The gypsy moth caterpillars the target of the aerial chemical attack carried out by a specially equipped spray helicopter early Thursday morning - were not the only residents of the 4,500-home area made unhappy by the spraying.

Several Mount Olympus Cove residents who were outside at 6:15 a.m. said the helicopter's white spray upset them.Kim Woodward, who was jogging with her dog when the helicopter flew over her, told the Deseret News she was upset because she didn't know the spraying was going to be Thursday morning.

"I would not have been outside if I had known," she said. "I'm six months pregnant, and I don't want any harm to come to my baby."

Richard P. Kline, public affairs specialist with the U.S. Forest Service, who stopped his truck to speak to Woodward, told her there was no danger and the spray only affects moth and butterfly caterpillars and then not all of them.

Several area residents who stayed inside during the spraying said they were startled by the sound of the helicopters. There were three flying over the area: the spray vehicle, an observation helicopter and a television station's helicopter.

About 300 of an eventual 900 gallons of the insecticide Bacillus Thuringiensis or B.t. was sprayed Thursday morning on 1,190 acres east of I-215 between 50th South and 29th South and up Mill Creek Canyon to Tracy Wigwam Boy Scout Camp.

Utah Department of Agriculture and U.S. Forest Service officials who observed the spraying said the weather couldn't have been much better. There was little or no wind and visibility was good.