The state chemist's office has approved a new insecticide for use against the tree-killing emerald ash borer.
The insecticide is called Tree-age. It's essentially a poison that kills the insect when its grub-like larvae feed on trees that have been treated with the chemical.
Purdue University entomologist Cliff Sadof says the insecticide is "very promising" based on tests conducted in Michigan. Purdue scientists are now conducting field tests in Indiana to gauge its effectiveness.
In the Michigan tests, the insecticide killed more than 99 percent of ash borer larvae in treated trees and 100 percent of the metallic-green adult beetles that ate the tree's leaves. Tree-age is expected to be available in Indiana by early May.