Gypsy moth treatments to begin in southern Ohio


REYNOLDSBURG, Ohio — The Ohio Department of Agriculture announced aerial treatments designed to slow the spread and suppress the gypsy moth are scheduled to begin in Jackson and Vinton counties.

Treatment blocks include 54 acres in Jackson County and more than 1,202 acres in Vinton County.

Treatments are administered using a low-flying aircraft that flies just above tree tops.

They will begin during the first two weeks of May, which coincides with the insect’s first and second caterpillar stages.

Ohioans are most likely to notice these treatments occur during early morning hours when weather conditions are ideal.

Crucial elements

In order for successful application, the following elements are crucial: high humidity, low temperature and low wind.

In both counties, the department will be using Foray (Btk), which is a naturally occurring bacterium found in the soil that interferes with the caterpillars’ feeding cycles.

These treatments are not toxic to humans, pets, birds or fish.

Citizens can locate maps of treatment blocks by visiting and clicking on “Gypsy Moth Program” located under the “Featured Programs” section.

Ohioans can receive daily updates regarding treatment progression throughout the state by calling 614-387-0907 any time after 5 p.m.

Invasive insects

Gypsy moths are invasive insects that attack trees and shrubs by defoliation. In its caterpillar stage, the moth feeds on the leaves of 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.

In Ohio, 49 counties are currently under gypsy moth quarantine regulations.

Three programs

The department uses three programs targeted to manage the gypsy moth’s presence in Ohio.

The “suppression” program is used in counties where the pest is already established (infested zone), but landowners voluntarily request treatment to help suppress populations.

The second program, “slow-the-spread,” occurs in counties in front of the larger, advancing gypsy moth population (transition zone).

And the third program, “eradication,” is used in counties where isolated populations develop ahead of the transition zone due to human movement of the gypsy moth (uninfested zone).

Officials work to detect and control isolated populations in an effort to slow the overall advancing gypsy moth infestation. In total, 21 Ohio counties will receive treatment.

More information

For more information about gypsy moth, its quarantine or specific treatment locations visit

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