JAMB Agricultural Science questions

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

1. Question 101· Crop pests and diseases· JAMB

   Locusts damage crops by

   • Asucking sap
   • Beating leaves and stems
   • Cboring into roots
   • Dspreading viruses only

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2. Question 102· Crop pests and diseases· JAMB

   The swollen shoot disease of cocoa is spread by

   • Atermites
   • Baphids
   • Cweevils
   • Dmealybugs

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3. Question 103· Crop pests and diseases· JAMB

   Fumigation is used mainly to control

   • Afish diseases
   • Bweeds in the field
   • Cpests of stored produce
   • Dsoil acidity

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4. Question 104· Crop pests and diseases· JAMB

   Which of these is a cultural method of pest control?

   • ACrop rotation
   • BSpraying insecticides
   • CIntroducing natural predators
   • DFumigation

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5. Question 105· Crop pests and diseases· JAMB

   Cassava mosaic disease is spread by

   • Atermites
   • Bwhiteflies
   • Cbeetles
   • Dsnails

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6. Question 106· 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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7. Question 107· Crop pests and diseases· JAMB

   The cowpea weevil damages

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

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8. Question 108· Crop pests and diseases· JAMB

   Groundnut rosette disease is transmitted by

   • Agrasshoppers
   • Bweevils
   • Ctermites
   • Daphids

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9. Question 109· 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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10. Question 110· 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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11. Question 111· Crop pests and diseases· JAMB

    Maize streak virus is transmitted by

    • Alocusts
    • Bmealybugs
    • Cweevils
    • Dleafhoppers

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12. Question 112· Crop pests and diseases· JAMB

    Cassava mosaic disease is caused by a

    • Afungus
    • Bvirus
    • Cbacterium
    • Dnematode

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13. Question 113· 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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14. Question 114· Crop pests and diseases· JAMB

    Black pod disease of cocoa is caused by a

    • Avirus
    • Bfungus
    • Cbacterium
    • Dmite

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15. Question 115· Crop pests and diseases· JAMB

    The insect pest that bores into the stems of maize is the

    • Aaphid
    • Bweevil
    • Cstem borer
    • Dtermite

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16. Question 116· Crop pests and diseases· JAMB

    Root-knot nematodes cause

    • Aswellings (galls) on roots
    • Bleaf mosaic
    • Cpod rot
    • Dstem boring

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17. Question 117· Crop pests and diseases· JAMB

    Integrated pest management combines

    • Aseveral control methods to keep pests below damaging levels
    • Bonly chemical sprays
    • Conly biological control
    • Dno control

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18. Question 118· Crop pests and diseases· JAMB

    Grains in storage are mostly damaged by

    • Aweevils
    • Btsetse flies
    • Cticks
    • Dmosquitoes

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19. Question 119· Crop pests and diseases· JAMB

    Copper-based fungicides are sprayed on cocoa farms mainly to control

    • Ablack pod disease
    • Bcapsids
    • Cswollen shoot virus
    • Dweeds

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20. Question 120· Farm tools and mechanisation· JAMB

    A hand trowel is used mainly for

    • Atransplanting seedlings
    • Bfelling trees
    • Cspraying chemicals
    • Dharvesting tubers

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