pg. 1 Tennessee Ornamental and Turfgrass Pest Control Category
- Exam Prep 400 Practice Questions and Correct Answers/
TN Cat 3 Exam Prep 2025-2026/ Tennessee Category 3 Commercial Pesticide Applicator Exam Prep (newest)
The classic symptom of this disease in closely mowed turf is a "smoke ring" of grayish mycelium on the edge of brown, dead patches of grass.
- brown patch
- fairy rings
- dollar spot
- powdery mildew
- brown patch
Powdery mildew growth is enhanced by:
- high temps and high relative humidity
- proper fertilization and wet foliage
- insect feeding
- cool nighttime temps., high relative humidity and lush plant growth.
- cool nighttime temps., high relative humidity and lush plant growth.
White growth on leaves and misshapen flowers are symptoms of:
- powdery mildew
- anthracnose
- fireblight
- phomopsis blight
- powdery mildew
A certified applicator must attend at least one meeting per year for certification points. - ANSWER-False
Tennessee Commercial Pesticide Applicators must keep records of the use of both restricted-use and general-use pesticides - ANSWER-True
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pg. 2 It is unlawful to detach, alter, deface or destroy a label or labeling. It is also unlawful to dispose or store pesticides in a manner that would cause injury to man or the environment. These practices are essential in carrying out which law? -
ANSWER-TIFRA
For 1 gallon of dilution, mix 5 ounces of concentrate. How many ounces of concentrate would you use to make a 1/2 gallon of use dilution? - ANSWER-2.5 oz
When stopping a pesticide application for any reason, which of the following is not true? - ANSWER-Depressurizaion may not be necessary with low volumes
Control of non-native pests that relies on a natural enemy that not native to a geographical area is called _____ ( a type of applied control) - ANSWER- Biological control
The most probable cause for frequent snake sightings in a particular area is: -
ANSWER-The local rodent population is large enough to serve as an abundant source of food for the snakes.
Spotting of the leaves of flowers is caused by: - ANSWER-Feeding by the four-
lined bug
The lethal dose required to kill 50% of a test population of animals in laboratory experiments is represented by which of the following - ANSWER-LD50 & LC50
Earthworms are beneficial because: - ANSWER-They enhance soil structure and
fertility
When should fungicides be applied to prevent leaf galls?
- in early fall 2 / 4
pg. 3
- at bud break
- when spores appear on galls
- any time of year
- at bud break
All of the following are cultural management techniques for fungal diseases
except:
- removing and destroying diseased plant parts
- using disease-resistant cultivars
- preventative bactericide applications
- proper irrigation
- preventative bactericide applications
Galls on cedar and leaf spots on apple are caused by:
- nematodes
- rust disease
- vascular wilt
- a virus
- rust disease
If Devrinol 50-DF Ornamental is swallowed, immediately induce vomiting and call a poison control center. - ANSWER-False
Devrinol 50-DF Ornamental can be used by homeowners on container-grown ornamentals, ground covers and turfgrass - ANSWER-True
A grass herbicide application failed to control an unusual-looking plant with yellow-green triangular stems and tubers. Which of the following is the most likely cause for the failure? - ANSWER-The weed is yellow nutsedge which is not a grass
Devrinol 50-DF Ornamental may be used as a tank mix combination with Betasan 4E Herbicide for crabgrass control in Bermudagrass and Fescue. - ANSWER-True
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pg. 4 Devrinol 50-DF Ornamentals controls germinating and established weeds - ANSWER-False Which of the following is not a true pathogen of turfgrass?
- white patch
- dollar patch
- stripe smut
- slime mold
- slime mold
Small, straw-colored patches no greater than 3 inches in diameter indicate which of
the following diseases:
- fusarium patch
- brown patch
- spring dead spot
- dollar spot
- dollar spot
- aerating the soil
- removing thatch
- maintaining proper soil moisture
- extra fertilization
- extra fertilization
Which of the following does not prevent or reduce the severity of fairy rings?
This disease occurs in cold, wet weather usually developing under snow or leaf
cover:
- powdery mildew
- red thread
- Fusarium patch
- slime mold
- Fusarium patch
This disease produces small, purple-to-reddish-brown circular lesions on grass
blades that may enlarge and girdle the leaf:
- red thread
- Helminthosporium
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