Issue 14, August 13, 2010
Celery leaftier moths are very numerous in central and northern Illinois. These moths are brownish and about one-quarter inch long. Their wings form a triangular shape when they are at rest. An excellent article written by fellow Extension Entomologist, Mike Gray, on this moth is in the Bulletin, a newsletter produced by University of Illinois Extension covering field crops.
Sod webworm moths are also very common in turfgrass. They are larger, being about one-half inch long. They are light tan and sit with their wings tight against the body on grass blades. We have not had any reports of sod webworm damage to turf in Illinois, but be vigilant of non-irrigated turf that has received little rainfall. These insects were addressed in this newsletter about two weeks ago.--Phil Nixon