• 1 pairs of antennae, a body in 3 major segments (head, thorax and abdomen), 3 pairs of legs on thorax, many have wings.
• Metamorphosis: egg>larvamolt>pupa>adult
• Ametamorphosis
• The way in which an insect feeds depends on the structure of its mouth parts.
• Orthoptera: grasshoppers, crickets
• Coleoptera: beetles, weevils
• Homoptera: aphids, whiteflies, leafhoppers
• Lepidoptera: butterflies
• Economic impacts: yield loss
• Environmental impacts: uncontrollable invasive species, invasive vectors, contamination by insecticides,
• Health and safety impacts: insects can annoy people and domestic animals.