CDFA Pest Prevention Plant Regulation Practice Exam

During winter, in which stage does the white-fringed beetle overwinter?

1. adult stage

2. pupal stage

3. larval stage

4. egg stage

The correct answer is: larval stage

The white-fringed beetle, particularly known for its pest status, undergoes winter in the larval stage. This is significant because during colder months, larvae are more likely to survive the harsh conditions compared to other stages. The larval stage allows them to find shelter in soil and organic matter, providing insulation and protection from freezing temperatures. Understanding the life cycle of the white-fringed beetle is crucial for effective pest management, as recognizing the overwintering stage informs strategies for control and prevention in the following growing season. This knowledge helps agricultural professionals anticipate population dynamics and implement appropriate practices to mitigate damage caused by these pests. In contrast, the other stages—adult, pupal, and egg—are less suited for survival during the winter months in typical environments where white-fringed beetles are found. Adults may seek shelter, but they are more vulnerable to extreme conditions than larvae. Pupae, being in a transitional form, lack the resilience of larvae, and eggs would not have developed enough to withstand cold temperatures effectively. Therefore, the focus on the larval stage as the overwintering phase highlights its survival strategy and relevance in pest management practices.