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These 10 free ND-PEST questions are organized by exam domain, so you can see how each part of the North Dakota Commercial Pesticide Applicator Ground Core Exam blueprint is tested. Reveal the answer and explanation under each question.
Thirty-six hours after a pesticide application, a crew arrives to hand-harvest the crop. The hypothetical product label specifies a 12-hour restricted-entry interval and a 7-day preharvest interval. All other worker-entry requirements have been satisfied. The crew leader asks what work is permitted. Which instruction is correct?
Correct answer: C - Nonharvest work may resume; harvesting must wait until the preharvest interval ends.
An appropriately certified applicator identifies a damaging insect in an ornamental planting. A pesticide registered in North Dakota lists the planting site but not that insect. Its labeling neither prohibits the target nor limits use to listed pests. Reliable information confirms efficacy, and all other use requirements can be met. What is the correct interpretation of the missing pest name?
Correct answer: C - The unlisted pest may be treated while following the site's labeled directions.
Comparable acute oral studies in the same test species give Product X an LD50 of 240 mg/kg and Product Y an LD50 of 2,400 mg/kg. Both product labels display DANGER. Which conclusion is justified without additional exposure information?
Correct answer: B - Product X is more acutely toxic by ingestion than Product Y.
Pesticide concentrate splashes into an applicator's eye at a mixing pad. Clean running water is within reach, and a coworker is already calling Poison Control. Which action should begin immediately rather than wait for product identification?
Correct answer: D - Flush the eye gently with water while holding the eyelids open.
Just before sunrise, an applicator measures 52°F near the soil and 60°F at a height of 10 feet. Wind is light, and dust from a passing vehicle hangs in a thin layer instead of dispersing upward. How should these observations affect the planned spray application?
Correct answer: A - Postpone; an inversion can keep fine droplets suspended near the ground.
A site's integrated pest management plan sets an action threshold of 8 larvae per plant and an economic injury level of 12. Representative samples now average 9 larvae per plant, and counts are rising. Natural enemies are not containing the infestation. An available labeled control works against the current larval stage but needs time to take effect. What is the soundest management decision?
Correct answer: B - Initiate the effective control now and continue monitoring.
Before preparing a permitted tank mixture, an applicator conducts a jar test using the intended water source, product proportions, and mixing order. The mixture remains uniform during the prescribed observation period, with no clumps, gel, or separation. This result establishes that:
Correct answer: A - The mixture is physically compatible under the conditions tested.
After a broadcast herbicide treatment, narrow strips of living weeds recur at the same position within each boom pass. The same species and growth stage were controlled between strips. A clean-water check finds one correctly sized nozzle delivering 0.20 gallon per minute while the others deliver the specified 0.40. What is the best-supported cause of the failed control?
Correct answer: D - A partial blockage at the low-output nozzle or strainer.
A uniform 36-acre field has rows spaced 30 inches apart. An applicator will treat a 10-inch band over every row in one pass. The hypothetical label specifies 2 pints of formulated product per acre actually treated, not per field acre. How many U.S. gallons of product are needed for the entire field?
Correct answer: B - 3 gallons
A North Dakota commercial applicator completes a general-use herbicide treatment for a customer who has signed a letter waiving receipt of the application record. Which recordkeeping duty remains?
Correct answer: D - Complete the application record within 24 hours and retain it for 3 years.
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