Malarvannan S., Giridharan R., Sekar S., Prabavathy V.R., Nair S..  2009.  Ovicidal activity of crude extracts of few traditional plants against Helicoverpa armigera (Hubner) (Noctuidae: Lepidoptera). Journal of Biopesticides. 2(1):71.

Malarvannan S., S. Kumar S, Giridharan R., Nair S.  2008.  Bioefficacy of Argemone mexicana against American Bollworm, Helicoverpa armigera (Hubner) (Noctuidae: Lepidoptera). Hexapoda. 15(1):55.