they have horn like jaws which they use for biting and chewing the stems,leaves,and fruit of trees...examples are grasshoppers,caterpillar,grubs and beetles
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.
When they are looking for food, they will try to eat anything.
Its when insects enter your scalp and start chewing your hair.
Candals
Not normally as they are biting and chewing insects. Diseases are normally spread by sap sucking insects like Aphids
some chewing gum gives you healthier teeth for example orbit complete as i eat that.
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.
Mechanical digestion.
Insects do not have fangs. Fangs are specialized teeth used for injecting venom, typically found in animals like spiders and snakes. Insects have mouthparts that are adapted for chewing, sucking, or lapping up food.
Well beetles and grasshoppers are alike one because obviously they are both animals which are insects and two because they are both insects that have chewing mouth parts. So mosquitoes, moths, butterflies, flies and so on are insects that have sucking mouth parts, where as the ants, bees, wasps, beetles, weevils, grasshoppers, crickets and so on eat by biting and chewing not sucking.