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SCR with summer morph of the lettuce aphid, N. ribis-nigri. (a) Response of an olfactory cell in the proximal primary rhinarium (fifth antennal segment) to (Z)-jasmone (1 μg). Stimulus applied over 2 sec; beginning and end of stimulus period are marked as X and Y, respectively. (b) Dose–response of a single olfactory cell to (Z)-jasmone and methyl jasmonate. Each point is the mean of two stimulations on the same preparation.
