Hello All,
Interesting thread.
A patent has been applied for a ultrasound instrument which kills mosquito
larva. Hope is it will replace pesticides and help in control of West Nile
Virus. . A young student named Michael discovered the ultrasound killed the
misquito larva while working on his science project for school. Michael and
his Dad were  interviewed on "The Early Show" today May 23,2001. I believe I
have got the details correct but was fixing breakfast and not devoting my
full attention to the show. Hopefully others which watched the program might
comment.
Bob