Publications of Vector Control Center
Prabakaran, G, V Padmanaban, and K Balaraman.
Summary

Alginate encapsulated B.thuringiensis var.israelensis (B.t.i) self floating type formulations were prepared. Its spore release rate, floating efficacy and larvicidal activity against Culex quinquefasiatus were tested in the laboratory. The larval mortality of of 91-100% was induced by the floating formulation with a mean spore release of 3.04x104 /ml/day from 6th day to 27th day. From day 28 to 33 the mean number of spores released were 1.16x104/ml/day which caused 72.2-88.2% mortality. From day 34th day to 40th day the mean number of spores released were 4.97x103/ml/day which caused 42.2-67.2% mortality. However, the self floating alginate encapsulated beads were intact and found to float upto 40 days.

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Last Updated on:06/05/2014