Patchareewan Chongchitmate, Vacharee Somsook, Praparat Hormchan and Niphon Visarathanonth (2005) “Bionomics of Entomopathogenic Nematode Steinernema siamkayai Stock, Somsook and Reid (n. sp.) and Its Efficacy Against Helicoverpa armigera Hübner (Lepidoptera: Noctuidae)”, Agriculture and Natural Resources. Bangkok, Thailand, 39(3), pp. 431–439. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/243343 (accessed: 12 October 2026).