J Insect Physiol 36: 951–957īogner F (1992) Response properties of CO 2-sensitive receptors in tsetse flies (Diptera: Glossina palpalis). J Insect Physiol 26: 493–498īogner F (1990) Sensory physiological investigation of carbon dioxide receptors in Lepidoptera. J Comp Physiol A 163: 641–650ījostad LB, Gaston LK, Shorey HH (1980) Temporal pattern of sex pheromone release by female Trichoplusia ni. Science 161: 1346–1347Īkers RP, O'Connell RJ (1988) The contribution of olfactory receptor neurons to the perception of pheromone component ratios in male redbanded leafroller moths. aegypti have morphologically similar sensilla which also contain a receptor neuron that responds to CO 2.Īcree F, Turner RB, Gouck HK, Beroza M (1968) L-Latic acid: a mosquito attractant isolated from humans. However, there is much interspecific variation in both the external morphology of the maxillary palp and the distribution of sensilla along the palp.
Females of other mosquito species, including: Anopheles stephensi, Culex quinquefasciatus, Culiseta melanura, and Aedes taeniorhynchus, also possess sensilla with receptor neurons that respond with comparable sensitivity to CO 2 stimulation. We report here that the response (impulses/s) to a single pulse of a given concentration of CO 2 appears to be independent of the background level of CO 2, unless that level is equal to or greater than the concentration of the stimulus pulse. We were particularly interested in evaluating the possibility that the sensitivity to step increases in CO 2 concentration could be modulated by alterations in the background levels of CO 2, over a range which might be encountered during host-seeking behavior.
These receptor neurons respond reliably to small increments in CO 2 concentration (e.g., 50 ppm). Sensilla basiconica on the maxillary palps of female Aedes aegypti contain a receptor neuron which produces a phasic-tonic pattern of action potential response to low concentrations (150–300 ppm) of carbon dioxide (CO 2), a stimulus known to be involved with host seeking behavior.
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