to the

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Welcome to the World of Insects
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Importance of Insects to Agriculture
PESTS
eat our foods - damage our crops
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• spread plant, human, and animal
  diseases

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Importance of Insects to Agriculture
PESTS

• infest our homes
• infest our animals and our bodies

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• sting us (venomous)

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Importance of Insects to Agriculture
PESTS
- annoy us - cause unsightly damage
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Importance of insects to Agriculture
BENEFITS
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pollinate our plants
- degrade and recycle nutrients
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Importance of Insects to Agriculture
BENEFITS
- feed on pest species
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- food for other animals
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Importance of insects to Agriculture
BENEFITS

• used in research and medicine
• provide natural products (e.g.,
  honey, beeswax,
• silk, dye, and
• shellac)

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MOST OF US RECOGNIZE BEETLES AS MAJOR PESTS!!
DID YOU KNOW THATSOME PEOPLE TREASURETHEM AS
COLLECTIBLES??
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How many insects are there in the world?
- about one million insect species have been
described
- scientists estimate that there may be as many
as 10 million different types of insects!!
- there are about 200 million insects for every
human on earth!!
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How many insects are there in the world?

• insects comprise about
• 10 of the earths weight

• insects represent about
• 80 to 85 of all life on earth

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The insect population of the world is
at least
1,000,000,000,000,000,000
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Averaging the weight of each insect
as 2.5 mg, the weight of the earth's
insect population exceeds that of
human inhabitants by

a factor of 12.
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Fortunately, most of these insects cause us no
harm
- only about 10 of all insects cause us the
greatest amount of pain, anguish, and economic
loss
- because each one of you will come into contact
with many types of organisms, it is important to
properly identify them to effectively manage
them
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What makes an organism an INSECT?? generally
speaking
- three body parts head, thorax, and abdomen
- six legs
- one pair of antennae
- one pair of compound eyes
- an exoskeleton
- most adult insects have wings
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INSECTS are experts at two biological functions
1) eating
2) reproducing
unfortunately, they do both of them extremely
well!
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How can we separate or classify INSECTS??
1) by the use of a written key generally uses
body parts
2) by the type of damage that they cause e.g.,
borer, gall former, leaf feeder
3) by the type of mouthparts that they have or
their manner of feeding e.g., chewing or
piercing-sucking
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These types of classifications help us to
quickly place a general label on the problem
insect!!
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Types of Mouthparts piercing-sucking
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Types of Mouthparts chewing
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Types of wings and venation of wings
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Types of development
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WHITE ANTS
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CAN YOU MATCH THESE PHYSICAL WONDERS?

• Run 50 body lengths in 1 second
• (cockroach)

a six-foot person running ca. 206 miles per
hour
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CAN YOU MATCH THESE PHYSICAL WONDERS?

• Run 50 body lengths in 1 second
• (cockroach)

2) Flap your arms (wings) 300 times in 1
second (flying mosquito)
about one million times per hour
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CAN YOU MATCH THESE PHYSICAL WONDERS?

• Run 50 body lengths in 1 second
• (cockroach)

2) Flap your arms (wings) 300 times in 1
second (flying mosquito)
3) Jump 130 times your height (flea)
a six-foot person jumping 780 feet
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CAN YOU MATCH THESE PHYSICAL WONDERS?

• Run 50 body lengths in 1 second
• (cockroach)

2) Flap your arms (wings) 300 times in 1
second (flying mosquito)
3) Jump 130 times your height (flea)
4) Lift 10-50 times your weight (ant)
a 200 lb person lifting one to five tons!
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CAN YOU MATCH THESE PHYSICAL WONDERS?

• Run 50 body lengths in 1 second
• (cockroach)

2) Flap your arms (wings) 300 times in 1
second (flying mosquito)
3) Jump 130 times your height (flea)
4) Lift 10-50 times your weight (ant)
5) Hear with your legs (cricket)
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INSECTS THEY ARE EVERYWHERE!!

1. in the air

2) in the water
3) in the soil
4) in our homes
5) on our plants
6) on our animals
7) on our bodies!!