults come out once soils and air are warm enough, which in New Hampshire regions typically begins in early July. This marks the start of the flight and feeding period, and it’s the best time to start monitoring or control efforts. June would be earlier than usual in this area, while late July or August are later in the season when adults are already active.

Emergence timing follows the beetle’s life cycle and warm soil conditions. Japanese beetles spend the winter as grubs in the soil, then pupate in spring. Adults come out once soils and air are warm enough, which in New Hampshire regions typically begins in early July. This marks the start of the flight and feeding period, and it’s the best time to start monitoring or control efforts. June would be earlier than usual in this area, while late July or August are later in the season when adults are already active.