Insecticides from different chemical groups were tested by laboratory bioassay to verify the percentage mortality of Helicoverpa armigera (Hubner 1808) (Lepidoptera: Noctuidae). The experiment was conducted in the Crop Science laboratory—Prof. CinobelinaElvas Campus—UFPI, Bom Jesus, PI, from January to June, 2013. The populations utilized came from the University’s own insect breeding laboratories. Third instar larvae of H. armigera were used to conduct the bioassay. The experimental design was fully randomized, with 13 treatments and four replications. Five larvae were used per replication, with 12 insecticides from 9 different chemical groups and a control. Each treatment consisted of three doses. The methods of application used were topical contact and ingestion in artificial diet. According to the results the percentage mortality of H. armigera larvae varied among the treatments. The results demonstrated that chlorpyrifos and spinosad were effective against third instar H. armigera larvae both on contact and by ingestion. Flubendiamide, acephate, methomyl, Bacillus thuringiensis, dimethoate, chlorantraniliprole and fipronil had good responses to control of H. armigera.
 Gabriel, D. (2013) Lagarta Helicoverpa: mais um sério problema.
 Feng, H.Q., Wu, K.M., Ni, Y.X., Cheng, D.F. and Guo, Y.Y. (2005) Return Migration of Helicoverpa armigera (Lepidoptera: Noctuidae) during Autumn in Northern China. Bulletin of Entomological Research, 95, 361-370.
 Karsten, J.P., Precetti, A.A.C.M. and Parra, J.R.P. (1978) Dados biológicos comparativos de Spodopterafrugiperda (J.E. Smith, 1797) em duas dietas artificiais e substrato natural. Rev. Agr. Piracicaba, 53, 68-78.
 Perry, T., Batterham, P. and Daborn, P.J. (2011) The Biology of Insecticidal Activity and Resistance. Insect Biochemistry and Molecular Biology, 41, 411-422. http://dx.doi.org/10.1016/j.ibmb.2011.03.003
 Ahmed, S., Zia, K. and Shah, N.U.R. (2004) Validation of Chemical Control of Gram Pod Borer, Helicoverpa armigera( Hub.) with New Insecticides. International Journal of Agriculture and Biology, 6, 978-980.
 Christie, P.T. and Wright, D.J. (1990) Activity of Abamectin against Larval Stages of Spodoptera littoralis Boisduval and Heliothis armigera (Hubner) (Lepidoptera: Noctuidae) and Possible Mechanisms Determining Differential Toxicity. Pesticide Science, 29, 29-38. http://dx.doi.org/10.1002/ps.2780290105
 Vojoudi, S., Saber, M., Hejazi, M.J. and Talaei-Hassanloui, R. (2011) Toxicity of Chlorpyrifos, Spinosad and Abamectin on Cotton Bollworm, Helicoverpa armigera and Their Sublethal Effects on Fecundity and Longevity. Bulletin of Insectology, 64, 189-193.
 Dastjerdi, H.R., Hejazi, M.J., Ganbalani, G.N. and Sabe, M. (2008) Toxicity of Some Biorational and Conventional Insecticides to Cotton Bollworm, Helicoverpa armigera (Lepidoptera: Noctuidae) and Its Ectoparasitoid, Habrobracon hebetor (Hymenoptera: Braconidae). Journal of Entomological Society of Iran, 28, 27-37.
 Colliot, F., Kukorowski, K.A., Hawkins, D.W. and Roberts, D.A. (1992) Fipronil: A New Soil and Foliar Broad Spectrum Insecticide. Brighton Crop Protection Conference Pest and Diseases, Brighton, 23-26 November 1992, 29-34.
 Liao, C., Trowell, S.C. and Akhuist, R. (2005) Purification and Characterization of Cry1Ac Toxin Binding Proteins from the Brush Border Membrane of Helicoverpa armigera Midgut. Current Microbiology, 51, 367-371.
 Wakil, W., Ghazanfar, U.M., Nasir, N., Qayyum, M.A. and Tahir, M. (2012) Insecticidal Efficacy of Azadirachta indica, Nucleopolyhedrovirus and Chlorantraniliprole Singly or Combined against Field Populations for Helicoverpa armigera Hubner (Lepidoptera: Noctuidae). Chilean Journal of Agricultural Research, 72, 3-61.