Actividad molusquicida del Piquerol A aislado de Piqueria trinervia (compositae) sobre ocho especies de caracoles pulmonados

摘要: In laboratory trials an aqueous solution of Piquerol A from Piqueria trinervia, collected in several regions Mexico, showed a molluscicide action on the adults eight different pulmonates snails species. Fossaria (Fossaria) humilis, F. (Bakerilymnaea) sp., Pseudosuccinea columella and Stagnicola attenuata Mexico; (B.) cubensis Physa Cuba; P. Biomphalaria glabrata Brazil; B. Puerto Rico; S. elodes USA. The was tested at 50, 25 5 ppm concentration, for two periods 6 24 hours, room temperature (20-22oC). 100% mortality obtained all species 50 concentration after hours exposure; same percentage hours; 60 to during exposure. No recovery observed among any treated snails. is sesquiterpene with low stability nature has previously only been as insecticide inhibitor metabolism cell cultures; no field trails have made its toxicity other aquatic fauna yet, but it believed could be excellent use areas where focal transmission schistosomiasis fascioliasis are taking place. This first time experiments molluscicides carried out Mexico.