Aportes al conocimiento de los parasitoides de larvas de Noctuidae (Lepidoptera) en el cultivo de soja, en Tucumán, Argentina

Abstract

Se identificó el complejo de parasitoides (Hymenoptera y Diptera) de larvas de las principales especies defoliadoras en cultivos de soja en Tucumán, Argentina: Anticarsia gemmatalis Hübner, Rachiplusia nu (Guenée), Pseudoplusia includens (Walter), y Spodoptera eridania (Stoll) (Lepidoptera: Noctuidae). Se recolectaron larvas de estas especies durante las campañas agrícolas 2005/06 y 2006/07. Se identificaron nueve especies de Hymenoptera: Copidosoma floridanum (Ashmead) (Encyrtidae), Brachymeria ovata (Say) (Chalcididae), Euplectrus sp. (Eulophidae), Cotesia marginiventris (Cresson), Snellenius sp. (Braconidae), Microcharops sp., Colpotrochia sp., Eiphosoma dentador (Fabricius), y Patroclus sp. (Ichneumonidae). Asimismo, fueron encontradas cinco especies de Diptera: Voria ruralis (Fallén), Winthemia sp., Chetogena haywardi (Blanchard), Chetogena sp. (Tachinidae), y Megaselia scalaris (Loew) (Phoridae). Se mencionan como nuevos hospederos de Eiphosoma dentator, Snellenius sp., y Patroclus sp., a S. eridania, R. nu, y P. includens, respectivamente. Una especie de Colpotrochia es citada por primera vez en Argentina como parasitoide de S. eridania.

A parasitoid complex (Hymenoptera and Diptera) was identified based on larvae of the main defoliating species of soybean crops in Tucumán, Argentina: Anticarsia gemmatalis Hübner, Rachiplusia nu (Guenée), Pseudoplusia includens (Walter) and Spodoptera eridania (Stoll) (Lepidoptera: Noctuidae). Larvae of these species were collected during two agricultural seasons, 2005/06 and 2006/07. Nine species of Hymenoptera were identified: Copidosoma floridanum (Ashmead) (Encyrtidae), Bra- chymeria ovata (Say) (Chalcididae), Euplectrus sp. (Eulophidae), Cotesia marginiventris (Cresson), Snellenius sp. (Braconidae), Microcharops sp., Colpotrochia sp., Eiphosoma dentator (Fabricius), and Patroclus sp. (Ichneumonidae). Five species of Diptera were also recorded: Voria ruralis (Fall), Winthemia sp., Chetogena haywardi (Blanchard), Chetogena sp. (Tachinidae) and Megaselia scalaris (Loew) (Phoridae). Spodoptera eridania, R. nu and P. includens are reported as new hosts of Eiphosoma dentator, Snellenius sp. and Patroclus sp., respectively. A species of Colpotrochia is cited for the first time in Argentina as parasitoid of S. eridania