The state asks residents and nurseries to watch for the nettle caterpillar, shown here, which is about an inch long and white with black bands and has bristly spines. Call the pest hot line at 643-7378 to report sightings.

A nursery in Central O'ahu reported the presence of nettle caterpillar (Darne pallivitta) Friday to University of Hawai'i Tropical Agriculture & Human Resources officials and extension agents after workers were stung while moving plants from one site to another.

State agriculture staff found the site where the plants had been stored at the nursery to be infested on Monday and bait stations were employed, said state agriculture spokeswoman Janelle Saneishi.

No nettle caterpillars were found at the second site but bait stations were also deployed there.

Stings from the caterpillar may cause allergic reactions. Immediate treatment involves washing the affected area with soap and water, applying ice to reduce swelling, and consulting a physician to determine if further treatment is necessary.

The state is asking residents and nurseries to look out for the nettle caterpillar, which is about an inch long and white with black bands and has bristly spines, to call the pest hot line at 643-7378 to report sightings.

The caterpillar is found on the undersides of palm plant leaves, grasses and lillies.