Pratissoli, Dirceu, and Harley Nonato de Oliveira. 1999. “Influence of Egg Age of <i>Helicoverpa zea< i> (Boddie) on the Parasitism by <i>Trichogramma Pretiosum Riley< I>”;. Pesquisa Agropecuaria Brasileira 34 (5):891-96. https://doi.org/10.1590/S1678-3921.pab1999.v34.5271.