Nuananong Piyapan and Tipvadee Attathom (1992) “ Comparative Studies on the Use of Nuclear Polyhedrosis Virus and Alphacypermethrin for Controlling Cotton Bollworm, Helicoverpa armigera (Hubner) (Lepidoptera : Noctuidae) on Tomato”, Agriculture and Natural Resources. Bangkok, Thailand, 26(2), pp. 131–140. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/241766 (accessed: 17 September 2026).