Efecto de la colofonia sobre la actividad cardiaca y eclosión de los huevos de Biomphalaria havanensis

introduction: in cuba, recent studies with colophony - a resin from pinus caribaea and p. tropicalis - have shown its molluscicidal activity on biomphalaria havanensis, intermediate host of schistosomosis. objective: to determine the impact of colophony on the heart activity and the hatching of b. havanensis eggs in lab. methods: lethal doses of colophony (ld50 y ld90) were used to determine their effect on heart activity and their ovicidal capacity on b. havanensis eggs. heartbeats were counted using stethoscope. the ovicidal effect was observed in one day and 5-day laid eggs. results: as a result, this product had an impact on the embrionary development of one-day and five-day eggs; the latter were the least affected. in addition, a marked reduction in the number of heartbeats per minute was observed. conclusion: colophony may be considered as possible option for control of b. havanensis because of their molluscicidal properties.