Mala, M, M M U Islam, and K S Islam. 2012. “Residual Effect of Two Insecticides and Neem Oil Against Epilachna Beetle, Epilachna Vigintioctopunctata (Fab.) on Bitter Gourd”. Journal of the Bangladesh Agricultural University 10 (1):21-25. https://doi.org/10.3329/jbau.v10i1.12034.