What can be a sign of a serious infestation of German cockroaches?

Finding droppings is a significant indicator of a serious infestation of German cockroaches. These droppings are small, dark, and can resemble pepper flakes or coffee grounds. Their presence indicates not only that cockroaches are present but that they are breeding in the area. Cockroaches produce a substantial amount of droppings, and an increased quantity can suggest an established and advancing population within a space. Monitoring for these droppings can help in assessing the level of infestation and is crucial for implementing effective control measures.

While the other options may suggest the presence of pests or environmental issues, they do not specifically indicate the severity of a cockroach infestation in the same way that droppings do. For instance, seeing cockroaches during the day can sometimes indicate a severe infestation, but these insects are primarily nocturnal, so daytime sightings may also mean they are being disturbed or are disoriented, rather than confirming a critical level of infestation. The presence of spiders does not correlate directly with cockroaches and is not a reliable indicator of their severity. Similarly, strong odors can be associated with various issues, including food spoilage or other pest infestations, but they do not provide direct evidence of the magnitude of a German cockroach