When they are looking for food, they will try to eat anything.
Seeds and insects.
Chewing insects are defined as those having chewing mouthparts. These insects feed by biting, tearing, and ripping plants and they can damage plants by leaving missing leaves, irregular holes in stems and leaves, and leaving semicircular or circular holes in leaves.
Sucking insects feed on plant sap or animal fluids by piercing and sucking with specialized mouthparts, like aphids or mosquitoes. Chewing insects, on the other hand, physically consume plant material by cutting and grinding it with their mandibles, like caterpillars or grasshoppers.
Ants attack
Its when insects enter your scalp and start chewing your hair.
Ants
Candals
Not normally as they are biting and chewing insects. Diseases are normally spread by sap sucking insects like Aphids
Insects can damage the crop by biting off and eating parts, chewing on it, piercing and then sucking out sap, and by vectoring in disease.
Walking sticks.
The reason that insects attack natural fibers and not synthetic fibers is because natural fibers appeal to insects as food while they do not know what the f*ck synthetic fiber is.
Pheromones are used by insects to communicate. Sexual pheromones allow males to track females. Attack or alarm pheromones tell bees to join in the attack on an enemy.