Insect and Mite Activity Noted in Ohio Nurseries and Landscapes: 2004

Caterpillars that produce general defoliation were conspicuous by their relative absence in Ohio landscapes during the 2004 season. These included gypsy moth (Lymantria dispar); yellownecked caterpillar (Datana ministra); and walnut caterpillar (D. integerrima). However, giant silkworm moths were commonly noticed, including hickory horned devil (Citheronia regalis); polyphemus moth (Antheraea polyphemus); cecropia moth (Hyalophora cecropia); promethia moth (Callosamia promethea); and imperial moth (Eacles imperialis). High populations of grasshoppers were observed in western Ohio, but heavy infections of the fungal insect pathogen, Entomophaga grylli, were also observed.