TEXAS PESTICIDE APPLICATOR EXAM
REVIEW QUESTIONS WITH ACCURATE
SOLUTIONS 2026
▶ ___________ effects occur at the site of contact with a pesticide while
___________ effects occur away from the point of contact.. Answer: Local,
systemic
▶ Skin rash, nausea, eye irritation, and dizziness are examples of
___________ toxic effects.. Answer: Reversible
▶ LD 50 means "lethal dose fifty" it refers to the amount of chemical that
kills __________ the animals exposed to it in a laboratory test.. Answer:
half (50%)
▶ The smaller the LD 50 value, the less chemical required to fatal, so the
more poisonous the pesticide. T/F. Answer: True
▶ Acute oral toxicity and acute dermal toxicity are measured as LD 50. The
higher the LD 50 the ___________ (more or less) toxic the pesticide..
Answer: Less
▶ How is LD 50 used?
a. LD 50 is used with other tests to place pesticides in a " toxic category"
and give them a "signal word."
b. LD 50 is used to compare the toxicity of different chemicals.
c. LD 50 is used to tell how a chemical acts and how sensitive different
organs within an animal or human might be.. Answer: a. LD 50 is used with
other tests to place pesticides in a " toxic category" and give them a "signal
word."
▶ LC 50 means "lethal _________ fifty." It refers to the amount of chemical
in the air that caused half of the test animals to die when they inhaled it..
Answer: Concentration
,▶ Six milligrams per kilogram (mg/kg) is equal to __________ parts per
million.. Answer: six
▶ What signal word must be on the label for pesticides classified as
"relatively non-toxic"
a. CAUTION!
b. DANGER!
c. WARNING!. Answer: a. CAUTION!
▶ What signal word must be on the label for pesticides classified as "Highly
toxic"?
a. CAUTION!
b. DANGER!
c. WARNING!. Answer: b. DANGER!
▶ What signal word must be on the label for pesticides classified as
"Slightly toxic"?
a. CAUTION!
b. DANGER!
c. WARNING!. Answer: a. CAUTION!
▶ What signal word must be on the label for pesticides classified as
"moderately toxic"?
a. CAUTION
b. DANGER
c. WARNING. Answer: c. WARNING
▶ The toxicity of a substance is its ability to cause injury, while
__________ is the risk or chance that harm will come from using the
pesticide.. Answer: hazard
▶ Is a highly toxic material always very hazardous?
a. No, if a highly toxic material is handled properly it could actually pose low
risk or hazard.
b. Yes, no matter how it is handled a highly toxic material is always
hazardous.. Answer: a. No, if a highly toxic material is handled properly it
could actually pose low risk or hazard.
▶ Which of the statements below is not true about a pesticide deposit?
, a. A deposit is pesticide that remains on treated surfaces right after
application.
b. Pesticide deposits may or may not be seen easily.
c. Most deposits remain on surfaces for a very long time.. Answer: c. Most
deposits remain on surfaces for a very long time.
▶ Which of the statements below is not true about a pesticide residue?
a. Some residues may remain for months or years.
b. Residue information is required for each crop you treat.
c. residues are found only on target crops and surfaces.. Answer:
Residues are found only on target crops and surfaces.
▶ A __________ is the maximum amount of pesticide residue allowed on a
harvested crop, set by the EPA.. Answer: Tolerance
▶ Can a harvested crop contain more than the set tolerance of a pesticide
and still be legally sold?
a. No, it cannot be legally sold
b. Yes, it may be sold if it is not condemned or seized.
c. Yes, it may be sold if it is identified as contaminated.. Answer: No, it
cannot be legally sold.
▶ What margin of safety ("safety factor") does the EPA use to set
tolerances?
a. 10 times
b. 100 times
c. 1,000 times. Answer: b. 100 times
▶ Food may have no residues at all because the residues may have
degraded or the crop may have been treated with a minimum dose of a
pesticide. T/F. Answer: True
▶ Soil and plant surfaces may contain pesticide residue even when they
are not directly sprayed with the pesticide. T/F. Answer: True
▶ EPA sets two kinds of tolerances: __________ __________ tolerances
for pesticides that indirectly contact food; and tolerances for pesticides
applied directly for food.. Answer: Negligible residue, finite
REVIEW QUESTIONS WITH ACCURATE
SOLUTIONS 2026
▶ ___________ effects occur at the site of contact with a pesticide while
___________ effects occur away from the point of contact.. Answer: Local,
systemic
▶ Skin rash, nausea, eye irritation, and dizziness are examples of
___________ toxic effects.. Answer: Reversible
▶ LD 50 means "lethal dose fifty" it refers to the amount of chemical that
kills __________ the animals exposed to it in a laboratory test.. Answer:
half (50%)
▶ The smaller the LD 50 value, the less chemical required to fatal, so the
more poisonous the pesticide. T/F. Answer: True
▶ Acute oral toxicity and acute dermal toxicity are measured as LD 50. The
higher the LD 50 the ___________ (more or less) toxic the pesticide..
Answer: Less
▶ How is LD 50 used?
a. LD 50 is used with other tests to place pesticides in a " toxic category"
and give them a "signal word."
b. LD 50 is used to compare the toxicity of different chemicals.
c. LD 50 is used to tell how a chemical acts and how sensitive different
organs within an animal or human might be.. Answer: a. LD 50 is used with
other tests to place pesticides in a " toxic category" and give them a "signal
word."
▶ LC 50 means "lethal _________ fifty." It refers to the amount of chemical
in the air that caused half of the test animals to die when they inhaled it..
Answer: Concentration
,▶ Six milligrams per kilogram (mg/kg) is equal to __________ parts per
million.. Answer: six
▶ What signal word must be on the label for pesticides classified as
"relatively non-toxic"
a. CAUTION!
b. DANGER!
c. WARNING!. Answer: a. CAUTION!
▶ What signal word must be on the label for pesticides classified as "Highly
toxic"?
a. CAUTION!
b. DANGER!
c. WARNING!. Answer: b. DANGER!
▶ What signal word must be on the label for pesticides classified as
"Slightly toxic"?
a. CAUTION!
b. DANGER!
c. WARNING!. Answer: a. CAUTION!
▶ What signal word must be on the label for pesticides classified as
"moderately toxic"?
a. CAUTION
b. DANGER
c. WARNING. Answer: c. WARNING
▶ The toxicity of a substance is its ability to cause injury, while
__________ is the risk or chance that harm will come from using the
pesticide.. Answer: hazard
▶ Is a highly toxic material always very hazardous?
a. No, if a highly toxic material is handled properly it could actually pose low
risk or hazard.
b. Yes, no matter how it is handled a highly toxic material is always
hazardous.. Answer: a. No, if a highly toxic material is handled properly it
could actually pose low risk or hazard.
▶ Which of the statements below is not true about a pesticide deposit?
, a. A deposit is pesticide that remains on treated surfaces right after
application.
b. Pesticide deposits may or may not be seen easily.
c. Most deposits remain on surfaces for a very long time.. Answer: c. Most
deposits remain on surfaces for a very long time.
▶ Which of the statements below is not true about a pesticide residue?
a. Some residues may remain for months or years.
b. Residue information is required for each crop you treat.
c. residues are found only on target crops and surfaces.. Answer:
Residues are found only on target crops and surfaces.
▶ A __________ is the maximum amount of pesticide residue allowed on a
harvested crop, set by the EPA.. Answer: Tolerance
▶ Can a harvested crop contain more than the set tolerance of a pesticide
and still be legally sold?
a. No, it cannot be legally sold
b. Yes, it may be sold if it is not condemned or seized.
c. Yes, it may be sold if it is identified as contaminated.. Answer: No, it
cannot be legally sold.
▶ What margin of safety ("safety factor") does the EPA use to set
tolerances?
a. 10 times
b. 100 times
c. 1,000 times. Answer: b. 100 times
▶ Food may have no residues at all because the residues may have
degraded or the crop may have been treated with a minimum dose of a
pesticide. T/F. Answer: True
▶ Soil and plant surfaces may contain pesticide residue even when they
are not directly sprayed with the pesticide. T/F. Answer: True
▶ EPA sets two kinds of tolerances: __________ __________ tolerances
for pesticides that indirectly contact food; and tolerances for pesticides
applied directly for food.. Answer: Negligible residue, finite
