Insect Identification - University Of Wyoming

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InsectIdentificationDeveloped by:Scott Schell & Dr. AlexLatchininskyCES – Entomology Renewable ResourcesUniv. of Wyoming,2007

Taxonomy: science ofclassifying organismsNames help humans organize and talkabout things.However, you don’t have to be ataxonomist to make correct, effectivemanagement identifications.

The Basic Organization Kingdom - AnimaliaPhylum - ArthropodaClass - InsectaOrder - OrthopteraFamily - AcrididaeGenus - HesperotettixSpecies - viridisMultiple common names:clown or snakeweedgrasshopper

The Critical Categories Kingdom - AnimaliaPhylum - ArthropodaClass – InsectaOrder - OrthopteraFamily - AcrididaeGenus - HesperotettixSpecies - viridis

The Importance of InsectOrder and Familyidentification1. ID books are organized aroundthese classification levels.2. Many times, Family level ID issufficient for management.3. For genus or species level ID youneed specialized taxonomic keys (ifavailable) or expert assistance.

How you can identifyinsects Know the basic body forms of adultand immature insects.

The DiagnosticCharacteristics of:Class InsectaAdult Insect Characters: 3 pairs of legs 3 body regions (head, thorax,abdomen) Zero, 1, or 2 pairs of wings 1 pair of antennae

The DiagnosticCharacteristics of Insecta:

The DiagnosticCharacteristics ofInsecta?

How you can identifyinsects Know the basic body parts used asdiagnostic characters.

VERY important!determine feeding damage

Tarsi Feetshaped for swimmingshaped for climbing

How you can identifyinsects Know the basic body forms of adultand immature insects.

Insect Life CyclesImmature insect’s forms and features canvary greatly from the adult stage.Immature dragonflyAdult dragonfly

Simple MetamorphosisInsects must molt orshed the exoskeletonto grow in size.Annual life cycle illustrated.

Complete MetamorphosiseggMonarchbutterfly adultlarva or caterpillarchrysalis or pupa

Insect Larvae formsVermiform – no legs,worm-like; grub or maggot.Bronze birch borer

Insect Larvae formsVermiform – with no head capsule, just hooksa.k.a. maggotHouse fly

Insect Larvae formsVermiform – with head capsule no legsfungus gnatby Mark Ascerno

Insect Larvae formsCampodeiform – legs welldeveloped, mobile.7-spotted lady beetle

Insect Larvae formsScarabaeiform – have legsbut limited locomotion.Tenlined June beetle

Insect Larvae formsElateriform – long, hardened,cylindrical body with short legs.Sugarbeet wireworm larvaClick beetleElateridae Family

Insect Larvae formsEruciform – six thoracic legswith abdominal prolegs formovement.Black Swallowtail larvaand adult.

How you can identifyinsects Get good guide books for generaland specialized uses. Some IDbooks are written specifically onplant pest and use the plant speciesand damage done to determinespecies.

Some good books: Peterson Field Guides: Insects Photographic Atlas of Entomologyand Guide To Insect Identification How to Know the Immature Insects Insects and Diseases of WoodyPlants of the Central Rockies* Pests of the West *Book title list hand-out .

Peterson’s Field GuideOrders 26 Orders: Many Orders won’t beencountered or noticed because oftheir size, habitat, or life cycle.Some new classifications and newinsect Orders in current literature,but it is a good general reference.

Principle Insect Orders ofHorticultural Importance

Order Orthoptera - Grasshoppers,Crickets, Katydids, *Mantids,*Walkingsticks, *Cockroaches*These are now separate Orders in new classifications;Mantodea, Phasmatodea, Blattaria, respectively.

Order Orthoptera - Suborder Caelifera“short antennae”pygmy grasshopper not a pest

Order Orthoptera - Suborder Ensifera- Crickets, KatydidsJerusalem cricketMormon cricketMole cricket

Order Orthoptera - *Mantids*Now Order Mantodea in new classifications.

Order Orthoptera - *Walkingsticks*Now Order Phasmatodea in new classifications.

Order Orthoptera - *Cockroaches*Now Order Blattaria in new classifications.

Order Dermaptera - Earwigs“skin-wing”

Order Thysanoptera - Thrips“fringe-wing”Fringe of hairs around wingsis a diagnostic character.Not all species have wingsand the nymphs don’t either.Common thrips scrap offthe top layer of leaves andfeed. Can be human pestsand cause skin irritation.

Order Hemiptera - True Bugs“half-wing”

Order Hemiptera - True Bugstwo texture wingsBeak starts from front of headand folds back when not in use.

Order Homoptera - Hoppers“same-wing”Piercing sucking beak frombase of headAdult and nymph

Order Homoptera - AphidsWingedWingless

Order Homoptera – Cicadasaka periodic locusts

Order Homoptera – Hoppersand Planthoppers

Order Homoptera - Whiteflies

Order Homoptera - Scale Insects“Soft Scale” example“Hard Scale” exampleImmobile as adults, females, secret hard or soft covering

Order Homoptera - Mealybugssecret waxy covering over their bodies

Order Coleoptera - Beetles“sheath-wing”Ladybird larvaLadybird adult

Coleoptera - BeetlesFront wings are called elytra and meet in a straight line.Typical front wings spreadslightly.A few have short frontwings.

Order Lepidoptera Butterflies and Moths“scale-wing”

Butterflies and Mothshave wing scales thatgive color and pattern tothe wings

Order Neuroptera - Lacewings“nerve-wing”Both adults (left) andlarvae (below) arebeneficial predators.Egg

Order Diptera - Flies“two-wing”This Robber fly from Asilidaemimics a bee for defense.Syrphid fly larvahunting for aphids.

Order Diptera - FliesModified and reduced hind wingscalled Halteres are the diagnostic characterCrane flyHalteres

Hymenoptera - Bees“membrane-wing”AdultLarvae in cells

Hymenoptera - Non-stinging Waspsmany tiny, veryspecialized speciesare found in natureA dead aphid, killed by the wasp larvaedeveloping inside it.

Hymenoptera - Stinging WaspsVoracious predatorsof other insects.Have warning coloration2 pairs of wings,“Wasp waist”

Hymenoptera - AntsThe thin connection between the thorax and abdomenhas one or two humps in all ants.

Hymenoptera - SawfliesThe worst plant pests in theOrder. They lack the waspwaist of other members ofthe Order.AdultPlant feeding larvae

Book title list hand-out . Peterson’s Field Guide Orders 26 Orders: Many Orders won’t be encountered or noticed because of . - Crickets, Katydids Mormon cricket Jerusalem cricket Mole cricket . Order Orthoptera - *Mantids *Now Order Mantodea in new classifications. .

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