Waec Model Questions Vol1 2021 Agricultural Science Question 8

Practice essay / theory question 8 from the 2021 Waec Model Questions Vol1 Agricultural Science examination. This question covers Plant Diseases, Epidemiology, Disease Management .

Waec Model Questions Vol1 2021 Agricultural Science Essay / Theory
Topics: Plant Diseases Epidemiology Disease Management
Question 8 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • AGRICULTURAL_SCIENCE • essay

A smallholder in the South‑West region cultivates cassava and has observed a progressive increase in leaf symptoms over the past five years.

Question Parts

( a )
Identify the causal organism of Cassava Mosaic Disease (CMD) and describe its primary mode of transmission in the field.
( b )
The recorded incidence of CMD in the farmer’s field over five consecutive years is: Year 1 = 12 %, Year 2 = 15 %, Year 3 = 19 %, Year 4 = 24 %, Year 5 = 30 %. Calculate the average annual increase in incidence and predict the expected incidence for Year 6 if the same trend continues.
( c )
Propose an integrated disease management plan for CMD in this cassava farm. For each component (cultural, biological, chemical, and use of resistant varieties) give a brief justification of how it reduces disease spread or severity.

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About This Question

This is Waec Model Questions Vol1 2021 Agricultural Science Question 8. It is one of the essay questions from the 2021 Waec Model Questions Vol1 Agricultural Science examination.

The question covers Plant Diseases, Epidemiology, Disease Management .

View More Waec Model Questions Vol1 2021 Agricultural Science Questions More Waec Model Questions Vol1 Practice Questions Back to Questions

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