F. O. Alao, T. A. Adebayo, and O. A. Olaniran, “On - Farm Evaluation of Natural Toxicants from Tephrosia Vogelii and Petiveria Alliacea on Megalurothrips Sjostedti and Apion Varium of Cowpea (Vigna Unguiculata (L) Walp)”, Bangladesh J. Agric. Res, vol. 36, no. 4, pp. 575–582, Sep. 2012.