title: A study on biological control of six fresh water snails of medical and veterinary importance.
abstract: This study evaluated the molluscicidal effect of Commiphora mnolmol oil extract (Myrrh), on control of six fresh water snails (Lymnaea natalensis, Bulinus truncatus, Biomphalaria alexandrina, Physa acuta, Melania tuberculata and Cleopatra bulimoides). Also, the extract effect on the egg masses of L. natalensis, B. truncatus, B. alexandrina and Ph. acuta was evaluated. Snails and egg masses were exposed at 16-20 degrees C to various concentrations (conc.). LD50 after 24 hours expo-sure were 264/132, 283/195, 230/252, 200/224, 241/246 & 241/246 ppm for young/adult of L. natalensis, B. truncatus, B. alexandrina, Ph. acuta, M. tuberculata and C. bulimnoides respectively. LDtoo after 24 hours exposure were 400/400 for L. natalensis, B. truncatus, B. alexandrina, M. tuberculata and C. bulimoides, and 300/300 for Ph. acuta. Also, complete mortality (100%) was achieved for the egg masses of L. natalensis, B. truncatus, B. alexandrina and Ph. acuta at concentrations of 300, 200, 300 & 400 ppm respectively. Lower concentrations gave the same results after longer exposure. LD100 of C. molmol oil extract (Myrrh) had a rapid lethal effect on the six snail species and their egg masses in high conc. of 300 & 400 ppm. Commiphora molmol is a promising plant to be included with the candidate plant molluscicides. The oil extract of this plant showed a remarkable molluscicidal activity against used snail species.
authors.affiliation: Department of Parasitology, Faculty of Medicine, Benha University, Benha, Egypt.
authors.forename: Karim F
authors.initials: KF
authors.lastname: Abd-Allah
authors.forename: Mohsen M
authors.initials: MM
authors.lastname: Negm-Eldin
authors.forename: Mohamed H
authors.initials: MH
authors.lastname: Saleh
authors.forename: Azza M S
authors.initials: AM
authors.lastname: El-Hamshary
authors.forename: Bothina M R
authors.initials: BM
authors.lastname: El-Gozamy
authors.forename: Nagwa S M
authors.initials: NS
authors.lastname: Aly
mesh_terms: D000818:Animals; D029744:Commiphora / Q000737:chemistry*; D004305:Dose-Response Relationship, Drug; D006801:Humans; D008975:Molluscacides / Q000737:chemistry / Q000494:pharmacology; D010063:Ovum / Q000187:drug effects; D010572:Pest Control, Biological / Q000379:methods*; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D010938:Plant Oils / Q000737:chemistry / Q000494:pharmacology*; D012908:Snails / Q000187:drug effects*
chemical_list: D008975:Molluscacides; D010936:Plant Extracts; D010938:Plant Oils