Ento Unit 2

Ento Unit 2

1. Blattodea

   • Blatta=cockroach
     • cockroaches
       • Characteristics
         • 1. Incomplete Metamorphasis
         • 2. Chewing Mouthparts
         • 3. Two pairs of wings
         • 4. Nocternial Omnivores
           • Antennae detect food and water, they keep antennae clean
         • 5. Flattned Body
         • 6. Eggs laid in ootheca
           • Female Cockraoches “Cares for young” by carrying *ootheca
             • Roaches pass on protazoans to young
               • protozoans help break down wood for food
                 • Termites evolved from Roaches
         • 7. Domestic pets
         • 8. Can be nuisance
           • Only 20 species are pests

2. Orthoptera

   • Orthos=straight
     • grasshoppers, crickets
       • Characteristics
         • 1. Incomplete metamorphosis
         • 2. Chewing mouthparts
         • 3. Front wings are narrow
         • 4. Back wings are fan-like
         • 5. Strong hind legs
         • 6. Males produce sound
           • Sound receptors on leg or abdomen
             • Each song is specific to the species
             • More chirps/second = higher temperature
             • Establish territory
             • Call a female
               • Stridulation: Production of sound to attract a mate
             • Warn others of predators
         • 7. Oviposit eggs in soil or a plant
         • 8. Plant eaters
         • 9. Major ag. pest
     • Petra=wings
     • locusts
       • Characteristics
         • #1 Agricultural insect pest in the world
         • Two phases: solitary (S); gregarious (G)
           • Stimulation of hairs on back legs of S L causes swarming: SL → GL
             • Swarm may cover 500 square miles and have 50 billion insects!
         • “Nymphs” stay in soil several years during drought
         • “Blew/flew” to the Americas from Africa

3. Hemiptera

   • bugs, aphids, scales, cicadas

4. Coleoptera

   • beetles and weevils

5. Lepidoptera

   • butterflies and moths

6. Mantodea

   • mantises and mantids

7. Phasmida

   • walking sticks