1. Flores-Alatorre, H. L., Abrego-Reyes, V., Reyes-Esparza, J. A., Angeles, E. & Alba-Hurtado, F. Variation in the concentration of carminic acid produced by Dactylopius coccus (Hemiptera: Dactylopidae) at various maturation stages. J. Econ. Entomol. 107, 1700–1705 (2014).
2. Zimmermann, H. G. The utilisation of an invader cactus weed as part of an integrated control approach. In Proc. 7th International Symposium on Biological Control of Weeds (ed. Delfosse, E. S.) 429-432 (Instituto Sperimentale per la Patalogia Vegetale, Ministero dell’ Agricoltura e delle Foreste, Rome, Italy, 1990).
3. Eisner, T., Nowicki, S., Goetz, M. & Meinwald, J. Red cochineal dye (carminic acid): its role in nature. Science 208, 1039–1042 (1980).
4. Eisner, T. et al. Defensive use of an acquired substance (carminic acid) by predaceous insect larvae. Experientia 50, 610–615 (1994).
5. Nahuatl Community: Cultivation of cacti for the production of the red dye cochineal. Codex Osuna: Seven documents presented as evidence against the Viceroy Luis de Velasco during the 1563-1566 inquiry by Jeronimo de Valderrama. Folio 500v, p. 258. Biblioteca Nacional, Madrid (1565).