Small infestation of little fire ants at Maui hotel

Published On: Jun 18 2014 02:35:01 PM HST

Hawaii Ant Lab


A small infestation of the invasive little fire ant was confirmed in late May and has been undergoing treatment at a hotel in Wailea on Maui, according to the Hawaii Department of Agriculture.

The Maui Invasive Species Committee (MISC) detected the infestation, which was confirmed by the state agriculture department.

Upon confirmation of the little fire ant infestation, crews from MISC, the Hawaii Ant Lab and the agriculture department immediately conducted a concentrated survey and determined that the infestation covered an area of about 400 square feet.

The area was immediately treated with the pesticide Siesta and the hotel will do follow-up treatments every six weeks under the direction of the Hawaii Ant Lab.

MISC and the Oahu Invasive Species Committee are continuing to survey areas for little fire ants.

"The area of infestation was caught early and crews are extremely confident that it can be eradicated," said Scott Enright, chairman for the Hawaii Board of Agriculture. "We cannot express enough how important it is to find any infestation before it becomes widely established."

To aid in the effort, the Department of Land and Natural Resources has produced a three-minute video, "How to Test for LFA," which shows the step-by-step procedure for testing for LFA.  Click here to watch the video.

"LFA is a serious threat to plants, people, and property across Hawaii," said William Aila, Jr., chairperson of the Board of Land and Natural Resources. "This tiny ant can inflict painful stings to children, pets and adults, but fortunately, testing for its presence is easily done.  The state has a well-established system in place for people to submit their surveys for further testing to determine whether LFA has spread to a particular property or plant material."

The video was produced by DLNR in cooperation with the agriculture department and other agencies that are jointly addressing the little fire ant issue.  It features invasive species biologist Domingo Cravalho, Jr. of the U.S. Fish and Wildlife Service, one of the participating agencies.

Little fire ants have been found on Hawaii Island since 1999.  In late December 2013, little fire ants were detected on hapuu logs (Hawaiian fern) at retail stores on Maui and Oahu.  Since its detection, Oahu and Maui nurseries have been surveyed.  Five Oahu nurseries, three of which were in Waimanalo, were found to have small infestations of little fire ants, which were treated and are clear of the ants.

In late May, crews began treating a 6-acre area in Waimanalo, which included a 3.5- acre infestation area and buffer zone.  Follow up treatments are continuing.

Originally from South America, little fire ants are considered among the world's worst invasive species.

Little fire ants are tiny ants, measuring 1/16th inch long, are pale orange in color and move slowly.  Little fire ants move slowly, unlike the Tropical Fire Ant, which is established in Hawaii, which move quickly, and are much larger with a larger head in proportion to its body.  Little fire ants can produce painful stings and large red welts and may cause blindness in pets. T hey can build up very large colonies on the ground, in trees and other vegetation, and buildings and homes and completely overrun a property.

Suspected invasive species should be reported to the state's toll-free PEST HOTLINE – 643-PEST (7378).


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