ENTOMOLOGY INSECT NUMBERS ▪10 million species world wild ▪100,000 in United States ▪more insects per square mile than the entire world population of people ▪10,000 insects are classified as pests Beneficial Insects ▪Bees ▪Pollinating flowers ▪Beeswax ▪Silk ▪Biological Control ▪Assist in Decomposition Harmful Insects ▪Destroy Plants ▪Eat Seeds ▪Eat Leaves ▪Create entry for pathogens Harmful Insects ▪Destroy Plants ▪Eat Seeds ▪Eat Leaves ▪Create entry for pathogens ▪Contaminate Stored Grain Harmful Insects ▪Destroy Plants ▪Eat Seeds ▪Eat Leaves ▪Create entry for pathogens ▪Contaminate Stored Grain ▪Destroy Houses ▪Spread Diseases Harmful Insects ▪Poisonous to People ▪Pests to Animals ▪General Annoyance Insect Classification (And their cousins) ▪Kingdom = Animal ▪Phylum = Arthoropoda ▪Invertabrates - no backbone ▪exoskeleton - “outside” skeleton ▪jointed legs Insect Classification (And their cousins) ▪Classes = ▪Insecta ▪three body parts head, thorax, and abdomen Insect Classification (And their cousins) ▪Diplopoda ▪2 pair of legs per segment ▪Millipedes ▪Chilopoda ▪1 pair of legs per segment ▪Centipedes INSECT ORDERS Most Common Insect Orders (meaning you have to know them) • • • • • Lepidoptera – Butterflies and Moths Coleoptera – Beetles Hemiptera – True Bugs (scutellum) Hymenoptera – Bees and Wasps Orthoptera – Crickets and Grasshoppers Mouth Parts What does the damage! ▪Chewing - Grasshopper Mouth Parts What does the damage! ▪Chewing - Grasshopper ▪Sponging - housefly Mouth Parts What does the damage! ▪Chewing - Grasshopper ▪Sponging - housefly ▪Piercing/Sucking - fleas, lice, true bugs Mouth Parts What does the damage! ▪Chewing - Grasshopper ▪Sponging - housefly ▪Piercing/Sucking - fleas, lice, true bugs ▪Sucking - Cicada Mouth Parts What does the damage! ▪Chewing - Grasshopper ▪Sponging - housefly ▪Piercing/Sucking - fleas, lice, true bugs ▪Sucking - Cicada ▪Lapping - bees and wasps Mouth Parts What does the damage! ▪ Chewing - Grasshopper ▪ Sponging - housefly ▪ Piercing/Sucking - fleas, lice, true bugs ▪ Sucking - Cicada ▪ Lapping - bees and wasps ▪ Siphoning - butterflies, moths Insect life cycles GRADUAL OR INCOMPLETE ▪Young resembles adults ▪feed on same habitat ▪external wing development Incomplete Life Cycle Insect life cycles GRADUAL OR INCOMPLETE ▪Young resembles adults ▪feed on same habitat ▪external wing development ▪NYMPH - young insect ▪METAMORPHOSIS - series of changes Insect life cycles Complete ▪Egg ▪Larvae ▪Pupae (coccoon) ▪adult Complete Life Cycle