Abstract
Electrophysiological investigation of the antenna of the onion fly, Hylemya antiqua MEIGEN was made in relation to the specific oviposition stimulativeness of the propylthio compounds. 1. The compounds with a propylthio moiety elicited high electroantennogram (EAG) respones in general, though some non-stimulants also raised high EAG resopnses. 2. EAG responses for sulfur compounds were similar to those obtained with single cell recordings from DNPD cells, a group of cells characterized by resonsiveness to dipropyl disulfide. 3. Analysis of dose-EAG response regression lines for obiposition stimulants and related non-stimulants indicated that all oviposition stimulants are received by the same receptor. 4. It was thus concluded that the specific oviposition stimulativeness of the propylthio compounds can be explained in part by the specificity of olfactory receptors on the antenna.
