1. Abul-Nasr S, Elnagar S (1980) The susceptibility of the cotton leafworm, Spodoptera littoralis (Boisd) to different isolates of nuclear polyhedrosis virus. J Appl Entomol 90:289–292
2. Aizawa K (1963) The nature of infections caused by nuclear polyhedrosis viruses. In: Steinhaus EA (ed) Insect pathology: an advanced treatise, vol 1. Academic, New York, pp 381–412
3. Anderson RF, Shieh TR, Huang HT, Rogoff MH (1972) Production of a viral pesticide. Proc Symp Fermentat Technol Today 2:493–505
4. Angelini A, Labonne V (1970) A technique for the rearing of Heliothis armigera (Hub.) and a possibility of producing a nuclear virus disease in the Ivory Coast. Cotton Fibres Tropicales 25:501–504
5. Anon (2009) Biopesticides market to reach $ 1 billion in 2010. http://www.ien.com/article/biopesticides-market-to/8648