Idaho Pesticide Applicator Exam -
Chapter 4 Questions Fully Solved.
What is an Active Ingredient? - Answer The component of a pesticide that controls the target
pest
What are Inert Ingredients? - Answer Additives that make a pesticide more effective, safer, or
easier to apply.
What are Pesticide Formulations? - Answer Mixtures of Active and Inert ingredients
What are Emulsifiable Concentrates? Advantages and Disadvantages - Answer They're liquid
formulations with the active ingredient dissolved in 1 or more petroleum solvents.
Advantages:
-Easy to handle and transport
-Little agitation required
-Non-abrasive to equipment
Disadvantages:
-May have high phytotoxicity
-May be flammable
-May be easily absorbed through skin
What is an Emulsion? Advantages and Disadvantages - Answer A mixture of 2 liquids that
aren't soluble to each other. One is suspended as very small droplets in the other with the aid of
an emulsifying agent. Ex.) oil in water
What are Solutions? Advantages and Disadvantages - Answer Formulations with a water-
soluble active ingredient dissolved in one or more liquid solvents.
Advantages and disadvantages vary depending on the solvents used or the concentration of the
active ingredient
, Advantages:
-Easy to store and transport
-Lower phytotoxicity than other liquid formulations
-Slower skin absorption than Emulsifiable Concentrates
Disadvantages:
-It's a dust, so hazardous to breathe in during mixing
What are Wettable Powders? Advantages and Disadvantages - Answer Dry, finely ground
formulations containing 25-80% active ingredient. Does not dissolve in water; applied as a
suspension.
Advantages:
-Easy to store and transport
-Lower phytotoxicity than other liquid formulations
-Slower skin absorption than Emulsifiable Concentrates
Disadvantages:
-It's a dust, so hazardous to breathe in during mixing
-Needs to be agitated constantly
-Clogs sprayers easy
What are Flowable Formulations? Advantages and Disadvantages - Answer Finely ground,
solid particles combined with active ingredient(s) and suspended in a liquid.
Advantages (Same as Wettable Powders):
-Easy to store and transport
-Less inhalation hazard than wettable powders
-Less agitation needed than wettable powders
Disadvantages:
-Difficult to mix in hard or alkaline water
Chapter 4 Questions Fully Solved.
What is an Active Ingredient? - Answer The component of a pesticide that controls the target
pest
What are Inert Ingredients? - Answer Additives that make a pesticide more effective, safer, or
easier to apply.
What are Pesticide Formulations? - Answer Mixtures of Active and Inert ingredients
What are Emulsifiable Concentrates? Advantages and Disadvantages - Answer They're liquid
formulations with the active ingredient dissolved in 1 or more petroleum solvents.
Advantages:
-Easy to handle and transport
-Little agitation required
-Non-abrasive to equipment
Disadvantages:
-May have high phytotoxicity
-May be flammable
-May be easily absorbed through skin
What is an Emulsion? Advantages and Disadvantages - Answer A mixture of 2 liquids that
aren't soluble to each other. One is suspended as very small droplets in the other with the aid of
an emulsifying agent. Ex.) oil in water
What are Solutions? Advantages and Disadvantages - Answer Formulations with a water-
soluble active ingredient dissolved in one or more liquid solvents.
Advantages and disadvantages vary depending on the solvents used or the concentration of the
active ingredient
, Advantages:
-Easy to store and transport
-Lower phytotoxicity than other liquid formulations
-Slower skin absorption than Emulsifiable Concentrates
Disadvantages:
-It's a dust, so hazardous to breathe in during mixing
What are Wettable Powders? Advantages and Disadvantages - Answer Dry, finely ground
formulations containing 25-80% active ingredient. Does not dissolve in water; applied as a
suspension.
Advantages:
-Easy to store and transport
-Lower phytotoxicity than other liquid formulations
-Slower skin absorption than Emulsifiable Concentrates
Disadvantages:
-It's a dust, so hazardous to breathe in during mixing
-Needs to be agitated constantly
-Clogs sprayers easy
What are Flowable Formulations? Advantages and Disadvantages - Answer Finely ground,
solid particles combined with active ingredient(s) and suspended in a liquid.
Advantages (Same as Wettable Powders):
-Easy to store and transport
-Less inhalation hazard than wettable powders
-Less agitation needed than wettable powders
Disadvantages:
-Difficult to mix in hard or alkaline water
