Insect Identification - UW · PDF fileInsect Identification Developed by: ... but limited...
Transcript of Insect Identification - UW · PDF fileInsect Identification Developed by: ... but limited...
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Insect Identification
Developed by: Scott Schell & Dr. Alex
Latchininsky CES – Entomology - Renewable Resources
Univ. of Wyoming, 2007
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Taxonomy: science of classifying organisms
Names help humans organize and talk about things.
However, you don’t have to be a
taxonomist to make correct, effective management identifications.
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The Basic Organization
• Kingdom - Animalia • Phylum - Arthropoda • Class - Insecta • Order - Orthoptera • Family - Acrididae • Genus - Hesperotettix • Species - viridis
Multiple common names: clown or snakeweed grasshopper
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The Critical Categories
• Kingdom - Animalia • Phylum - Arthropoda • Class – Insecta • Order - Orthoptera • Family - Acrididae • Genus - Hesperotettix • Species - viridis
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1. ID books are organized around
these classification levels. 2. Many times, Family level ID is
sufficient for management. 3. For genus or species level ID you
need specialized taxonomic keys (if available) or expert assistance.
The Importance of Insect Order and Family
identification
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How you can identify insects
• Know the basic body forms of adult and immature insects.
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The Diagnostic Characteristics of:
Class Insecta Adult Insect Characters: • 3 pairs of legs • 3 body regions (head, thorax,
abdomen) • Zero, 1, or 2 pairs of wings • 1 pair of antennae
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The Diagnostic Characteristics of Insecta:
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The Diagnostic Characteristics of
Insecta?
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How you can identify insects
• Know the basic body parts used as diagnostic characters.
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VERY important! determine feeding damage
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Tarsi = Feet shaped for swimming shaped for climbing
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How you can identify insects
• Know the basic body forms of adult and immature insects.
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Insect Life Cycles Immature insect’s forms and features can vary greatly from the adult stage.
Immature dragonfly Adult dragonfly
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Simple Metamorphosis
Insects must molt or shed the exoskeleton to grow in size.
Annual life cycle illustrated.
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Complete Metamorphosis egg
larva or caterpillar
chrysalis or pupa
Monarch butterfly adult
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Insect Larvae forms
Vermiform – no legs, worm-like; grub or maggot.
Bronze birch borer
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Insect Larvae forms Vermiform – with no head capsule, just hooks
House fly
a.k.a. maggot
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Insect Larvae forms Vermiform – with head capsule no legs
fungus gnat by Mark Ascerno
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Insect Larvae forms Campodeiform – legs well developed, mobile.
7-spotted lady beetle
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Insect Larvae forms
Scarabaeiform – have legs but limited locomotion.
Tenlined June beetle
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Insect Larvae forms
Elateriform – long, hardened, cylindrical body with short legs.
Sugarbeet wireworm larva
Click beetle Elateridae Family
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Insect Larvae forms
Eruciform – six thoracic legs with abdominal prolegs for movement.
Black Swallowtail larva and adult.
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How you can identify insects
• Get good guide books for general and specialized uses. Some ID books are written specifically on plant pest and use the plant species and damage done to determine species.
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Some good books:
• Peterson Field Guides: Insects • Photographic Atlas of Entomology
and Guide To Insect Identification • How to Know the Immature Insects • Insects and Diseases of Woody
Plants of the Central Rockies* • Pests of the West *
Book title list hand-out .
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Peterson’s Field Guide Orders
• 26 Orders: Many Orders won’t be encountered or noticed because of their size, habitat, or life cycle. Some new classifications and new insect Orders in current literature, but it is a good general reference.
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Principle Insect Orders of Horticultural Importance
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Order Orthoptera - Grasshoppers, Crickets, Katydids, *Mantids, *Walkingsticks, *Cockroaches
*These are now separate Orders in new classifications; Mantodea, Phasmatodea, Blattaria, respectively.
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Order Orthoptera - Suborder Caelifera “short antennae”
pygmy grasshopper not a pest
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Order Orthoptera - Suborder Ensifera - Crickets, Katydids
Mormon cricket Jerusalem cricket
Mole cricket
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Order Orthoptera - *Mantids
*Now Order Mantodea in new classifications. .
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Order Orthoptera - *Walkingsticks
*Now Order Phasmatodea in new classifications.
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Order Orthoptera - *Cockroaches
*Now Order Blattaria in new classifications.
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Order Dermaptera - Earwigs “skin-wing”
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Order Thysanoptera - Thrips “fringe-wing”
Fringe of hairs around wings is a diagnostic character. Not all species have wings and the nymphs don’t either.
Common thrips scrap off the top layer of leaves and feed. Can be human pests and cause skin irritation.
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Order Hemiptera - True Bugs “half-wing”
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Order Hemiptera - True Bugs
Beak starts from front of head and folds back when not in use.
two texture wings
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Order Homoptera - Hoppers “same-wing”
Piercing sucking beak from base of head
Adult and nymph
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Order Homoptera - Aphids
Wingless
Winged
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Order Homoptera – Cicadas aka periodic locusts
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Order Homoptera – Hoppers and Planthoppers
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Order Homoptera - Whiteflies
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Order Homoptera - Scale Insects “Soft Scale” example “Hard Scale” example
Immobile as adults, females, secret hard or soft covering
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Order Homoptera - Mealybugs
secret waxy covering over their bodies
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Order Coleoptera - Beetles “sheath-wing”
Ladybird larva
Ladybird adult
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Coleoptera - Beetles Front wings are called elytra and meet in a straight line.
Typical front wings spread slightly.
A few have short front wings.
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Order Lepidoptera - Butterflies and Moths
“scale-wing”
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Butterflies and Moths have wing scales that
give color and pattern to the wings
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Order Neuroptera - Lacewings “nerve-wing”
Both adults (left) and larvae (below) are beneficial predators.
Egg
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Order Diptera - Flies “two-wing”
This Robber fly from Asilidae mimics a bee for defense.
Syrphid fly larva hunting for aphids.
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Order Diptera - Flies
Modified and reduced hind wings called Halteres are the diagnostic character
Crane fly
Halteres
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Hymenoptera - Bees “membrane-wing”
Adult Larvae in cells
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Hymenoptera - Non-stinging Wasps
A dead aphid, killed by the wasp larvae developing inside it.
many tiny, very specialized species are found in nature
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Hymenoptera - Stinging Wasps Voracious predators of other insects. Have warning coloration
2 pairs of wings, “Wasp waist”
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Hymenoptera - Ants
The thin connection between the thorax and abdomen has one or two humps in all ants.
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Hymenoptera - Sawflies The worst plant pests in the Order. They lack the wasp waist of other members of the Order.
Adult
Plant feeding larvae