Sergio M. Ovruski (Centro de Investigaciones para la Regulacion de Poblaciones de Organismos Nocivos; C.C. 90-4000 San Miguel de Tucumán, ARGENTINA).

Current projects: "I am working on my Doctoral Thesis on the biology, taxonomy and economic importance of parasitoid Hymenoptera attacking fruit flies in Argentina. I am especially concentrating on the biology of Doryctobracon brasiliensis and D. tucumanus. In January 1993, I spent one week in the Department of Entomology of "Escola Superior de Agricultura" "Luiz de Queiroz" da Universidade de São Paulo, Brazil" studying braconid parasitoids of fruit flies in Brazil.

Requests for help or cooperation: I need literature on the biology of Doryctobracon, Opius and other genera.

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