Unpalatability of the pyrrolizidine alkaloid-containing moth Utetheisa ornatrix, and its larva, to wolf spiders. Behavioral Ecology and Sociobiology 9 227-235. Precopulatory sexual interactions in an arctiid moth (Utetheisa ornatrix) role of pheromone derived from alkaloids. Journal of Chemical Ecology 17 2063-2075. Chemical basis of egg cannibalism in a caterpillar (Utetheisa ornatrix). Utetheisa ornatrix (L.) Crotalaria Larva Hodal Genital Eisner, 1980 Conner et al. The most thoroughly documented larval PA feeder is Utetheisa ornatrix (Plate 7.1. Our studies were done mostly with populations of the moth from central Florida. The species has a broad range, extending through North America east of the Rockies and southward into Brazil, Argentina, and Chile. The moth uses the compounds for defense and for production of a pheromone that plays a decisive role in sexual selection. We here summarize work we have done with a moth, Utetheisa ornatrix, that has a dependence on certain plant alkaloids. Arctiidae 1,Z3,Z6,Z9-21 H Arctia villica Pareuchaetes pseudoinsulata Utetheisa ornatrix 84 93 82.
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