Tiger mosquito risks identified in rainwater collectors

Rainwater collectors, commonly used to combat drought, are becoming breeding grounds for the tiger mosquito (Aedes albopictus), which is already established in 81 French departments. The insect thrives in small amounts of warm, stagnant water, with a single female capable of laying up to 200 eggs in just a few milliliters.

To prevent these containers from becoming nurseries, health authorities recommend continuous vigilance from mid-April to late October. Three critical areas must be inspected to block the mosquito's life cycle: the lid, the overflow system, and the gutter connection. Because the mosquito can lay eggs on dry surfaces just above the water line, subsequent rainfall can submerge the eggs and trigger larval development in less than a week.