Neco Model Questions Vol1 2019 Agricultural Science Question 8

Practice essay / theory question 8 from the 2019 Neco Model Questions Vol1 Agricultural Science examination. This question covers Plant Diseases .

Neco Model Questions Vol1 2019 Agricultural Science Essay / Theory
Topic: Plant Diseases
Question 8 NECO_MODEL_QUESTIONS_VOL1 • 2019 • AGRICULTURAL_SCIENCE • essay

A smallholder in the rainforest zone of Nigeria cultivates tomatoes. After a rainy spell, the farmer notices circular brown lesions with concentric rings on the lower leaves of several plants.

Question Parts

( a )
From a survey of 200 tomato plants, 45 plants show typical symptoms. Out of a total of 1 200 leaves examined, 180 leaves are diseased. Calculate (i) the disease incidence (%) and (ii) the disease severity index (%).
( b )
Identify the most probable disease causing the described symptoms and name its causal organism.
( c )
Propose an integrated disease management plan for this disease, covering (i) cultural, (ii) resistant varieties, and (iii) chemical control. Explain why rotating with a non‑host crop helps reduce inoculum levels.

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About This Question

This is Neco Model Questions Vol1 2019 Agricultural Science Question 8. It is one of the essay questions from the 2019 Neco Model Questions Vol1 Agricultural Science examination.

The question covers Plant Diseases .

View More Neco Model Questions Vol1 2019 Agricultural Science Questions More Neco Model Questions Vol1 Practice Questions Back to Questions

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