2016, Vol. 4, Issue 5, Part D

author(s)
Fatma Elsareh, Elham Abdalla and Rania Abdalla

abstract
Schistosomiasis is a major public health problem in Sudan. The lifecycle of the causative parasite of this disease includes intermediate snail hosts. Molluscicides of plant origin are preferred to be used for elimination of the snail vectors. Chemical molluscicides have negative impact on the environment, while plant molluscicides are ecologically friendly and not expensive. This study was designed to test molluscicide activities of aqueous leaves extract of Solenostemma argel (Del Hayne) on Biomphalaria pfeifferi egg masses and neonates. The results of egg mortality (unhatchability) in the egg masses and mortality of neonates, were statistically analyzed using probit regression analysis to calculate the lethal dose that gives 50% and 95% mortalities in 24 hours, i.e (LD₅₀ and LD₉₅). The values of the LD₅₀ and LD₉₅ of the egg masses were 2921.3 ppm, and 3515ppm, respectively, while those of the neonates were 368 ppm, and 1699 ppm, respectively.