What is the Lifecycle of fleas?

You must keep in mind the life cycle of the flea. From egg to larvae to adult is between three to six weeks: to get rid of fleas in your house, you must break this cycle. As a practical matter, this means you will almost certainly have to repeat your efforts in several weeks to catch the fleas from the larvae that didn't get destroyed the first time around. This is also why it is important to address the problem of the eggs and larvae as well as the adult fleas.

After taking a blood meal, fleas either lay eggs on your pet or in its surrounding environment. Eggs on your pet are often shed onto its bedding or into the carpet. A pair of fleas may produce 20,000 fleas in 3 months. Eggs hatch after 2-12 days into larvae that feed in the environment -- generally on digested blood from adult fleas and other food matter in their environment. The food required at this stage is microscopic, and even clean carpets often offer plenty of food to the larvae. The larvae are little wiggles about 3-4 millimeters long, you may see some if you inspect your pet's bedding carefully. Larvae molt twice within 2-200 days and the older larvae spin a cocoon in which they remain for one week to one year. When in this cocoon stage the young flea is invulnerable to any kind of insecticide and to low, even freezing, temperatures. Only sufficient warmth and the presence of a host can cause them to emerge. This long cocooning period explains why fleas are so difficult to eradicate.



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