CDFA Pest Prevention Plant Regulation Practice Exam

During an inspection of tomato plants, where would you likely find the larva of the Colorado potato beetle?

1. In soil about the roots

2. On leaves and stems of plants

3. In the stems

4. Under the leaves

The correct answer is: On leaves and stems of plants

The Colorado potato beetle is known for its life cycle and behavior, particularly during its larval stage. The correct answer highlights that the larvae are typically found on the leaves and stems of plants. This is because they primarily feed on the foliage and stem tissues of solanaceous plants, which include tomatoes. When the beetles lay eggs, those eggs hatch into larvae that then immediately seek out the tender plant parts to consume. The leaves provide the necessary nutrients for their growth, making it essential for them to remain on the plant rather than moving to the ground or within the stems. Finding the larvae specifically on the leaves and stems allows for effective monitoring and control of this pest, as managers can target these areas for treatments such as insecticides or biological controls. This choice accurately reflects the ecological habits of the Colorado potato beetle, which is critical for pest management strategies in crops like tomatoes.