Flea pupae emergence occurs in how many days?

• A. 5-10
• B. 7-14
• C. 14-28
• D. 30-40

Answer: (B)

Flea pupal emergence is driven by cues that indicate a host is nearby, so the pupae stay in their cocoons until they sense warmth, movement, or carbon dioxide. Under typical indoor conditions, this readiness period resolves in about 7 to 14 days after the cocoon forms. This window reflects the common timeframe you’ll see in pest-control settings, where moderate temperatures and humidity help trigger emergence without extreme delays. If conditions are cooler or drier, emergence can be delayed beyond two weeks; if cues are strong and conditions warm, emergence can occur toward the shorter end of the range. So, 7–14 days best fits the usual timing for flea pupae to emerge.