For cat fleas in the larval stage, which developmental stage would an insect growth regulator (IGR) prevent them from becoming?

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Prepare for the General Household Pest Control Exam with multiple choice questions, flashcards, and detailed explanations. Enhance your knowledge and increase your chances of success!

Multiple Choice

For cat fleas in the larval stage, which developmental stage would an insect growth regulator (IGR) prevent them from becoming?

Explanation:
IGRs disrupt metamorphosis by mimicking juvenile hormone, so immature insects are prevented from molting to the next stage. For fleas, the developmental sequence is larva, then pupa, then adult. When a larva is exposed to an IGR, the molt to the pupal stage is blocked, so it cannot reach the pupal stage. Without becoming a pupa, it cannot progress to the adult stage later. Eggs aren’t the target of this disruption, and the immediate block occurs at the larva-to-pupa transition, making the pupal stage the one they’re prevented from reaching.

IGRs disrupt metamorphosis by mimicking juvenile hormone, so immature insects are prevented from molting to the next stage. For fleas, the developmental sequence is larva, then pupa, then adult. When a larva is exposed to an IGR, the molt to the pupal stage is blocked, so it cannot reach the pupal stage. Without becoming a pupa, it cannot progress to the adult stage later. Eggs aren’t the target of this disruption, and the immediate block occurs at the larva-to-pupa transition, making the pupal stage the one they’re prevented from reaching.

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