Aphids (Hemiptera: Aphididae) at the Callejón de Huaylas - Ancash, Perú.
Plant aphids were collected in different crop plants and weeds at the Callejón de Huaylas zone, Ancash, Perú. Micro slides were prepared for species determination, and 31 aphid species corresponding to 4 subfamilies and 5 tribes were identified. 123 aphid-plant relationships were established in 52 plant species from 45 genera and 19 families The following 18 aphid species are registered for the first time in the Callejón de Huaylas: Acyrtosiphon kondoi, Aphis cytisorum, A. fabae, A. helianthi, A. nerii, A. spiraecola, Brachycaudus schwartzi, Capitophorus elaeagni, Hyalopterus pruni, Metopolophium dirhodum, Myzus ornatus, Nasonovia ribisnigri, Rhopalosiphoninus latysiphon, Rhopalosiphum padi, Tuberolachnus salignus, Uroleucon ambriosae, U. sonchi y Wahlgreniella nervata and Aphis helianthi as well as Aphis cytisorum are registered for the first time in Peru. The oligophagous character of Aphis craccivora, A. gossypii, A. fabae, A. spiraecola, Brachycaudus helichrysi, Macrosiphum euphorbiae, Myzus ornatus, M. persicae, Uroleucon ambrosiae was confirmed. Brevicoryne brassicae showed and a wide host range. Aphis cytisorum was confirmed as the aphid affecting the retama plant (Spartium junceum) at the Callejón de Huaylas, together with Aphis craccivora y A. fabae as well as the specificity of A. helianthi for plant species of the Asteraceae family.