Author(s):

Sahadat Hossain, Sadia Afrin Rimi, Hasan Ali, Rifat Ara Shawon, Mohammad Abdullah and Nurul Islam

Abstract: Petroleum ether, CHCl₃ and CH₃OH extracts of the aerial parts of Abutilon hirtum (Lam.) Sweet were subjected to dose-mortality tests against adult beetles of Tribolium castaneum (Hbst.) and Lymnaea acuminata Lamarck under laboratory conditions. The Pet. ether extract offered mortality to T. castaneum and gave LD₅₀ values 99.956, 89.910, 80.447 and 74.839 mg cm^-2 after 12, 18, 24 and 30h of exposure respectively, and the CH₃OH extract gave LD₅₀ values 218.427, 215.647, 209.361, 205.431, 201.792 and 199.855 mg cm^-2 after 6, 12, 18, 24, 30 and 36h of exposure respectively. While the CHCl₃ extract didn’t offer mortality against T. castaneum. In case of L. acuminata, the CHCl₃ and CH₃OH extracts offered LC₅₀ values 121.130, 112.784 and 110.369 ppm; and 66.323, 58.892 and 51.983 ppm both after 12, 18 and 24h of exposure respectively. The Pet. ether extract did not show mortality to L. acuminata up to 120 ppm.

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