What behavior is primarily indicated by the presence of fruit flies in kitchens?

The presence of fruit flies in kitchens is primarily associated with decaying food. Fruit flies are attracted to fermenting fruits and vegetables, as well as other organic matter that is decomposing. Their life cycle begins when adult flies lay eggs in these decaying materials, providing the ideal environment for larvae to develop. This behavior signals that there is likely food waste or overripe produce present that has started to spoil, making it attractive to these pests.

While the presence of fruit flies could also suggest other issues such as inadequate cleaning, the direct link to decaying food is the main reason they are found in kitchens. This highlights the need for proper food storage and disposal practices to prevent infestations and maintain a hygienic kitchen environment.