Ohio Pesticide Certification – CORE Study Guide
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. Pesticides that are listed as 1.5 EC and 90 DF contain:
a. 1.5 lbs. per gallon and .9 lb. of active ingredient per pound of product
b. 1.5 gallons and 90 lbs of active ingredient
c. 1.5 pints and 9 quarts of active ingredients
d. 1.5 qts. and 90 ounces of active ingredient - Correct Answer: A.
The label will tell you the amount of active ingredient present in the
pesticide product. Depending upon the product, the active ingredient
can be expressed in many ways. For example, 50 WP means 1 lb. of
material contains 1/2 lb. of active ingredient, a 4E means there are 4
lbs. of active ingredient per gallon, and a 60 percent dispersible
granule contains 6/10 lb. of active ingredient in 1 lb.
2. You have decided to apply a combination of Doubt 8E and Lancer 1.5E to
your soybeans this year. If the recommended rates are 2 lbs. active
ingredient for Doubt and 0.125 lb. active ingredient for Lancer per acre,
how much material is needed to be added to the spray tank to spray one
acre?
a. Doubt 1 qt., Lancer 1 pt.
b. Doubt 1/2 pt., Lancer 1/2 pt.
c. Doubt 2 pts., Lancer 1/2 pt.
d. Doubt 1 qt., Lancer 2/3 pt. - Correct Answer: D. Remember the
following formula: E/G = amount of material per acre; (Where E =
, pounds of active ingredient per acre and G = pounds of active
ingredient per gallon.) For Doubt, 2/8 = 1/4 gallon or 1 qt. material
per acre. For Lancer .125/1.5 = .0833. .0833 X 128 ox./gallon = 10.67
oz. 10.67 oz./16oz = 2/3 pt. Lancer per acre.
3. A farmer has a 5000-gallon tank and is applying pesticide at 20 gallons per
acre (GPA). He wants to apply Lancer 2E at 1 lb. active ingredient per acre
and Doubt 25DF at .25 lb. active ingredient per acre. How much of these
two materials should be added to the spray tank for a 20-acre application?
a. 40 pts. Lancer and 2 lbs. Doubt
b. 10 gallons Lancer and 20 lbs. Doubt
c. 20 gallons Lancer and 20 lbs. Doubt
d. 2 qts. Lancer and 1 lb. Doubt - Correct Answer: B. To obtain the
gallons of Lancer needed per acre, use Formula E/G. (Where E = lbs.
of active ingredients recommended per acre, and G = lbs. active
ingredient per gallon.) Therefore, the recommendation of 1 lb. of
Lancer per acre which itself has 2 lbs. active ingredient per gallon
equals E/G, or 1 divided by 2. Therefore 1/2 = 1/2 gallon Lancer per
acre, 1/2 gallon X 20 acres = 10 gallons of Lancer in the tank. For
Doubt, use the formula E/F (Where E = lbs. active ingredient
recommended per acre and F = percent active ingredient in the
product). Therefore, .25/.25 = 1 lb. of Doubt per acre and 20 lbs. of
Doubt would be put in the the spray tank for a 20-acre application
4. Before the process of calibration can begin, what factor(s) must be
considered?
a. The pest to be controlled and the pesticide chosen
b. Where the pest will be
c. The type of equipment
d. Weather conditions
, e. All of the above - Correct Answer: E. Before undertaking to
calibrate your sprayer, it is helpful and important to analyze the pest
to be controlled, the pesticide selected to control the pest, the
equipment's ability to deliver the pesticide to the target area, the
weather conditions, the location of the pest, and the risks and
benefits involved with the pesticide application
5. What benefits are obtained from calibration of your spray equipment?
a. Illegal pesticide residues
b. Injury to plants and animals
c. Excessive run-off
d. Lawsuits and fines
e. None of the above - Correct Answer: E. Calibration is the process
of adjusting your equipment so that the desired amount of pesticide
is applied to the target. Correct calibration is essential to prevent
drift, overdosing, excessive runoff, lawsuits and fines. Additionally,
calibration is essential along with pesticide selection, adjuvant
selection, timing, etc. in the control of the target pest
6. In calibrating your sprayer after spraying 1/8 acre, you poured 4 1/8 gallons
of water back to refill your 100 gallon tank. How many gallons of spray
solution are you spraying?
a. 24 GPA
b. 31 GPA
c. 33 GPA
d. 43 GPA - Correct Answer: C. Since you sprayed 1/8 of an acre and
used 4 1/8 gallons of solution, you should have sprayed 33 gallons
per acre. (4 1/8)/(1/8) = (33/8) X (8/1) = 33 GPA
, 7. If you are spraying more gallons per acre than is recommended or desired,
how can you change the output?
a. Change the tractor speed
b. Change pressure
c. Change nozzles
d. All of the above - Correct Answer: D. Tractor speed, pump
pressure and nozzle size all affect actual output per acre. Generally, if
you are going at the desired speed and are using recommended
pump pressure, the best way to change output is to change nozzles.
8. If a farmer has a 500-gallon spray tank and his sprayer is calibrated to apply
20 gallons per acre (GPA), how many acres can the farmer spray with one
full tank?
a. 10
b. 25
c. 20
d. 30 - Correct Answer: B. A farmer can apply material to 25 acres.
(500-gallon tank/20 gallon/acre) = 25 acres per tank
9. The pesticide label will often give recommendations for the correct amount
of spray volume, but the applicator must also consider:
a. Size of the spray tank
b. Availability and cost of the carrier
c. Surface to be treated (hairy or dense foliage, porous surface)
d. a, b, and c
e. a and c - Correct Answer: D. The pesticide label is the best source
of information for the appropriate spray volume. Often there are a
number of different volumes that can be used. Depending on the
type of pesticide used, the efficacy of the control can be influenced
significantly by volume, carrier, and adjuvant.
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. Pesticides that are listed as 1.5 EC and 90 DF contain:
a. 1.5 lbs. per gallon and .9 lb. of active ingredient per pound of product
b. 1.5 gallons and 90 lbs of active ingredient
c. 1.5 pints and 9 quarts of active ingredients
d. 1.5 qts. and 90 ounces of active ingredient - Correct Answer: A.
The label will tell you the amount of active ingredient present in the
pesticide product. Depending upon the product, the active ingredient
can be expressed in many ways. For example, 50 WP means 1 lb. of
material contains 1/2 lb. of active ingredient, a 4E means there are 4
lbs. of active ingredient per gallon, and a 60 percent dispersible
granule contains 6/10 lb. of active ingredient in 1 lb.
2. You have decided to apply a combination of Doubt 8E and Lancer 1.5E to
your soybeans this year. If the recommended rates are 2 lbs. active
ingredient for Doubt and 0.125 lb. active ingredient for Lancer per acre,
how much material is needed to be added to the spray tank to spray one
acre?
a. Doubt 1 qt., Lancer 1 pt.
b. Doubt 1/2 pt., Lancer 1/2 pt.
c. Doubt 2 pts., Lancer 1/2 pt.
d. Doubt 1 qt., Lancer 2/3 pt. - Correct Answer: D. Remember the
following formula: E/G = amount of material per acre; (Where E =
, pounds of active ingredient per acre and G = pounds of active
ingredient per gallon.) For Doubt, 2/8 = 1/4 gallon or 1 qt. material
per acre. For Lancer .125/1.5 = .0833. .0833 X 128 ox./gallon = 10.67
oz. 10.67 oz./16oz = 2/3 pt. Lancer per acre.
3. A farmer has a 5000-gallon tank and is applying pesticide at 20 gallons per
acre (GPA). He wants to apply Lancer 2E at 1 lb. active ingredient per acre
and Doubt 25DF at .25 lb. active ingredient per acre. How much of these
two materials should be added to the spray tank for a 20-acre application?
a. 40 pts. Lancer and 2 lbs. Doubt
b. 10 gallons Lancer and 20 lbs. Doubt
c. 20 gallons Lancer and 20 lbs. Doubt
d. 2 qts. Lancer and 1 lb. Doubt - Correct Answer: B. To obtain the
gallons of Lancer needed per acre, use Formula E/G. (Where E = lbs.
of active ingredients recommended per acre, and G = lbs. active
ingredient per gallon.) Therefore, the recommendation of 1 lb. of
Lancer per acre which itself has 2 lbs. active ingredient per gallon
equals E/G, or 1 divided by 2. Therefore 1/2 = 1/2 gallon Lancer per
acre, 1/2 gallon X 20 acres = 10 gallons of Lancer in the tank. For
Doubt, use the formula E/F (Where E = lbs. active ingredient
recommended per acre and F = percent active ingredient in the
product). Therefore, .25/.25 = 1 lb. of Doubt per acre and 20 lbs. of
Doubt would be put in the the spray tank for a 20-acre application
4. Before the process of calibration can begin, what factor(s) must be
considered?
a. The pest to be controlled and the pesticide chosen
b. Where the pest will be
c. The type of equipment
d. Weather conditions
, e. All of the above - Correct Answer: E. Before undertaking to
calibrate your sprayer, it is helpful and important to analyze the pest
to be controlled, the pesticide selected to control the pest, the
equipment's ability to deliver the pesticide to the target area, the
weather conditions, the location of the pest, and the risks and
benefits involved with the pesticide application
5. What benefits are obtained from calibration of your spray equipment?
a. Illegal pesticide residues
b. Injury to plants and animals
c. Excessive run-off
d. Lawsuits and fines
e. None of the above - Correct Answer: E. Calibration is the process
of adjusting your equipment so that the desired amount of pesticide
is applied to the target. Correct calibration is essential to prevent
drift, overdosing, excessive runoff, lawsuits and fines. Additionally,
calibration is essential along with pesticide selection, adjuvant
selection, timing, etc. in the control of the target pest
6. In calibrating your sprayer after spraying 1/8 acre, you poured 4 1/8 gallons
of water back to refill your 100 gallon tank. How many gallons of spray
solution are you spraying?
a. 24 GPA
b. 31 GPA
c. 33 GPA
d. 43 GPA - Correct Answer: C. Since you sprayed 1/8 of an acre and
used 4 1/8 gallons of solution, you should have sprayed 33 gallons
per acre. (4 1/8)/(1/8) = (33/8) X (8/1) = 33 GPA
, 7. If you are spraying more gallons per acre than is recommended or desired,
how can you change the output?
a. Change the tractor speed
b. Change pressure
c. Change nozzles
d. All of the above - Correct Answer: D. Tractor speed, pump
pressure and nozzle size all affect actual output per acre. Generally, if
you are going at the desired speed and are using recommended
pump pressure, the best way to change output is to change nozzles.
8. If a farmer has a 500-gallon spray tank and his sprayer is calibrated to apply
20 gallons per acre (GPA), how many acres can the farmer spray with one
full tank?
a. 10
b. 25
c. 20
d. 30 - Correct Answer: B. A farmer can apply material to 25 acres.
(500-gallon tank/20 gallon/acre) = 25 acres per tank
9. The pesticide label will often give recommendations for the correct amount
of spray volume, but the applicator must also consider:
a. Size of the spray tank
b. Availability and cost of the carrier
c. Surface to be treated (hairy or dense foliage, porous surface)
d. a, b, and c
e. a and c - Correct Answer: D. The pesticide label is the best source
of information for the appropriate spray volume. Often there are a
number of different volumes that can be used. Depending on the
type of pesticide used, the efficacy of the control can be influenced
significantly by volume, carrier, and adjuvant.
