IOWA 3OT PESTICIDE COMPREHENSIVE EXAM 2026
QUESTIONS AND SOLUTIONS RATED A+
✔✔Which of the following insecticides would be the best choice if all will adequately
control the target pest? - ✔✔One with the signal word "Caution"
✔✔Symptoms of dollar spot in Kentucky bluegrass include: - ✔✔Fluffy gray residue on
leaves
✔✔The following are characteristic of stem rust of Kentucky bluegrass: - ✔✔Produces
brick red pustules on leaf blades in late summer
✔✔The control of pink and gray snow mold involves: - ✔✔The construction of snow
barriers to minimize accumulation of snow in problem areas
✔✔Factors that contribute to pesticide phytotoxicity are: - ✔✔Uneven distribution of
pesticides
High air temperatures
Excessive application rates of pesticides
✔✔Which of the following list of weeds are winter annuals? - ✔✔Common chickweed,
henbit, field pennycress
✔✔Disease management in ornamentals can be improved by: - ✔✔Dormant pruning,
disease resistant varieties, bed rotation
✔✔The four basic weed control methods are: - ✔✔Cultural, chemical, mechanical,
biological
✔✔The presence of sod webworms in a turf area is relatively easy to determine by: -
✔✔Using a pyrethrum flushing agent to force the webworms to the surface
✔✔The minimum protective clothing for handling any formulation of pesticide with a
"caution" label is: - ✔✔Long-sleeved shirt and long pants, shoes
✔✔The chance for exposing humans, pets, non-target organisms and other sites during
equipment clean up can be reduced by: - ✔✔Cleaning equipment on an impervious
apron with retaining walls within a restricted area
✔✔Which of the following weed characteristics best describes yellow foxtail? -
✔✔Summer annual, grassy weed
✔✔The recommended method for controlling fire blight is: - ✔✔Dormant pruning and
antibiotic treatment at flowering
, ✔✔Control diplodia tip blight in pines by: - ✔✔Two bordeaux treatments in the spring
✔✔Cultural control of bagworms can be effective if the bags are removed and
destroyed by: - ✔✔Spraying the bags during the winter
✔✔Which type of herbicide application is most effective for annual grassy weeds? -
✔✔Spring preemergence
✔✔Spider mites damage conifers by: - ✔✔Sucking sap
✔✔Elm leaf beetles damage elm trees by: - ✔✔Feeding on the leaves
✔✔The best time to apply an insecticide to scale insects is in which stage of
development? - ✔✔Crawler
✔✔Leaf spot occurs during which of the following weather conditions? - ✔✔Cool, wet
weather
✔✔A practical technique to reduce potential drift damage to ornamental plants when
spraying turf for weed control is: - ✔✔Use a larger nozzle with low pressure
✔✔To reduce drift of pesticides: - ✔✔Keep nozzles close to the target pest or site
✔✔Which of the following turf herbicides is an example of a selective, translocated, and
post-emergence type? - ✔✔2,4-D
✔✔Which of the following statements best describe a sod webworm larva? - ✔✔Flesh
or gray color with small distinct black dots
✔✔Which of the following statements best describes an aphid? - ✔✔Multicolored, soft
bodied, sucks sap
✔✔Which formulation is most likely to cause phytotoxic injury? - ✔✔Emulsifiable
concentrate
✔✔Which of the following weeds is effectively controlled with post-emergence
herbicides in the fall? - ✔✔Dandelion
✔✔Which of the following are considered mechanical pest control methods? -
✔✔Mowing turf and wrapping tree trunks
✔✔You can identify prostrate spurge by the following: - ✔✔Prostrate growth
QUESTIONS AND SOLUTIONS RATED A+
✔✔Which of the following insecticides would be the best choice if all will adequately
control the target pest? - ✔✔One with the signal word "Caution"
✔✔Symptoms of dollar spot in Kentucky bluegrass include: - ✔✔Fluffy gray residue on
leaves
✔✔The following are characteristic of stem rust of Kentucky bluegrass: - ✔✔Produces
brick red pustules on leaf blades in late summer
✔✔The control of pink and gray snow mold involves: - ✔✔The construction of snow
barriers to minimize accumulation of snow in problem areas
✔✔Factors that contribute to pesticide phytotoxicity are: - ✔✔Uneven distribution of
pesticides
High air temperatures
Excessive application rates of pesticides
✔✔Which of the following list of weeds are winter annuals? - ✔✔Common chickweed,
henbit, field pennycress
✔✔Disease management in ornamentals can be improved by: - ✔✔Dormant pruning,
disease resistant varieties, bed rotation
✔✔The four basic weed control methods are: - ✔✔Cultural, chemical, mechanical,
biological
✔✔The presence of sod webworms in a turf area is relatively easy to determine by: -
✔✔Using a pyrethrum flushing agent to force the webworms to the surface
✔✔The minimum protective clothing for handling any formulation of pesticide with a
"caution" label is: - ✔✔Long-sleeved shirt and long pants, shoes
✔✔The chance for exposing humans, pets, non-target organisms and other sites during
equipment clean up can be reduced by: - ✔✔Cleaning equipment on an impervious
apron with retaining walls within a restricted area
✔✔Which of the following weed characteristics best describes yellow foxtail? -
✔✔Summer annual, grassy weed
✔✔The recommended method for controlling fire blight is: - ✔✔Dormant pruning and
antibiotic treatment at flowering
, ✔✔Control diplodia tip blight in pines by: - ✔✔Two bordeaux treatments in the spring
✔✔Cultural control of bagworms can be effective if the bags are removed and
destroyed by: - ✔✔Spraying the bags during the winter
✔✔Which type of herbicide application is most effective for annual grassy weeds? -
✔✔Spring preemergence
✔✔Spider mites damage conifers by: - ✔✔Sucking sap
✔✔Elm leaf beetles damage elm trees by: - ✔✔Feeding on the leaves
✔✔The best time to apply an insecticide to scale insects is in which stage of
development? - ✔✔Crawler
✔✔Leaf spot occurs during which of the following weather conditions? - ✔✔Cool, wet
weather
✔✔A practical technique to reduce potential drift damage to ornamental plants when
spraying turf for weed control is: - ✔✔Use a larger nozzle with low pressure
✔✔To reduce drift of pesticides: - ✔✔Keep nozzles close to the target pest or site
✔✔Which of the following turf herbicides is an example of a selective, translocated, and
post-emergence type? - ✔✔2,4-D
✔✔Which of the following statements best describe a sod webworm larva? - ✔✔Flesh
or gray color with small distinct black dots
✔✔Which of the following statements best describes an aphid? - ✔✔Multicolored, soft
bodied, sucks sap
✔✔Which formulation is most likely to cause phytotoxic injury? - ✔✔Emulsifiable
concentrate
✔✔Which of the following weeds is effectively controlled with post-emergence
herbicides in the fall? - ✔✔Dandelion
✔✔Which of the following are considered mechanical pest control methods? -
✔✔Mowing turf and wrapping tree trunks
✔✔You can identify prostrate spurge by the following: - ✔✔Prostrate growth
