Transcript Introduction to Entomology Power Point

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)
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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