Which group of pests are known to be attracted to stored products, particularly grains?

The group of pests that are attracted to stored products, especially grains, includes a variety of insects, and all options listed are correct. Ants, beetles, and moths all exhibit behavior that leads them to infest stored grains and other food products.

Ants, particularly species like the pharaoh ant or carpenter ant, can find their way into grain storage areas searching for food. They are known to scavenge and can compromise the integrity of stored food products by contamination.

Beetles, such as the rice weevil and the confused flour beetle, are notoriously known for infesting grains. These pests can cause significant damage, chewing through packaging and contaminating the grains, leading to both economic loss and food safety concerns.

Moths, particularly pantry moths like the Indian meal moth, are also common stored product pests. Their larvae can infest a range of stored foods, including grains, and can be difficult to control once they establish.

Since all three groups of pests are attracted to and can cause problems in stored products, the correct answer encompasses the full range of these pests. Understanding the behavior and types of pests associated with stored products is vital for effective pest management strategies.