Padronização e implementação do uso de armadilhas de oviposição nas ações de monitoramento do mosquito Aedes aegypti (Diptera: Culicidae) no município de Natal, RN

Abstract

The ovitrap, or oviposition trap, is one of the tools recommended by the Ministry of Health as a complement to the methods of surveillance of Aedes aegypti. This trap is for the collection of eggs of A. aegypti. The efficiency of this trap can be enhanced by the addition of organic infusions. The objective of the present study was to standardize the application of this monitoring methodology for the city of Natal-RN in the monitoring actions of A. aegypti. For this, tests were performed to standardize the installation radius of the ovitraps, where distances of 150 and 300 meters were tested in two districts of Natal (Tirol and Quintas), these distances were alternated weekly for 2 months (July and August). Infusion attractiveness tests were performed in laboratory and field. The infusions tested were: grass, young leaves of cashew, hay and water, as control. In the laboratory the tests were done with 100 females of A. aegypti (10 in each cage), with duration of 3 days. The field was used 36 ovitraps, distributed in the UFRN, where they were monitored for 10 days, counting the eggs and changing the straws daily. As a result of the best radius, it was seen that there was no significant difference between the distances for any index searched (IDO, IPO, IMO). About the infusion tests, in the laboratory the amount of eggs in the cashew infusion was higher than all other treatments. In the field, the hay was the best treatment, but did not show statistical difference with water, only with the others, and no difference was observed between the days of laying.