Aedes aegypti eggs oviposited on water surface collected from field ovitraps in Nova Iguaçu City, Brazil.

INTRODUCTION Aedes aegypti eggs can be collected from the water surface. METHODS Aedes aegypti oviposition from 97 field ovitraps was studied. RESULTS Of the 16,016 eggs collected, 11,439 were obtained from paddles in ovitraps and 4,577 from water. Further, 89 (91.8%) traps contained eggs on water and 22 (22.7%) traps contained eggs only on water. CONCLUSIONS In field traps, Aedes aegypti females usually oviposit some eggs on water surface suggesting that they might also oviposit on water of some natural breeding, and this possibility needs to be investigated. Eggs oviposited on water need to be considered for collecting trap data.