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Science 30 May 1980:
Vol. 208. no. 4447, pp. 1039 - 1042
DOI: 10.1126/science.208.4447.1039
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Articles

Red Cochineal Dye (Carminic Acid): Its Role in Nature

THOMAS EISNER 1, STEPHEN NOWICKI 1, MICHAEL GOETZ 2, and JERROLD MEINWALD 2

1 Section of Neurobiology and Behavior, Cornell University, Ithaca, New York 14853
2 Department of Chemistry, Cornell University

Carminic acid, the well-known red dyestuff from cochineal insects (Dactylopius spp.), is a potent feeding deterrent to ants. This deterrency may be indicative of the natural function of the compound, which may have evolved in cochineals as a chemical weapon against predation. The behavior of an unusual predator is described—the carnivorous caterpillar of a pyralid moth (Laetilia coccidivora)—which is undeterred by carminic acid and feeds on cochineals. The animal has the remarkable habit of utilizing the ingested carminic acid for defensive purposes of its own.

Submitted on December 11, 1979
Revised on February 15, 1980

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Science. ISSN 0036-8075 (print), 1095-9203 (online)