Most of these insects produce songs by rubbing body parts together. Grasshoppers are rather general feeders and can cause locally severe injury to ornamental plants. In most landscapes and nurseries, they are usually of little economic importance. These insects are better known for their evening and night-time songs than for their damage to landscape plants. These insects, although they feed on foliage and live in the canopies of trees, usually do not cause significant plant damage.
Katydids are usually green and are well camouflaged on the plant.
These insects are also well known for their singing abilities. The mole crickets can be serious pests of turf, particularly in regions south of us. The preferred food of crickets varies greatly among types of crickets, but most do not cause great harm to landscape plants. Their damage comes not from their feeding but from their egg laying on or in the plant. These can sometimes be a big problem in commercial nurseries, where damage can lead to cankers and unsightly appearances to the plant.