On Tue, 12 Jun 2007 07:38:33 CST, "Doug Brown"
wrote:

The municipality where I live has a long, successful record of controlling
mosquito larvae by using a targeted biological pesticide, Bacillus
thuringiensis serovar israelensis

This has no effect on other insects and is environmentally friendly.

Even more environmentally friendly than Gambusia which not only feast on
mosquito larvae but eat frog spawn. It is sold here as a product called
Mosquito Dunks. ~ jan

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Zone 7a, SE Washington State
Ponds: www.jjspond.us