Females can start laying eggs as soon as you see adults. Once the adult flies are discovered, management decisions should be made. Adult flies are tan with red eyes and a tiny 2-3mm-long (up to a one-eighth of an inch). Males have characteristic dark spots on their wings that can easily be seen with a magnifying glass. Adults live for up to 2 weeks, and females can lay up to 300 eggs. Development from egg to adult can occur in as little as eight days, and 10 or more generations may occur within a season.