JAMB and WAEC Agricultural Science questions

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

1. Question 201· Crop pests and diseases· JAMB

   Cassava mosaic disease is spread by

   • Atermites
   • Bwhiteflies
   • Cbeetles
   • Dsnails

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   Explanation and discussion

2. Question 202· Crop pests and diseases· JAMB

   Pests with piercing and sucking mouthparts, such as aphids, are best controlled with

   • Asystemic insecticides
   • Bstomach poisons sprayed on leaves
   • Crat traps
   • Dhand picking only

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   Explanation and discussion

3. Question 203· Crop pests and diseases· WAEC

   The insect that spreads cassava mosaic disease is the

   • Awhitefly
   • Bstem borer
   • Cweevil
   • Dtermite

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   Explanation and discussion

4. Question 204· Crop pests and diseases· WAEC

   Weevils mainly damage

   • Astored grains
   • Bgrowing leaves
   • Croots of trees
   • Dfish

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   Explanation and discussion

5. Question 205· Crop pests and diseases· JAMB

   The cowpea weevil damages

   • Acowpea leaves only
   • Bstored cowpea seeds
   • Ccowpea roots
   • Dcowpea flowers only

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   Explanation and discussion

6. Question 206· Crop pests and diseases· WAEC

   Black pod disease of cocoa can be controlled by

   • Aflooding the farm
   • Bapplying urea
   • Cspraying copper fungicides and removing infected pods
   • Dspraying insecticide only

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   Explanation and discussion

7. Question 207· Crop pests and diseases· WAEC

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

   • Aa systemic insecticide
   • Ba stomach poison bait
   • Ca fungicide
   • Da herbicide

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   Explanation and discussion

8. Question 208· Crop pests and diseases· WAEC

   The stem borer damages maize by

   • Aspreading viruses only
   • Bsucking sap from leaves only
   • Ceating the roots only
   • Dtunnelling inside the stem

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   Explanation and discussion

9. Question 209· Crop pests and diseases· JAMB

   Groundnut rosette disease is transmitted by

   • Agrasshoppers
   • Bweevils
   • Ctermites
   • Daphids

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   Explanation and discussion

10. Question 210· Crop pests and diseases· WAEC

    Damping-off disease of seedlings is caused by

    • Aa virus
    • Ba fungus
    • Can insect
    • Da bird

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    Explanation and discussion

11. Question 211· Crop pests and diseases· JAMB

    Which of these is a typical sign of a viral disease in plants?

    • Aknots on roots
    • Bmottling (mosaic) of leaves
    • Cchewed leaves
    • Da white powdery coating

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    Explanation and discussion

12. Question 212· Crop pests and diseases· WAEC

    Using resistant varieties is a method of

    • Aharvesting
    • Bland clearing
    • Cdisease control
    • Dirrigation

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    Explanation and discussion

13. Question 213· Crop pests and diseases· WAEC

    Weevils are major pests of

    • Afish ponds
    • Bgrowing cassava leaves
    • Cstored grains
    • Drubber trees

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    Explanation and discussion

14. Question 214· Crop pests and diseases· WAEC

    Cassava mosaic disease is spread mainly by

    • Aweevils
    • Baphids
    • Clocusts
    • Dwhiteflies

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    Explanation and discussion

15. Question 215· Crop pests and diseases· JAMB

    Capsids (mirids) on cocoa damage the plant by

    • Asucking sap and causing cankers on stems and pods
    • Beating roots
    • Cboring timber
    • Drotting seeds

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    Explanation and discussion

16. Question 216· Crop pests and diseases· JAMB

    Maize streak virus is transmitted by

    • Alocusts
    • Bmealybugs
    • Cweevils
    • Dleafhoppers

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    Explanation and discussion

17. Question 217· Crop pests and diseases· JAMB

    Cassava mosaic disease is caused by a

    • Afungus
    • Bvirus
    • Cbacterium
    • Dnematode

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    Explanation and discussion

18. Question 218· Crop pests and diseases· WAEC

    Crop rotation helps to control soil-borne pests because

    • Athe pests lose their host crop
    • Bit adds pesticides
    • Cit waters the soil
    • Dit kills all insects

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19. Question 219· Crop pests and diseases· WAEC

    Stem borers damage maize mainly by

    • Atunnelling inside the stems
    • Bsucking sap from leaves only
    • Ceating the roots
    • Dspreading viruses

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    Explanation and discussion

20. Question 220· Crop pests and diseases· JAMB

    The cocoa capsid (mirid) damages cocoa by

    • Asucking sap from young shoots and pods
    • Bboring into the roots
    • Ceating leaves only
    • Dspreading mosaic virus

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    Explanation and discussion