#1
Which of the following is not a common formulation of pesticides?
Isotopes
ExplanationIsotopes are not a common formulation of pesticides; formulations typically include active ingredients, adjuvants, and inert ingredients.
#2
Which of the following factors can influence pesticide degradation?
Temperature and humidity
ExplanationTemperature and humidity influence pesticide degradation, affecting its stability and persistence in the environment.
#3
Which pesticide application method is typically used for controlling pests in the soil?
Seed treatment
ExplanationSeed treatment is a common method for controlling soil pests, protecting seeds and seedlings.
#4
Which of the following is a symptom of acute pesticide poisoning in humans?
Nausea and vomiting
ExplanationNausea and vomiting are common symptoms of acute pesticide poisoning in humans, indicating exposure to toxic levels.
#5
What is the primary purpose of pesticide label instructions?
To guide safe and effective pesticide use
ExplanationPesticide label instructions guide users in the safe and effective use of the product, including dosage, application, and safety precautions.
#6
What does the LD50 value of a pesticide indicate?
Its acute toxicity
ExplanationThe LD50 value of a pesticide indicates the dose at which 50% of test animals exhibit acute toxicity; lower LD50 values indicate higher toxicity.
#7
Which organization regulates the safety of pesticides in the United States?
EPA (Environmental Protection Agency)
ExplanationThe EPA regulates pesticide safety in the United States, ensuring products meet safety and environmental standards.
#8
Which type of pesticide application method is most likely to result in drift?
Aerial spraying
ExplanationAerial spraying is prone to drift, causing pesticides to be carried away from the target area by wind.
#9
What is the primary function of surfactants in pesticide formulations?
To enhance wetting and spreading
ExplanationSurfactants in pesticide formulations improve wetting and spreading, ensuring better coverage on target surfaces.
#10
What is the purpose of inert ingredients in pesticide formulations?
To dilute the active ingredient
ExplanationInert ingredients in pesticide formulations serve to dilute the active ingredient and improve the product's handling and stability.
#11
What does the term 'pre-harvest interval' refer to in pesticide application?
The time between pesticide application and crop harvest
ExplanationThe pre-harvest interval is the time required between pesticide application and the safe harvest of crops.
#12
What is the purpose of adjuvants in pesticide formulations?
To increase pesticide effectiveness
ExplanationAdjuvants enhance pesticide effectiveness by improving spreading, wetting, or sticking to target surfaces.
#13
What does the signal word 'Danger' on a pesticide label indicate?
The pesticide is highly toxic
Explanation'Danger' on a label indicates the pesticide is highly toxic, posing a significant risk to human health.
#14
Which of the following pesticide application methods is least likely to cause environmental contamination?
Seed treatment
ExplanationSeed treatment is less likely to cause environmental contamination as it targets pests in the soil during planting.
#15
What is the primary concern regarding pesticide resistance?
Decreased effectiveness of pesticides
ExplanationPesticide resistance leads to decreased effectiveness, requiring alternative control methods to manage resistant pests.
#16
What is the primary concern associated with pesticide residues in food?
Chronic toxicity to consumers
ExplanationPesticide residues in food pose a concern for chronic toxicity to consumers over prolonged exposure.
#17
What is the primary reason for rotating pesticide modes of action?
To prevent the development of pesticide resistance
ExplanationRotating pesticide modes of action helps prevent the development of resistance in pest populations, maintaining effectiveness.