Crews are treating ash trees in Indianapolis' city parks to combat the spread of the tree-killing emerald ash borer.
The city's Department of Public Works said this is the third year of a five-year program called the Legacy Tree Project designed to raise public awareness about the invasive bug.
About 200 ash trees in three city parks are being treated with an insecticide proven to protect ash trees from the destructive insect.
Indianapolis is one of 13 cities taking part in the program, which is funded by Valent Professional Products.
The small, metallic-green beetle that's native to Asia has decimated ash trees in several states since 2002. The emerald ash borer has already destroyed trees in 51 Indiana counties.