extended molluscicidal effect of ambrosia maritima [damsissa] in the field

With the aim of studying the extended molluscicidal effect of Ambrosia maritima [damsissa] in the field, a snail survey was made on the chosen experimental canal at Abbis II village, Alexandria Governorate. A treatment with dry damsissa plant was used in conc. 75 ppm. The plant has proved to be able to control the snail vectors of bilharziasis, Biomphalaria alexandrina and Bulinus truncatus and their eggs for quite a long extended time at a very low concentration. Also it does not cause stream pollution or kill non target organisms