Which of the following is NOT a typical sign of pest infestation that may necessitate fumigation?

Excessive humidity is not typically regarded as a direct sign of pest infestation that would necessitate fumigation. While high humidity can create an environment conducive to pest infestations, such as mold growth or attract certain pests, it does not in itself indicate that pests are present. On the other hand, visible pests, unusual odors, and damage to structures or products are all clear indications of an existing pest problem. These signs suggest that a pest infestation is occurring and highlight the need for rapid action, including the possibility of fumigation, to eradicate the pests effectively. Recognizing the differences between environmental factors and direct signs of pest presence is essential for proper pest management strategies.