ch 1 pest identification

• Perennial weeds are generally the most difficult to control because they...

  can reproduce and spread from storage organs such as rhizomes and tubers
• Which insect order includes species known to transmit some plant diseases?

  Thysanoptera (Thrips)
• What feature characterizes vertebrates?

  has backbone
• Which order of insects includes species that are pests of living plants?

  Heteroptera (True Bugs)
• The immature stages of an insect are known as

  instars
• Which of group of insect orders include both pests and beneficials that attack pest insect species?

  Hymenoptera (wasps/bees/ants/sawflies/horntails), Thysanoptera (thrips), Heteroptera (true bugs - plant, bed, assassin, damsel bugs)
• Which insects suck plant juice plant cells?

  Homoptera (aphids, whiteflies, cicadas, psyllid, leaf/tree hoppers), Thysanoptera (Thrips), Mites
• Which part of a plant do nematodes most commonly attack?

  roots and other underground plant parts
• Which plant disorder cannot be transmitted from plant to plant?

  abiotic
• Ants belong to the insect order

  Hymenoptera
• Which insects have chewing mouth parts?

  caterpillars
• Vertebrates include which type of animals?

  birds and mice
• Which animals are arthropods?

  insects, spiders, mites
• Which pest would cause leaf stippling?

  mites
• An insect that passes through complete metamorphosis would have which life stages?

  Egg, larva, pupa, adult.
• Powdery mildew on plants is caused by...

  fungus
• An abiotic disorder of a plant can be caused by 


  • irrigation problems (too little/much water)
  • weather
  • nutrient imbalances
  • chemicals
• What are characteristics of weeds?

  1. some weeds are poisonous to people/animals
  2. weeds interfere with the safety or use of landscaped areas
  3. most weeds produce large quantities of seeds, even under adverse conditions
• What are nematodes?


  Nematodes are a large group of species of unsegmented worms
• What damage do nematodes cause to plants?

  • inject plant tissue with salivary secretions that cause root cells to enlarge and form knots/galls
  • root damage
• What are the symptoms that a nematode affected a plant?

  • stunting
  • loss of vigor
  • yellowing
  • general decline
  • galls in place of seeds
• What are Invertebrates?


  Animals without a backbone.

  • arthropods (insects, spiders, ticks, mites)
  • nematodes (worms)
  • snails and slugs
• What is the Order name of THRIPS?

  Thysanoptera
• What is the Order name of EARWIGS?

  Dermaptera
• What is the Order name of TRUE BUGS?

  Heteroptera
• What bugs are part of HOMOPTERANS?

  • aphids, cicadas, whiteflies, treehoppers
• What bugs are part of HYMENOPTERA?

  bees, wasps, ants, sawflies, horntails
• What insects are part of LEPIDOPTERANS?


  butterflies, moths, skippers
• What damage do true bugs cause?

  • damage plant cells
  • may cause deformed flowers, fruits, leaves, and stems
  • alter plant's normal growth
• What class and order are spiders?

  Class: Arachnida

  Order: Arachnida
• What arthropods are both BENEFICIAL and PESTS?

  spiders and mites
• What class and order are mites?

  Class: Ararchnida

  Order: Acari
• What damage do mites cause?

  mites puncture plant cells with their mouthparts and suck fluids
• What insects are within the Orthopterans group?

  crickets, grasshoppers, locusts, katydids
• What damage do Orthopterans cause?

  feed on plants which may lead to serious injury, defoliation in fruit crops, rangeland, and vegetable gardens
• What class and order are earwigs?

  class: insecta

  order: dermaptera
• What insect has pinchers known as "cerci" that extend from end of abdomen?

  earwigs
• What insect hibernates as an adult?

  earwigs
• What class and order are thrips?

  class: insecta

  Order: thysanoptera
• How many instars do thrips pass through?

  4 - feed first 2 installs and rest last 2 instars

  • wings present after LAST instar