IDAHO PESTICIDE APPLICATOR EXAM ACTUAL EXAM
Weed management Strategies - ANSWER: o mechanical - tillage, mowing, flooding.
o cultural - rotation, competition.
o Biological - bugs
o chemical - herbicides
Growth Regulator Herbicides - ANSWER: Selective, Translocate
Example: 2,4-D
Amino Acid Synthesis Inhibitors - ANSWER: non-selective, translocate
Example: Arsenal, Roundup
Lipid Inhibitor - ANSWER: Selective, translocate, interfere with new hand growth
Seedling Growth Inhibitors - ANSWER: prevent root or shoot development on
seedling
Photosynthesis Inhibitors - ANSWER: Interfere with photosynthesis
Example: Spike
Cell Membrane Disruptors - ANSWER: Contact herbicides
Example: Gramoxone
Pigment Inhibitors - ANSWER: Interfere with photosynthesis
Herbicide Application in Annual Life Cycle - ANSWER: Seeding and vegetative
Herbicide Application in Biennial Life Cycle - ANSWER: Seeding and Rosette
Herbicide Application in Perennial Life Cycle - ANSWER: Seeding, bud, early flower,
full flower, fall regrowth
Herbicide Tolerance and Resistance - ANSWER: o Tolerance - when a plant has
historically survived a particular herbicide action
o Susceptibility - when a plant is killed by herbicide action
o Resistance - when a plant has evolved mechanism to survive a particular
herbicide action.
Minimizing Herbicide Resistance - ANSWER: o Tolerance - when a plant has
historically survived a particular herbicide action
o Susceptibility - when a plant is killed by herbicide action
o Resistance - when a plant has evolved mechanism to survive a particular
herbicide action.
, 2,4-D - ANSWER: Selective, growth regulator, high volatility, high potential for drift,
peas, grapes, and tomatoes very sensitive, grain and corn are not sensitive
Soil Residual Herbicides - ANSWER: Last from several weeks to several years, LTR's
(long-term residual herbicides) kill most vegetation and leave soil nonproductive
from one to several years
Nozzle types - ANSWER: Solid stream, fan, cone
Nozzle materials: Carbide and Ceramic - ANSWER: Most expensive, most resistant
to abrasion and corrosion
Nozzle materials: Stainless steel - ANSWER: good resistance to abraision and
corrosion, moderately priced
Nozzle Materials: Brass - ANSWER: resist corrosion but not abrasion
Nozzle materials: Aluminum - ANSWER: inexpensive, resist some corrosion, wear
quickly
Nozzle materials: Plastic - ANSWER: Swell when exposed to organic solvents
Changing pressure with nozzle sprayers - ANSWER: increasing pressure does not
give a proportional increase in output, so adjust pressure for minor changes in
spray delivery rate
Change in travel speed with sprayers - ANSWER: inversely proportional to speed of
sprayer: 2x sprayer ground speed reduces amount of spray by 1/2
Making large changes in sprayer applications - ANSWER: adjusting the size of the
opening (nozzle tip) to increase or restrict flow
Applying Granular herbicides - ANSWER: speed inversely proportional to amount of
material- more speed= less material/ size of opening. larger opening= more
granules
Federal Insecticide, Fungicide and Rodenticide Act (FIFRA) - ANSWER: Overseen by
US EPA
Pesticide Registration - ANSWER: EPA registers the product and it's uses
Special Product Registration - ANSWER: - Section 3 registration: registration of
pesticide product through US EPA
- Section 8 registration: Emergency Exemption
- Section 24 (c) registration- special local needs (SLN) registration
Weed management Strategies - ANSWER: o mechanical - tillage, mowing, flooding.
o cultural - rotation, competition.
o Biological - bugs
o chemical - herbicides
Growth Regulator Herbicides - ANSWER: Selective, Translocate
Example: 2,4-D
Amino Acid Synthesis Inhibitors - ANSWER: non-selective, translocate
Example: Arsenal, Roundup
Lipid Inhibitor - ANSWER: Selective, translocate, interfere with new hand growth
Seedling Growth Inhibitors - ANSWER: prevent root or shoot development on
seedling
Photosynthesis Inhibitors - ANSWER: Interfere with photosynthesis
Example: Spike
Cell Membrane Disruptors - ANSWER: Contact herbicides
Example: Gramoxone
Pigment Inhibitors - ANSWER: Interfere with photosynthesis
Herbicide Application in Annual Life Cycle - ANSWER: Seeding and vegetative
Herbicide Application in Biennial Life Cycle - ANSWER: Seeding and Rosette
Herbicide Application in Perennial Life Cycle - ANSWER: Seeding, bud, early flower,
full flower, fall regrowth
Herbicide Tolerance and Resistance - ANSWER: o Tolerance - when a plant has
historically survived a particular herbicide action
o Susceptibility - when a plant is killed by herbicide action
o Resistance - when a plant has evolved mechanism to survive a particular
herbicide action.
Minimizing Herbicide Resistance - ANSWER: o Tolerance - when a plant has
historically survived a particular herbicide action
o Susceptibility - when a plant is killed by herbicide action
o Resistance - when a plant has evolved mechanism to survive a particular
herbicide action.
, 2,4-D - ANSWER: Selective, growth regulator, high volatility, high potential for drift,
peas, grapes, and tomatoes very sensitive, grain and corn are not sensitive
Soil Residual Herbicides - ANSWER: Last from several weeks to several years, LTR's
(long-term residual herbicides) kill most vegetation and leave soil nonproductive
from one to several years
Nozzle types - ANSWER: Solid stream, fan, cone
Nozzle materials: Carbide and Ceramic - ANSWER: Most expensive, most resistant
to abrasion and corrosion
Nozzle materials: Stainless steel - ANSWER: good resistance to abraision and
corrosion, moderately priced
Nozzle Materials: Brass - ANSWER: resist corrosion but not abrasion
Nozzle materials: Aluminum - ANSWER: inexpensive, resist some corrosion, wear
quickly
Nozzle materials: Plastic - ANSWER: Swell when exposed to organic solvents
Changing pressure with nozzle sprayers - ANSWER: increasing pressure does not
give a proportional increase in output, so adjust pressure for minor changes in
spray delivery rate
Change in travel speed with sprayers - ANSWER: inversely proportional to speed of
sprayer: 2x sprayer ground speed reduces amount of spray by 1/2
Making large changes in sprayer applications - ANSWER: adjusting the size of the
opening (nozzle tip) to increase or restrict flow
Applying Granular herbicides - ANSWER: speed inversely proportional to amount of
material- more speed= less material/ size of opening. larger opening= more
granules
Federal Insecticide, Fungicide and Rodenticide Act (FIFRA) - ANSWER: Overseen by
US EPA
Pesticide Registration - ANSWER: EPA registers the product and it's uses
Special Product Registration - ANSWER: - Section 3 registration: registration of
pesticide product through US EPA
- Section 8 registration: Emergency Exemption
- Section 24 (c) registration- special local needs (SLN) registration
