CH 3 pesticides

• Acaricide or miticide

  mite control
• Algaecide

  algae control
• Attractant


  attract pests or other animals and invertebrates
• avicide

  bird control
• bactericide

  bacteria control
• defoliant

  remove plant foliage
• desiccant

  remove water from arthropod pests
• fungicide

  fungal control
• growth regulator

  regulate plant or animal growth
• herbicide

  weed control
• insecticide


  insect control
• molluscicide

  snail or slug control
• nematicide


  nematode control
• piscicide


  fish control
• predacide

  predator mammal control
• repellent

  repel pest animals or invertebrates
• rodenticide

  rodent control
• silvicide


  tree and woody shrub control
• Which part of the label gives you an indication of the toxicity of the pesticide?

  Signal word
• The toxicity of a pesticide is usually measured by its...

  LD50
• Which signal word indicated the LEAST hazardous pesticide?

  Caution
• The toxicity of a pesticide is the...

  capacity to cause injury
• A post-emergent contact herbicide

  causes injury to any part of the plant it touches
• How much active ingredient would be found in a 20 lb bag of a 25W formulation?

  5 lbs a.i.
• How much active ingredient would there be in a 5 gallon bottle of a 4EC formulation?

  20 lbs
• Which of the following formulations requires no further agitation once it is mixed fully with water?

  Soluble powder (SP)
• The tendency of ants to take poisoned bait back to the nest...

  contributes to the effectiveness of ant baits
• The way a pesticide destroys or controls a target organism is its

  mode of action
• If a mixture of two pesticides in the spray tank results in clumping and the spray nozzles clog up, the mixture is...

  incompatible
• The hazard of a pesticide includes its potential to

  cause injury
• A pesticide with the signal word "Warning" will generally be less hazardous than a pesticide with the signal word "Danger"
• A persistent pesticide is one that is...

  active in the environment for long periods
• What is half-life?


  the time it takes for half of the pesticide to break down in the environment or change from its original form
• What are persistent pesticides?

  persistent pesticides are those that remain in their active state in the environment for long periods of tiem
• Explain the role of adjuvants in pesticide applications

  Adjuvants are materials you can add to spray tanks to improve mixing and application qualities or to enhance pesticide performance - i.e. stickers or thickeners 
• List the indications that a tank mix of two or more pesticides is incompatible

  • precipitation of flakes
  • crystals
  • oil clumps
• List and define factors that influence efficacy of pesticides

  • pesticide uptake
  • pest life stage
  • pesticide formulation
  • application method
  • environmental conditions
  • timing of application
  • pesticide restitance
• How do CONTACT PESTICIDES control pests?

  Direct contact -- applied to the surface of plants or target areas, these pesticides remain on the external surface and exert their toxic effects on pests through physical contact. 
• How do SYSTEMIC PESTICIDES control pests?

  absorbed and distributed within the plant or target organism, providing internal protection against pests. -- applied to soil or taken up by plants through roots, leaves, etc.
• What is Herbicides’ Mode of Action?

  causes pesticides to destroy weeds by damaging leaf cells, also interferes with the plant’s ability to grow normally