author(s)
Alimul Islam, Nazia Sharmin, Monoar Hosen, Tandid Kamal, Zaidur Rahman Sabuj and Nurul Islam

abstract
Petroleum ether (Pet. ether), chloroform (CHCl₃) and methanol (CH₃OH) extracts of Epipremnum aureum (Linden & Andre) G. S. Bunting have been subjected to dose-mortality and repellent activity tests against the adult beetles of Tribolium castaneum (Hbst.), Sitophilus oryzae (L.) and Callosobruchus chinensis (L.). The Pet. ether extract of E. aureum gave the LD₅₀ values 1.40, 1.21, 1.16, 1.10, 1.04, 0.96 and 0.84mg/cm² against T. castaneum; 1.73, 1.66, 1.32, 1.08, 1.00, 0.99 and 0.90mg/cm² against S. oryzae; 2.95, 2.02, 2.01, 1.91, 1.82, 1.72 and 1.65mg/cm² against C. chinensis after 6, 12, 18, 24, 30, 36 and 42h of exposures respectively. CHCl₃ and CH₃OH extracts did not show any mortality against all three test agents. In repellency tests, Pet. ether extract of E. aureum showed significant repellent activity against T. castaneum and C. chinensis at 5% level of significance (P<0.05); CHCl­₃ extract showed significant repellent activity against T. castaneum and C. chinensis at 1% level of significance (P<0.01) and at 5% level of significance (P<0.05) respectively. However, the CH₃OH extract of E. aureum did not show repellent activity against T. castaneum, S. oryzae and C. chinensis.