Potentiation of Burmese Pink Cassia Cassia renigera Benth Extracts against Brine Shrimp Nauplii Artemia salina (L.) and Lymnaea acuminata Lamarck

Pet. (Petroleum) ether, CHCl₃ (Chloroform) and CH₃OH (Methanol) extracts of leaves and stem-bark of Cassia renigera Benth. were evaluated against brine shrimp Artemia salina (L.) nauplii and Lymnaea acuminata Lamarck adults through cytotoxicity and molluscicidal activity tests. Except the Pet. ether extract of leaves all the rest were found effective. Against A. salina nauplii the C. renigera leaves gave LC₅₀ values 428.54, 315.20, 240.30, 180.20, 163.22 and 126.54 ppm for the CHCl₃ extract and 528.90, 358.21, 270.70, 192.56, 195.63 and 140.20 ppm for the CH₃OH extract after 18, 24, 30, 36, 42 and 48 h of exposure respectively. The stem bark gave LC₅₀ values 536.23, 339.43, 271.56, 192.56, 186.58 and 140.20 ppm for Pet. ether extract; 662.82, 368.90, 283.48, 205.04, 189.97 and 156.85 ppm for CHCl₃ and 551.60, 368.90, 334.24, 233.07, 215.52 and 140.22 ppm for CH₃OH extract, all after 18, 24, 30, 36, 42 and 48 h of exposure respectively. Against L. acuminata the C. renigera leaves gave LC₅₀ values 117.15, 103.30, 91.65, 66.74, 66.74, 52.12 and 49.35 ppm for the CHCl₃ extract, and 216.04, 177.94, 149.50, 111.61, 92.34, 59.43 and 52.20 ppm for the CH₃OH extract; the stem bark gave LC₅₀ values 105.77, 140.07, 100.62, 95.48, 86.76, 71.47 and 66.40 ppm; 129.37, 111.72, 96.67, 85.28, 77.66, 78.82 and 77.70 ppm, and 134.76, 107.35, 102.26, 94.21, 83.25, 80.70 and 77.00 ppm for Pet. ether, CHCl₃ and CH₃OH extracts after 12, 18, 24, 30, 36, 42 and 48 h of exposure respectively.