Waec Model Questions Vol1 2020 Agricultural Science Question 8

Practice essay / theory question 8 from the 2020 Waec Model Questions Vol1 Agricultural Science examination. This question covers Plant Diseases .

Waec Model Questions Vol1 2020 Agricultural Science Essay / Theory

Topic: Plant Diseases

Question 8 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • AGRICULTURAL_SCIENCE • essay

A farmer growing tomatoes in the humid zone of southern Nigeria notices that the lower leaves of several plants turn yellow, brown lesions appear on the lower stems and the plants wilt early in the season. Affected plants also show a water‑soaked spot on the fruit that later becomes a large, sunken rot. The farmer wants to know the cause of the disease and how to manage it effectively.

Question Parts

( a )

Identify the disease and name the causal organism, giving its classification (e.g., fungus, bacterium, virus).

( b )

Explain the disease cycle and describe the environmental conditions that favour its spread.

( c )

Evaluate two cultural and two chemical control methods, highlighting the advantages and disadvantages of each for a small‑scale farmer.

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About This Question

This is Waec Model Questions Vol1 2020 Agricultural Science Question 8. It is one of the essay questions from the 2020 Waec Model Questions Vol1 Agricultural Science examination.

The question covers Plant Diseases .

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