While gypsy moth is still in its egg stage, hatching of the caterpillars will be here before we know it. Caterpillars begin to hatch at 192 GDD, or about the same time first bloom of redbud (Cercis canadensis) is observed. Gypsy moth egg masses can be found almost everywhere from the branches and trunks of trees to on sign posts, houses, wheel wells of trailers, garden art, inside of dog houses and bird houses, and on fences. They can be about the size of a quarter or larger, but are often more oval than round.
To date, 51 of Ohio's 88 counties have established gypsy moth populations. The Ohio Department of Agriculture (ODA) operates three programs aimed at managing the gypsy moth in Ohio. The three programs mirror the three zones defined in a spreading infestation. The Suppression Program (infested zone) is in areas where the gypsy moth is well established and treatments are performed at the voluntary request of the landowners. The Slow-the-Spread Program (transition zone) focuses on monitoring, detecting, and reducing isolated populations to slow the gypsy moth's movement across the state. The Eradication Program (uninfested zone) focuses on monitoring and detecting any populations that may have jumped out ahead of the transition zone. Treatments are so designed to "eradicate" the isolated populations.
Four products recommended by the USDA Forest Service will be used in the 2014 treatment of Ohio and include: Gypchek, Foray 48b, Dimlin 4L, and Disrupt II.
Interactive maps, treatment block maps, and information about this non-native pest can be found on the ODA website at http://www.agri.ohio.gov/divs/plant/gypsy/gypsy-index .