Two more adult Mediterranean fruit flies were found in south Florida the week of June 28, raising the total to 50 adults and 11 larvae as of June 30.

Millions of sterile flies are being released in and around Boca Raton to combat further infestation, said Denise Feiber, public information director of the Florida Department of Agriculture and Consumer Services. The distance between the southernmost and northernmost finds is 4.8 miles, she said.

The flies have been found in residential neighborhoods in Boca Raton and Del Ray. None of the live flies or larvae has been found within 20 miles of a commercial citrus growing area, Feiber said. Some vegetable fields, however, are less than 10 miles away.

The flies have been found on mango, loquat and other trees. Mediterranean fruit flies can attack more than 250 fruits, vegetables and nuts, including apples, citrus, mangoes, tomatoes and peppers.

Florida has 56,000 traps monitoring the pest throughout the state. Inspectors check the traps every 21 days and every 14 days in high-risk areas.