All Free Agriculture MCQs with Answers
Every Agriculture question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
2,315 questions · page 87 of 116
- A. Cultural control
- B. Biological control
- C. Physical control
- D. Natural control
Explanation: Biological control uses living agents such as predators, parasitoids and disease-causing organisms to reduce pest numbers below the…
Correct answer: Biological control- A. Natural control
- B. Mechanical control
- C. Cultural controlOrder DNA Kits
- D. Physical control
Explanation: Cultural control changes farming practices or the crop environment, such as crop rotation, sanitation and adjusted planting dates, to make…
Correct answer: Cultural controlOrder DNA Kits- A. Artificial control
- B. Physical control
- C. Cultural control
- D. Natural control
Explanation: Natural control is the combined effect of environmental factors, including weather, predators, parasites and diseases, that keep pest…
Correct answer: Natural control- A. Minor pest
- B. Major pest
- C. Key pest
- D. Migrant pestDownload Nature Guides
Explanation: A minor pest causes only slight or insignificant damage under normal conditions.
Correct answer: Minor pest- A. Key pest
- B. Secondary pest
- C. Occasional pest
- D. Migrant pest
Explanation: A key pest is regularly associated with a crop and reaches damaging levels during the growing season, causing economic loss.
Correct answer: Key pest- A. Key pest
- B. Secondary pest
- C. Occasional pest
- D. Migrant pest
Explanation: A secondary pest is normally minor but becomes economically important after conditions such as indiscriminate insecticide use disturb…
Correct answer: Secondary pest- A. None of the AboveTake Economics Courses
- B. Economic threshold level
- C. Economic damage
- D. Economic injury level
Explanation: The economic injury level is the smallest pest population that actually causes economic loss.
Correct answer: Economic injury level- A. Economic pest
- B. Pest
- C. Insect pest
- D. Sub economic pest
Explanation: An economic pest causes measurable loss in crop quantity or quality, making the damage calculable in economic terms.
Correct answer: Economic pest- A. IPM
- B. Pest outbreak
- C. Pest resurgence
- D. IPC
Explanation: A pest outbreak is a rapid, explosive increase in the population of a particular species over a short period.
Correct answer: Pest outbreak- A. Integrated pest management
- B. Integrated insect pest management
- C. Integrated pest control
- D. Pest resource
Explanation: Integrated pest control combines two or more compatible control methods in a planned programme while excluding chemical control in this…
Correct answer: Integrated pest control- A. Tropical region
- B. Sub tropical
- C. temperature region
- D. None of the above
Explanation: Insects are generally most abundant and diverse in tropical regions because warm temperatures and long growing seasons support continuous…
Correct answer: Tropical region- A. Warm blooded animals
- B. Cold blooded animals
- C. Grasshopper
- D. None of the above
Explanation: Insects are ectothermic, traditionally called cold-blooded, because their body temperature depends largely on environmental temperature.
Correct answer: Cold blooded animals- A. Fly
- B. May or may not fly
- C. Never flown
- D. non of these
Explanation: Adult fleas are wingless insects, so they move mainly by jumping and do not fly.
Correct answer: Never flown- A. Silver fish
- B. Fireflies
- C. Locust
- D. Cicadas
Explanation: Male cicadas produce loud, ear-splitting calls with specialized structures called tymbals to attract females.
Correct answer: Cicadas- A. May be a non reproductive male or non reproductive female
- B. A non reproductive male
- C. A non reproductive female
- D. None of above
Explanation: Termite workers are sterile adults and may develop as either males or females, so they are non-reproductive members of both sexes.
Correct answer: May be a non reproductive male or non reproductive female- A. Flies
- B. Fleas
- C. Beetles
- D. Wasps
Explanation: Fireflies are beetles belonging mainly to the family Lampyridae, although their soft bodies and luminous organs make them look unlike…
Correct answer: Beetles1737. Type of pheromone which get together the insects for food and mating is known as________________?
- A. Alarm pheromone
- B. Trial marking pheromone
- C. Sex pheromone
- D. Aggregation pheromone
Explanation: Aggregation pheromones attract both sexes or groups of the same insect species to a common site for feeding, shelter, or mating.
Correct answer: Aggregation pheromone- A. Honeybees
- B. Termites
- C. Black ants
- D. None of the above
Explanation: Honeybees are highly social insects because they live in colonies with distinct castes, division of labour and coordinated brood care.
Correct answer: Honeybees- A. Chemical which prevent feeding
- B. Prevent feeding and oviposition of an insect
- C. Prevent ovipositon of an insect
- D. None of the above
Explanation: A deterrent is a chemical or plant trait that discourages insect feeding, egg-laying, or both.
Correct answer: Prevent feeding and oviposition of an insect- A. Horizantal resistance
- B. Specific resistance
- C. General resistance
- D. Cross resistance
Explanation: Cross-resistance occurs when resistance to one insecticide also gives resistance to another insecticide with a similar mode of action or…
Correct answer: Cross resistance