CDFA Pest Prevention Plant Regulation Practice Exam

In which of the following stages would the pickleworm and melonworm most likely be introduced?

1. Larval stage

2. Egg stage

3. Pupal stage

4. Adult stage

The correct answer is: Larval stage

The pickleworm and melonworm are introduced mainly in their larval stage because this is when they are actively feeding and causing damage to host plants, particularly cucurbits like cucumbers and melons. In many pest species, including these worms, the larvae are the most destructive life stage. They emerge from eggs laid by adult females and soon begin to feed on plant tissue, leading to significant agricultural damage. Identifying the correct stage for introduction helps in implementing effective pest management strategies, as targeting the larval stage can increase the efficacy of control measures. While the egg stage is critical for the life cycle, it is the larval stage that poses the greatest threat to crops. The adult stage is also significant, but it is less direct in terms of causing damage. The pupal stage is a transitional stage and does not involve feeding or directly affect plants. Understanding these life stages is essential for effective pest management.