Author/Authors :
Angaye، Tariwari C.N. نويسنده Ecotoxicology and Environmental Safety Research Unit, Department of Biological Sciences, Niger Delta University, Bayelsa State, Nigeria. , , Bassey، Sunday E. نويسنده Ecotoxicology and Environmental Safety Research Unit, Department of Biological Sciences, Niger Delta University, Bayelsa State, Nigeria. , , Ohimain، Elijah I. نويسنده Ecotoxicology and Environmental Safety Research Unit, Department of Biological Sciences, Niger Delta University, Bayelsa State, Nigeria. , , Izah، Sylvester Chibueze نويسنده Department of Biological Sciences, Faculty of Science, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria. 2 , , Asaigbe، Philip I. نويسنده Department of Genetics and Biotechnology, University of Calabar, Cross-River State, Nigeria ,
Abstract :
Plant-derived pesticide have found several remedial application in the control of most diseases (especially vector-borne diseases). Synthetic pesticides are unaffordable in most disease endemic areas; besides they may induce varying toxicity to nontargeted species as they bio-magnify along the food-chain. The fecundity of vector/parasites in the Niger Delta is becoming hyper-endemic due to the water-logged nature of the terrain. The molluscicidal activities of crude and methanolic extracts of the leaves of four Niger Delta Mangrove plants (Rhizophora mangle, R. racemosa, Avicennia germinans and Languncularia racemosa), were investigated against some vectors of schistosomiasis (Biomphalaria pfeifferi, Bulinus glo bosus and Bulinus rholfsi), following standard protocol. Compared to the individual activities demonstrated by the four plants, the highest mor tality was recorded in the methanolic-synergicidal formula (1:1:1:1), of the four plants against B. pfeifferi (LC50=74.84ppm), B. globosus (LC50=65.10ppm) and B. rholfsi (LC50=28.00ppm). Also, within the synergicidal results, B. pfeifferi was less susceptible to all extracts compared to B. globosus and B. rholfsi. These results indicate that Niger Delta Mangrove plants show great potential as molluscicide for the control of schistosomiasis.
