Test 1 Flashcards
Smallest insect?
Tinkerbella nana
Why are insects good?
Pollination-co evolution, a third of crop plants, 200,000 flowering species, $$$$$$$$$// recycling//food and other products//controlling pests
Biggest insect?
Mass-Goliath beetle//
longest-chan’s megastick 56cm
largest wingspan-atlas moth
Fastest insect?
Running-5mph//flying-25to1200+
What percentage do insects make up out of all described animals?
75%
what percentage do insects make up out of all described species?
50%
Why are insects so successful?
Adaptable exoskeleton Small body size Short generation time Early dry-land colonizer Efficient flight Metamorphosis
Some urban pests?
Termites, ants, roaches, flies
Name at least 2
Some agricultural pests?
Aphids, stink bugs, moth larvae
Name at least 2
Some human/animal pests?
Fleas, lice, mosquito, flies, bed bugs
Name at least 2
Some insect vectored human diseases?
Malaria, West Nile virus, river blindness, typhus, yellow fever
(Name at least 2)
Some insect vectored animal diseases?
Heartworm, blue tongue
Name at least 2
Some insect vectored plant diseases?
Tomato spotted wilt, yellows, plum pox, fire blight
Name at least 2
How do insects affect environment?
Break down organic material Modify soil Make unlivable areas Help/injure some parts of environment Key element to some food webs
Insect that is in research?
Fruit flies
289 human genes misspelled cause disease in people
What is taxonomy?
Science of naming things
What are the three domains of our planet?
Bacteria
Archaea
Eukarya
What is bacteria?
No nuclear membrane
Mostly prokaryotes
What is archaea?
Complicated the accepted classifications
Prokaryotes of extreme environments
What is eukarya?
DNA contained in nucleus
Protests,plants,fungi, animals
What is phylum Arthropoda?
Exoskeleton-must molt to grow Segmented Jointed appendages Central nerve chord Open circulatory system Bilateral symmetry Sexual reproduction (may be lost)
Arthropod exoskeleton
Must shed skin to grow (3-6 times)
Adult insects do not molt or get bigger
What are some Crustacea?
Lobsters
Crabs
Woodlice
Rollypollies
What are some Arachnida?
Spiders
Scorpions
Lice
Ticks
What are crustaceans?
Mostly all aquatic 2 pairs of antennae Gills Five pairs of legs or more Head and thorax fused
What are Arachnida?
No antennae
Chelicerate mouthparts
Pedipalps
What are the orders of Arachnida?
Order araneae-spiders
Order scorpionida-scorpions
Order acari-ticks and mites
What are varroa mites?
Suck blood out of bees Weaken bees Bee colonies die Move with drifting and robbing bees Difficult to manage
What are tracheal mites?
Spend entire life in bee trachea
Weaken bees and affect flight
Kill bee colonies
Transmitted by bees drifting or robbing
What is class Chilopoda centipedes?
One pair of legs per segment
One pair of large antennae
Most predacious and venomous
What is class Diplopoda millipedes?
Two pairs of legs let segment
No venomous bite-noxious chemical release common
All insects are…?
Eukaryotes
How do you know it’s an insect?
3 body regions 3 pairs of legs Compound eyes Wings, usually One pair of antennae Trachea
Division exopterygota (nymph similar to adult)
Wings develop externally
Incomplete metamorphosis
Division endopterygota (wings as internal buds)
Wings develop internally
Complete metamorphosis
Insect taxonomy example
Domain Kingdom Phylum Class Order Family Genus Species Dominant kings play chess on fine grained sand
Thusanura silverfish
Indirect fertilization
Compound eyes
Abdominal appendages
Household pests
Ephemeroptera mayfly
Incomplete metamorphosis Four triangular wings with many veins Adults with vestigial mouthparts Abundant in permanent freshwater environments Aquatic Immatures feed on plants/debris Adults typically emerge synchronously
Order Odonata dragonfly
Two pair membranous wings
Chewing mouthparts
No cerci
Economic/ecological-predaceous and abundant
Egg, naid, adult-incomplete metamorphosis
Adults may live several months
Order Orthoptera grasshoppers katydids and crickets
Incomplete metamorphosis
Chewing mouthparts
Most males-sound producing organs
Blatraria (blattodea)
Roach
Many generations per year Incomplete metamorphosis Head concealed by pronotum Wings usually present Antennae long and slender
Roach integrated pest management
Roaches trigger asthma
Minimize food available Minimize water sources Caulk up cracks Don't bring them home Use sticky traps Use baits if necessary
Order blattaria suborder Isoptera termite
Soft bodied
Reproductives with four similar wings
Chewing mouthparts
Incomplete metamorphosis
Order mantodea praying mantis
Overwinter as eggs
Incomplete metamorphosis
Grasping forelegs
Order phasmatodea (Phasmida) Stick or leaflike
Incomplete metamorphosis 3cm to 20+ Long slender legs not adapted for jumping, digging, or grasping Chewing mouthparts Herbivorous Leg autonomy common
Order dermaptera earwig
Incomplete metamorphosis
Chewing mouthparts
Prominent cerci
Order phthiraptera lice
Permanent ectoparasites
Incomplete metamorphosis
Tarsi modified into a claw
Chewing or sucking mouthparts
How do you control head lice?
Transmitted by close contact or sharing infested materials Cannot live away from hosts Nit comb Lice shampoos Wash clothes and bedding Break the cycle
Order hemiptera bugs
Piercing/sucking mouthparts Incomplete metamorphosis Economic/ecological impact:many important agricultural and human health pests Some vector serious diseases Some species can be very numerous
Order hemiptera suborder Heteroptera
Forewing with basal half thickened and leather like
Includes predators, plant feeders, parasites
Aquatic Heteroptera families
Nepidae-water scorpion Ambush predator Breathing tube Corixidae-water boatmen Swim upright Can live in polluted water Predators Plastron Notonectidae-backswimmers Free swimming predators Hemoglobin Plastron
Family cimicidae
Bed bugs Flat oval Less than 6 mm Wings vestigial Feed on blood at night Not known to vector diseases
Bed bugs return
Infesting dorms, hotels, homes Bedding luggage Possible relation to restrictions on indoor insecticide Signs Unexplained bites Spots of blood or feces on bedding Look for the insect Inspect beds sofas
Family reduviidae
Kissing bug transmits Chagas’ disease
What is Chagas’ disease?
Tryoanosoma-released in feces Biting causes itching Victim scratches in trypanosomes Affects 18-20 million people Central and s. America Rural areas Chronic infection Heart, digestive system
Family pentatomidae
Stink bugs Large triangular scutellum Five segmented antennae Very common Some serious plant pests Some important predators
Order Hemiptera
Suborder Homoptera
Economic/ecologic-can be very numerous(prey item), important plant pests and transmit plant diseases
Homoptera
Auchenorrhyncha
Family cicadidae
\:large insects with wings Cicada Immatures live in the ground Dog day cicada Periodical cicada Reasons for periodicity Overwhelm predation Confuse predators with sound Predator population cannot build up in response to prey increase
Hemiptera
Homoptera
Auchenorryncha
Family:cercopidae spittle bugs
Nymphs cover themselves with froth
Auchenorryncha
Family membracidae
Treehoppers
Many structured to resemble plant parts
Nymphs often gregarious, may be tended by ants
Feed mostly on woody plants
Auchenorryncha
Family cicadellidae
Important plant disease vectors, particularly viruses
Phony peach disease
Pierce’s disease grapes
Corn stunt
Aphids and thrips
Transmitted diseases
Most important vectors
Complex life cycles of aphids
Eggs overwinter-spring hatch-birth of wingless females-migrate-women births-migrate-male and female
Family adelgidae
Hemlock wooly adelgid No males Kill trees in 3-10years Pesticides Predators
Scale insect life cycle
Eggs hatch under scale
Crawlers emerge to find feeding location
First molt-Armored scale females lose legs and antennae
Males pupate u see sax and emerge with wings but no mouthparts
Order thysanoptera
Thrips
Transmit plant viruses
Tomato spotted wilt tosovirus
Occurs in Georgia peanuts
What is the value of fast production?
One female aphid-up to 100 offspring which are ready to reproduce in a week
Predator populations are slower to respond
Rapid population growth=big cycles
Endopterygota
Complete metamorphosis
Life stages
Egg, larva, pupa, adult
Neuroptera
Lacewing
Chewing mouthparts Large lateral eyes Eggs in stalks Predaceous larva and adults Agriculture predators
Antlions
Larvae make pits in soil
Order Coleoptera
Beetles
Most species Four wings thickened leathery hard Chewing mouthparts Hind wings usually longer that the elytra Very small to large Antennae variable May be sexually dimorphic
Family carabidae
Ground beetles
Most environments nocturnal
Often found under rocks leaf litter
Predaceous as larvae and adults
Family carabidae
Tiger beetles
Often quick fliers
Larvae predaceous
Ambush out of hole
Coleoptera: family dytiscidae
Predaceous diving nettle
Carry air bubble beneath elytra
Larvae have suctorial mouthparts
Coleoptera:family gyrindae
Whirligig beetles
Four compound eyes
Often gregarious
Antennae enable them to avoid crashing
Coleoptera
Family curculionidae
Weevils
Largest family of beetles
Larvae typically hidden
Coleoptera
Chrysomelidae
Leaf beetles
Cucumber beetles are key pests if vine crops or cucurbits (cucumber, squash, melons)
Oval body shape
Coleoptera
Cerambycidae
Long horned beetles
Larvae typically in dead or living wood
Long antennae
Coleoptera
Scarabaeidae
Scarabs
Some serious pests
White grubs and Japanese beetles