WASHINGTON PESTICIDE LAWS AND
SAFETY TEST, PRACTICE EXAM
QUESTIONS AND ANSWERS GRADED A+
2026
A key to minimizing the hazard of pesticide use to the applicator is to avoid exposure (T/F) -
ANS True
The use of temperature or humidity manipulation is a ________ control method for insects -
ANS Physical
Drift problems can be reduced by:
a. using lower pressure, smaller nozzle orifices
b. applying in very calm, stable air conditions
c. spraying upwind of a sensitive area
d. placing bloom as close to target as possible - ANS d. placing a boom as close to the target
as possible
Which is not a concern handling a emulsifiable concentrate pesticide:
a. high phytotoxicity
b. may be easily absorbed through human and animal skin
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 1
,c. flammability
d. easily clogs nozzles and screens - ANS d. easily clogs nozzles and screens
EPA and WSDA are the only federal and state agencies that regulate pesticides (T/F) -
ANS False
Two or more pesticides that cannot mixed together effectively are said to be ______. -
ANS Incompatible
All formations with the same active ingredient carry the same signal word (T/F) - ANS False
The skull and crossbones symbol must appear on every pesticide label (T/F) - ANS False
The best way to dispose of a registered pesticide is to:
a. pour it into the sewer system
b. dump it in a vacant area
c. use it as direct on the label
d. ship it to the EPA - ANS c. use it as direct on the label
To minimize the drift when applying a herbicide, the best type of nozzle to use is:
a. a low pressure, flat fan
b. off center
c. a high pressure cone
d. makes no difference - ANS a. a low pressure, flat fan
Which LD50 is a representative of a highly toxic pesticide:
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 2
,a. 640 mg/kg
b. 5,800 mg/kg
c. 12,840 mg/kg
d. 46 mg/kg - ANS d. 46 mg/kg
Pesticide-contaminated surface water can contaminate groundwater (T/F) - ANS True
Pesticide records are useful only to applicators in case they have problems with effectiveness
(T/F) - ANS False
If an applicator had two major label violations and was cited by the WSDA, they could face a
maximum fine of $15,000 and lose their liscence (T/F) - ANS True
Dealers must keep records for 7 years on the sale of general use agricultural pesticides (T/F) -
ANS True
One of the earliest uses of chemicals as pesticides was the burning of sulfur (T/F) - ANS True
When the pest reaches the _____, pest management procedures need to be applied to prevent
the pest from economically damaging populations. - ANS Economic threshold
Which of the following is not considered a mechanical control method:
a. fencing a crop to prevent deer entry
b. netting blueberry bushes to keep birds away
c. releasing a parasitic wasp
d. washing of aphids with a stream of water
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 3
, e. removing a rhododendron with a root disease - ANS c. releasing a parasitic wasp
Which of the following is a cultural control method:
a. fertilization
b. planting time
c. pruning
d. crop rotation
e. all of the above - ANS e. all of the above
The first step in a pest management program is to identify the pest (T/F) - ANS True
The goal of a pest management program is to eliminate the pest (T/F) - ANS False
Pest control that involves the use of numerous tactics is called _____. - ANS Integrated Pest
Management
Which pesticide can be absorbed by the plant and translocated within the plant? -
ANS Systemic
Which was not a pre-1900s pesticide?
a. Bordeaux
b. nicotine
c. DDT
d. sulfur
e. lead arsenate - ANS c. DDT
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 4
SAFETY TEST, PRACTICE EXAM
QUESTIONS AND ANSWERS GRADED A+
2026
A key to minimizing the hazard of pesticide use to the applicator is to avoid exposure (T/F) -
ANS True
The use of temperature or humidity manipulation is a ________ control method for insects -
ANS Physical
Drift problems can be reduced by:
a. using lower pressure, smaller nozzle orifices
b. applying in very calm, stable air conditions
c. spraying upwind of a sensitive area
d. placing bloom as close to target as possible - ANS d. placing a boom as close to the target
as possible
Which is not a concern handling a emulsifiable concentrate pesticide:
a. high phytotoxicity
b. may be easily absorbed through human and animal skin
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 1
,c. flammability
d. easily clogs nozzles and screens - ANS d. easily clogs nozzles and screens
EPA and WSDA are the only federal and state agencies that regulate pesticides (T/F) -
ANS False
Two or more pesticides that cannot mixed together effectively are said to be ______. -
ANS Incompatible
All formations with the same active ingredient carry the same signal word (T/F) - ANS False
The skull and crossbones symbol must appear on every pesticide label (T/F) - ANS False
The best way to dispose of a registered pesticide is to:
a. pour it into the sewer system
b. dump it in a vacant area
c. use it as direct on the label
d. ship it to the EPA - ANS c. use it as direct on the label
To minimize the drift when applying a herbicide, the best type of nozzle to use is:
a. a low pressure, flat fan
b. off center
c. a high pressure cone
d. makes no difference - ANS a. a low pressure, flat fan
Which LD50 is a representative of a highly toxic pesticide:
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 2
,a. 640 mg/kg
b. 5,800 mg/kg
c. 12,840 mg/kg
d. 46 mg/kg - ANS d. 46 mg/kg
Pesticide-contaminated surface water can contaminate groundwater (T/F) - ANS True
Pesticide records are useful only to applicators in case they have problems with effectiveness
(T/F) - ANS False
If an applicator had two major label violations and was cited by the WSDA, they could face a
maximum fine of $15,000 and lose their liscence (T/F) - ANS True
Dealers must keep records for 7 years on the sale of general use agricultural pesticides (T/F) -
ANS True
One of the earliest uses of chemicals as pesticides was the burning of sulfur (T/F) - ANS True
When the pest reaches the _____, pest management procedures need to be applied to prevent
the pest from economically damaging populations. - ANS Economic threshold
Which of the following is not considered a mechanical control method:
a. fencing a crop to prevent deer entry
b. netting blueberry bushes to keep birds away
c. releasing a parasitic wasp
d. washing of aphids with a stream of water
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 3
, e. removing a rhododendron with a root disease - ANS c. releasing a parasitic wasp
Which of the following is a cultural control method:
a. fertilization
b. planting time
c. pruning
d. crop rotation
e. all of the above - ANS e. all of the above
The first step in a pest management program is to identify the pest (T/F) - ANS True
The goal of a pest management program is to eliminate the pest (T/F) - ANS False
Pest control that involves the use of numerous tactics is called _____. - ANS Integrated Pest
Management
Which pesticide can be absorbed by the plant and translocated within the plant? -
ANS Systemic
Which was not a pre-1900s pesticide?
a. Bordeaux
b. nicotine
c. DDT
d. sulfur
e. lead arsenate - ANS c. DDT
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 4
