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WAEC Agricultural Science questions: Crop pests and diseases

19 questions with answers and explanations. Tap an option to check yourself.

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All topicsAgricultural economics and extension · 19Animal pests and diseases · 18Animal reproduction and nutrition · 18Classification and anatomy of farm animals · 18Crop classification and propagation · 18Crop pests and diseases · 19Farm tools and mechanisation · 18Fisheries and aquaculture · 18Forestry · 18Husbandry of field crops · 19Irrigation and drainage · 18Livestock management · 18Meaning and importance of agriculture · 17Soil fertility, manures and fertilisers · 19Soil formation and properties · 18Weeds and weed control · 18

  1. Question 1· Crop pests and diseases· WAEC

    A pest is any organism that

    Explanation and discussion

  2. Question 2· Crop pests and diseases· WAEC

    Cassava leaves that are mottled yellow-green, twisted and stunted show signs of

    Explanation and discussion

  3. Question 3· Crop pests and diseases· WAEC

    Biological control of pests involves

    Explanation and discussion

  4. Question 4· Crop pests and diseases· WAEC

    Cocoa pods that turn brown-black and rot during wet weather show signs of

    Explanation and discussion

  5. Question 5· Crop pests and diseases· WAEC

    The cassava mealybug was controlled in Nigeria largely by

    Explanation and discussion

  6. Question 6· Crop pests and diseases· WAEC

    The insect that spreads cassava mosaic disease is the

    Explanation and discussion

  7. Question 7· Crop pests and diseases· WAEC

    Weevils mainly damage

    Explanation and discussion

  8. Question 8· Crop pests and diseases· WAEC

    Black pod disease of cocoa can be controlled by

    Explanation and discussion

  9. Question 9· Crop pests and diseases· WAEC

    Aphids, which have piercing and sucking mouthparts, are best controlled with

    Explanation and discussion

  10. Question 10· Crop pests and diseases· WAEC

    The stem borer damages maize by

    Explanation and discussion

  11. Question 11· Crop pests and diseases· WAEC

    Damping-off disease of seedlings is caused by

    Explanation and discussion

  12. Question 12· Crop pests and diseases· WAEC

    Using resistant varieties is a method of

    Explanation and discussion

  13. Question 13· Crop pests and diseases· WAEC

    Weevils are major pests of

    Explanation and discussion

  14. Question 14· Crop pests and diseases· WAEC

    Cassava mosaic disease is spread mainly by

    Explanation and discussion

  15. Question 15· Crop pests and diseases· WAEC

    Crop rotation helps to control soil-borne pests because

    Explanation and discussion

  16. Question 16· Crop pests and diseases· WAEC

    Stem borers damage maize mainly by

    Explanation and discussion

  17. Question 17· Crop pests and diseases· WAEC

    Insects with piercing and sucking mouthparts include

    Explanation and discussion

  18. Question 18· Crop pests and diseases· WAEC

    Rosette disease of groundnut is spread by

    Explanation and discussion

  19. Question 19· Crop pests and diseases· WAEC

    The variegated grasshopper damages crops by

    Explanation and discussion

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