The city itself was sprayed with malathion, in order to control mosquitoes and other similar pests.
He also questioned the toxicity of the insecticide used to control adult mosquitoes.
Company officials said each machine could control mosquitoes in an area of one acre.
Many simple things have been done to control mosquitoes.
However, fenthion has been extensively used in Florida to control adult mosquitoes.
The surest way for the average person to control mosquitoes is to drain standing water from areas around the home where they breed, he said.
I was involved in an attempt to control mosquitoes by genetic techniques some 12 years ago.
He added that the city had decided to control mosquitoes at the reservoir with a natural predator.
Given its ability to control mosquitoes, scientists have wondered whether the plasmodium may also be able to manipulate humans.
As a result, he said, the most significant action a homeowner can take to control mosquitoes is to eliminate standing water.