CULICOIDES RESPONSES TO 1-OCTEN-3-OL AND CARBON-DIOXIDE IN SALT MARSHES NEAR SEA ISLAND, GEORGIA, USA

The semiochemicals carbon dioxide (CO2) and 1-octen-3-ol (octenol) wer e evaluated as attractants at several release rates, alone and in comb ination, for the major coastal species of biting midges in Georgia: Cu licoides furens, C. hollensis and C. melleus (Diptera: Ceratopogonidae ). The data show that CO2 is an effective attractant for the females o f all three species, but each has a different response pattern. In con trast, octenol was an effective attractant only for C. furens, either alone or in combination with CO2; octenol had a repellent effect on th e other two species. The combination of octenol and CO2 had a synergis tic effect on the collections of C. furens.