Abstract :Water-borne diseases like schistosomiasis or fasciolosis with gastropods as intermediate hosts are still a burden for mankind especially in tropical countries. No continent is free from this disease. Besides using chemotherapeutic agents for treating man and infected animals as definite host, the “World Health Organization” recommends fighting against the intermediate hosts as a necessary and unpronounceable. Due to more attention on SARC, AIDS, malaria and research in immunological approaches to worm control, a little interest is focused on snail control to minimize the fasciolosis. With respect to this approach, mollusciciding is still in the centre of efforts.