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Gopalakrishnan, S and Rao, G V R and Humayun, P and Rao, V R and Alekhya, G and Jacob, S and Deepthi, K and Sree Vidya, M and Srinivas, V and Mamatha, L and Rupela, O P (2011) Efficacy of botanical extracts and entomopathogens on control of Helicoverpa armigera and Spodoptera litura. African Journal of Biotechnology, 10 (73). pp. 16667-16673. ISSN 1684-5315