ABSTRACT. Field evaluation against lethal ovitrap (LO) to control dengue vector Aedes mosquitoes carried in
two endemic areas (Bojongsari and Ledug) in Banyumas. Lethal ovitrap made ?with the intent to kill mosquito,
because mosquitoes will lay eggs containing ovistrip contact with the insecticide and the relatively short time to
die.The aim of research to assess the effect of LO applications with the Aedes of mosquito populations sp. This
study includes a quasi experimental design with pretest-posttest control group without randomization. Research
sites in dengue endemic areas with a total sample of 100 houses in each treatment and control areas. Populations
of Aedes sp measured every week for three weeks prior to the intervention and twelve weeks during the
intervention. The mean density of Aedes sp compared before and after intervention and between the treatment and
control. Results showed mean mosquito density before and after the intervention in the treatment group of 0.07
(p-value 0.044), whereas in the control group by 0037 ( p-value 0341). Use LO made ?with the addition of
insecticide active cypermetrin on ovistrip impact on the density of Aedes sp in the residential neighborhood.
Keywords: lethal ovitrap, DHF, Aedes sp