The hostplant, Schinus molle L. (Anacardiaceae) and the last instar of Arctiinae Amastus walkeri (Rothschild, 1922) are reported for first time. Several caterpillars with abundant setae gregarious behavior, were observed feeding on leaves in department Arequipa, southwestern Peru. Ten collected raised laboratory condition. Two adults recovered. According to external morphology adults, they corr...

Background Aroeira or Brazilian peppertree, Schinus terebinthifolia Raddi (Anacardiaceae: Rhoeae), is one of the worst invasive plants in California, Florida, and Hawaii, USA because its wide distribution, adaptation to various habitats, toxicity, demonstrated negative impacts on biodiversity. Chemical mechanical methods provide only temporary control, are expensive, may damage native plants, o...