Autodetection and chemistry of female and male pheromone in both sexes of the tiger moth Panaxia quadripunctaria |
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| Authors: | D Schneider S Schulz E Priesner J Ziesmann W Francke |
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| Institution: | Max-Planck-Institut für Verhaltensphysiologie, D-82305, PF 1564, Seewiesen/Starnberg, Germany, Fax: +49-8157 932209 e-mail: weber@mpi-seewiesen.mpg.de, DE
Institut für Organische Chemie der Universit?t, Martin-Luther-King Platz 6, D-20146 Hamburg, Germany, DE
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| Abstract: | Female moths of Panaxia quadripunctaria PODA (Lepidoptera, Arctiidae), produce (Z,Z)-6,9-heneicosadiene (I) as the major and (Z,Z)-6,9-eicosadiene (II) as the minor component of a putative pheromone. Related compounds occur in trace amounts. The abdominal
scent glands contain 5–10 μg of (I) and 50–100 ng of (II). Recordings of electroantennogram (EAG) responses to (I), (II),
and to female glands are of equal amplitude in both sexes. Females are thus capable of pheromone autodetection in contrast
to the majority of moths where females are considered to be anosmic for their own attractant. The EAG threshold to (I) was
below 1 ng at the odour source. The odour of the male scent gland (corema) elicited significant EAGs in both sexes. The chemical
contents of coremata varied with the provenience of the moths. A variety of ethyl esters was always found, yet hydroxydanaidal
(up to 20 μg/corema) and traces of danaidal, only in some samples. All these scents might be components of a male pheromone.
Peculiar scent scales on the coremata are exposed during the extrusion. Antennae of both sexes have similar inventories of
trichoid sensilla.
Accepted: 11 July 1997 |
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| Keywords: | Arctiidae Pheromones Autodetection Hydroxydanaidal Danaidal |
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