| residual activity of bacillus thuringiensis serovars medellin and jegathesan on culex pipiens and aedes aegypti larvae. | bacillus thuringiensis serovar medellin strain 163-131 and bacillus thuringiensis serovar jegathesan (b.t.jeg.) strain 367 are very toxic to mosquito larvae. however, they are 10 times less toxic than bacillus thuringiensis var. israelensis (b.t.i.) to mosquito larvae under laboratory conditions. lyophilized powders were produced from these strains and their toxicities were compared to that of powder produced from the b.t.i. strain. larvicidal activity was titrated using aedes aegypti (bora-bora ... | 1999 | 10480130 |