Impact of Taraxerol in combination with extract of Euphorbia tirucalli plant on biological parameters of Lymnaea acuminata

Abstract

SUMMARYThe present work was carried out to evaluate the molluscicidal activity of active ingredient Taraxerol with the acetone extract of Euphorbia tirucalli against Lymnaea acuminata snail. The (fecundity, hatchability and survivability) of snail L. acuminata exposed to this extract was studied. The effects of the tested extracts on life-history traits of harmful snail L. acuminata have also been evaluated, and this study also expounds the inhibitory effects of these extracts singly as well as in binary combination (1:1 ratio). It concluded that these herbal products act as a potential source of molluscicides, and that they would also have the advantage of easy availability, low cost, biodegradability and greater acceptance amongst users than synthetic pesticide.

Development and Evaluation of Poly Herbal Molluscicidal Extracts for Control of Apple Snail (Pomacea maculata)

“…An analysis of the molluscicidal activities of the six plant extracts on P. maculata showed that there was a linear relationship between the concentrations of the individual extracts and the mortality of snails (Figure 1). This observation was in agreement with the findings of Chauhan and Singh [36] and EI-Din et al [37] wherein increases in the concentration of plant extracts resulted in high mortality rates of various pest snails. A similar positive correlation between the concentration of plant extracts (Sandoricum vidalii, Harpulia arborea, and Parkia sp.)…”

“…In the present study, the LC50 The result of the probit analysis on the mortality data of individual plant extracts on snails at LC50 and LC90 and fiducial limits are summarized in Table 4. Chi-square tests for probit analysis of This observation was in agreement with the findings of Chauhan and Singh [36] and EI-Din et al [37] wherein increases in the concentration of plant extracts resulted in high mortality rates of various pest snails. A similar positive correlation between the concentration of plant extracts (Sandoricum vidalii, Harpulia arborea, and Parkia sp.)…”

“…This resulted in significant reductions in the LC 90 values on the mortality of P. maculata in comparison to the individual extracts. Similarly, Chauhan and Singh [36] reported that the binary combination (1:1 ratio) of taraxerol from Codiaeum variegatum and acetone extract of Euphorbia tirucalli on L. acuminata increased thetoxicity by 9.51 times relative to the individual treatments. Furthermore, the binary combination of latex powder of Euphorbia pulcherima and Jatropha gossypifolia significantly reduced the fecundity, hatchability, and survival of young snails of L. acuminata [41].…”

“…In the present study, the LC 50 and LC 90 of N. indicum, P. nigrum, N. tabacum, and A. indica extracts were 179. 36 The results indicate that the snails were more sensitive to N. indicum, P. nigrum, and N. tabacum extracts, as evidenced by their lower LC 50 and LC 90 values indicating the highest potency. Eventually, the crude ethanol extract of N. indicum was found to be the most effective, with a LC 90 value (341.57 mg/L, 48 h), whereas Dai et al [39] recorded the lowest LC 50 value (3.71 mg/L, 96 h) with purified cardiac glycosides of N. indicum for the control of P. canaliculata.…”

“…This resulted in significant reductions in the LC90 values on the mortality of P. maculata in comparison to the individual extracts. Similarly, Chauhan and Singh [36] reported that the binary combination (1:1 ratio) of taraxerol from Codiaeum variegatum and acetone extract of Euphorbia tirucalli on L. acuminata increased thetoxicity by 9.51 When two plant extracts were combined at a ratio of 1:1 (w/w), the individual plant extract's concentration would reduce to 50%. Therefore, it is expected that in the diluted form their combination would be needed in a high concentration for achieving 90% mortality of the snails.…”