ENTOMOLOGY

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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
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Beneficial Insects
?Bees - ?Pollinating flowers ?Beeswax ?Silk ?Biol
ogical Control ?Assist in Decomposition
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Harmful Insects
?Destroy Plants ?Eat Seeds ?Eat Leaves ?Create
entry for pathogens
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Harmful Insects
?Destroy Plants ?Eat Seeds ?Eat Leaves ?Create
entry for pathogens ?Contaminate Stored Grain
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Harmful Insects
?Destroy Plants ?Eat Seeds ?Eat Leaves ?Create
entry for pathogens ?Contaminate Stored
Grain ?Destroy Houses ?Spread Diseases
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Harmful Insects
?Poisonous to People ?Pests to Animals ?General
Annoyance
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Insect Classification

• (And their cousins)

?Kingdom Animal ?Phylum Arthoropoda ?Invertabr
ates - no backbone ?exoskeleton - outside
skeleton ?jointed legs
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Insect Classification

• (And their cousins)

?Classes ?Insecta ?three body parts head,
thorax, and abdomen
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Insect Classification

• (And their cousins)

?Diplopoda ?2 pair of legs per segment ?Millipedes
?Chilopoda ?1 pair of legs per
segment ?Centipedes
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• INSECT ORDERS

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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

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Mouth Parts

• What does the damage!

?Chewing - Grasshopper
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Mouth Parts

• What does the damage!

?Chewing - Grasshopper ?Sponging - housefly
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Mouth Parts

• What does the damage!

?Chewing - Grasshopper ?Sponging -
housefly ?Piercing/Sucking - fleas, lice, true
bugs
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Mouth Parts

• What does the damage!

?Chewing - Grasshopper ?Sponging -
housefly ?Piercing/Sucking - fleas, lice, true
bugs ?Sucking - Cicada
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Mouth Parts

• What does the damage!

?Chewing - Grasshopper ?Sponging -
housefly ?Piercing/Sucking - fleas, lice, true
bugs ?Sucking - Cicada ?Lapping - bees and
wasps
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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
• probiscus

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Insect life cycles

• GRADUAL OR INCOMPLETE

?Young resembles adults ?feed on same
habitat ?external wing development
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Incomplete Life Cycle
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Insect life cycles

• GRADUAL OR INCOMPLETE

?Young resembles adults ?feed on same
habitat ?external wing development ?NYMPH - young
insect ?METAMORPHOSIS - series of changes
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Insect life cycles

• Complete

?Egg ?Larvae ?Pupae (coccoon) ?adult
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Complete Life Cycle
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