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Agricultural Science WAEC Past Questions

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461
A common disease of onion is
  • A. leaf spot
  • B. root knot
  • C. leaf blight
  • D. twister
  • E. mosaic
View Answer & Discuss WAEC 1996
462
Rice blast is caused by
  • A. a bacterium
  • B. a nematode
  • C. a virus
  • D. a fungus
  • E. an insect
View Answer & Discuss WAEC 1996
463
Which of the following diseases of crops is not caused by a fungus?
  • A. panama disease of banana
  • B. smut of rice
  • C. mould of stored grain
  • D. streak of maize
  • E. black pod isease of cocoa
View Answer & Discuss WAEC 1996
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464
Biological control of insect pests of crops can best be carried out through
  • A. crop rotation
  • B. use of parasites and predators
  • C. soil fumigation
  • D. farm sanitation
  • E. use of resistance varieties
View Answer & Discuss WAEC 1996
465
The aims of crop improvement include the following except
  • A. increasing yields
  • B. meeting particular needs of growers
  • C. meeting the needs of consumers
  • D. adapting to climatic conditions
  • E. reducing demand for a particular type of crop
View Answer & Discuss (1) WAEC 1996
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