Gypsy Moth Mating Disruption Treatments to Begin in Ohio

Delaware, Franklin, Hardin, Hocking, Knox, Licking, Marion, Morrow, Muskingum, Perry, Union, Vinton and Washington counties to receive treatments

REYNOLDSBURG, Ohio (June 18, 2020) – The Ohio Department of Agriculture (ODA) will begin aerial treatments designed to disrupt gypsy moth mating on 64,049 acres across the state. Portions of Columbus, Delaware, Dublin, Gahanna, Granville, Marion, Minerva Park, Newark, Upper Arlington, and Westerville will be treated. Parts of Delaware, Franklin, Hardin, Hocking, Knox, Licking, Marion, Morrow, Muskingum, Perry, Union, Vinton, and Washington counties will also receive treatments.

To help protect Ohio’s diverse habitat, ODA operates multiple programs aimed at managing the gypsy moth in the state. One such program, the Slow-the-Spread program, focuses on monitoring, detecting, and reducing isolated populations to slow the gypsy moth’s movement through treatments.

Airplanes will fly approximately 100 feet above the treetops and buildings to apply the treatment throughout the day. Weather permitting, treatments will begin in southern and central Ohio in the coming days.

In all counties receiving treatment, ODA will use a single application of the product SPLAT GM-O. This product does not kill the moth, but it disrupts the mating process by confusing the male as it searches for a female mate. SPLAT GM-O is an organic product and is not harmful to birds, bees, plants, pets or humans.

Pre-recorded daily updates about planned treatment blocks are available by calling 614-387-0907 or 614-728-6400.

The gypsy moth is a non-native, invasive species that feeds on the leaves of more than 300 different trees and shrubs and is especially fond of oak. A healthy tree can usually withstand only two years of defoliation before it is permanently damaged or dies. To date, 51 of Ohio’s 88 counties have established gypsy moth populations.

For more information on the gypsy moth, including maps of treatment areas and videos of the mating disruption process, please visit