Monroy, Catherine L. and Macawile, Janet P. (1998) Insecticidal property of chloroform extracts of Tagetes erecta (marigold), Tothonia diversifolia (wild sunflower), Capsicum frutescens (chili pepper) and Azadirachta indica (neem seed) against corn weevil. Undergraduate thesis, De La Salle University-Dasmarinas.