Biotoxin and Algae...Combined!

The cyanotech Corp., in conjunction with the University of
Memphis, has developed a new mosquito-control agent that combines
a toxin gene cloned from the Bacillus thuringiensis var.
israelensis (Bti) bacteria with a type of blue-green algae called
Synechococcus. This new insecticide works on the premise that the
Bti toxin is specifically lethal to mosquitoes and black flies. 
And since Synechococcus blue- green algae is the preferred food
source of mosquito larvae, the combination of these two elements
forms a great, environmentally safe way to combat mosquitoes. The
Bti bacteria has been used before to combat mosquitoes, but it
has several problems relating to cost and residual life.
Scientists hope that using the algae as part of the insecticide
will alleviate these problems and make Bti-based mosquito
treatments more a available world-wide. 

(From: Pesticide Coordinator Report Vol. 18, No. 8, CES
University of the District of Columbia)