Evaluation of indigenous molluscicides in water against schistosomiasis vectors

Abstract

Seven varieties of indigenous Phytolacca dodecandra L'Herrit (Phytolaccaceae) were field-tried for molluscicidal potency, varieties (U96) and (U95) collected from Kabarole and Kabale respectively were the most potent with LD90 equal to 2.54 and 6.46mg.l respectively. Water bodies rangimg between 4,770 and 347,510 litres in Kibimba rice fields were treated with up to 50mg.l. sanils kills were monitored every three months and 92 - 100% mortality rates were realized. HPLC fingerprints revealed the two P. dodecandra varieties to contain highest concetration if the active principle, oleanoglycotoxin- A or lemmatoxin - A.