Stavridis, D.G., Ipsilandis, C.G., Katarachias, P.C., Milonas, P.G., Ifoulis, A.A. and Savopoulou-Soultani, M. 2004. Determination of Helicoverpa armigera (Lepidoptera: Noctuidae) larval instars and age based on head capsule width and larval weight. ENTOMOLOGIA HELLENICA. 15, (Jan. 2004), 53–61. DOI:https://doi.org/10.12681/eh.14047.