Cemetery used in science experiment to combat mosquitoes

Scientists in Peru tested the toxicity of a mosquito-larvae-killing substance by setting up locations in nooks and crannies of a cemetery. They put the deadly substance into small spots of moisture, and, reports the New York Times:

The researchers found that putting stations in as little as 3 percent of
the available spots in the cemetery resulted in coverage of almost all the
breeding habitats in the immediate area, and mortality of up to 98 percent of
the mosquito larvae.