Molluscicidal activity of <i style="">Piper cubeba </i>Linn., <i style="">Piper longum </i>Linn. and <i style="">Tribulus terrestris </i>Linn. and their combinations against snail <i>Indoplanorbis exustus </i>Desh.

Abstract

<smarttagtype namespaceuri="urn:schemas:contacts" name="Sn"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place" downloadurl="http://www.5iantlavalamp.com/"> The toxic effect of dried berries powder of <i style="">P. cubeba</i>, dried fruit powder of <i style="">P.</i> <i style="">longum</i> and <i style="">T. terrestris</i> singly as well as in combination [binary(1:1) and tertiary (1:1:1)] were studied against snail <i style="">I. exustus</i>.<b style=""> </b>Toxicity of these plant products were time and concentration dependent. Ethanol extracts of these plants were more effective than that of other organic solvents. 96 h LC₅₀ value of column purified fraction of <i style="">T. terrestris</i> against <i style="">I.</i><i style=""> exustus</i> was 9.57 mg/l, where as 96 h LC₅₀values of column purified fractions of <i style="">P. longum</i> and <i style="">P. cubeba</i> were 11.57 mg/l and 10.93 mg/l, respectively. Binary (1:1) combination of <i style="">P. cubeba</i> (PC) + <i style="">P. longum</i> (PL) (41.78 mg/l) was more effective than<i style=""> P. cubeba</i> (PC) + <i style="">T. terrestris</i> (TT) (42.17 mg/l) and<i style=""> P. longum</i> (PL) +<i style=""> T. terrestris</i> (TT) (55.84 mg/l) respectively; while tertiary (1:1:1) combinations of <i style="">P. cubeba</i> (PC) +<i style=""> T. terrestris</i> (TT) + <i style="">T. foenum</i>-<i style="">graecum</i> (TF) (10.67 mg/l) was more effective than rest of the combinations. These plants can be used as potent source of molluscicides against the snail <i style="">I.</i><i style=""> exustus</i>. <b style=""></b> </smarttagtype></smarttagtype>