Gce Model Questions Vol1 2017 Agricultural Science Question 8

Practice essay / theory question 8 from the 2017 Gce Model Questions Vol1 Agricultural Science examination. This question covers Plant Diseases .

Gce Model Questions Vol1 2017 Agricultural Science Essay / Theory
Topic: Plant Diseases
Question 8 GCE_MODEL_QUESTIONS_VOL1 • 2017 • AGRICULTURAL_SCIENCE • essay

During the rainy season, a 1‑ha tomato farm in the savanna zone showed irregularly shaped, water‑soaked lesions on lower leaves, later developing into brown, sunken spots on fruits. The farmer recorded the following disease incidence data from five equal 0.2‑ha plots:

Question Parts

( a )
Identify the disease and the causal organism. Describe the disease cycle, emphasizing the role of environmental conditions in its spread.
( b )
Based on the incidence data below, calculate the overall disease incidence for the farm and estimate the potential economic loss, assuming: - Average marketable yield without disease = 30 t ha⁻¹ - Each 1 % increase in disease incidence reduces yield by 0.15 t. - Market price of tomatoes = ₦120 000 t⁻¹. Incidence data (percentage of plants showing symptoms): Plot 1 – 12 %, Plot 2 – 18 %, Plot 3 – 9 %, Plot 4 – 15 %, Plot 5 – 6 %. Then, recommend a comprehensive disease‑management strategy integrating cultural, chemical, and resistant‑variety measures.

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About This Question

This is Gce Model Questions Vol1 2017 Agricultural Science Question 8. It is one of the essay questions from the 2017 Gce Model Questions Vol1 Agricultural Science examination.

The question covers Plant Diseases .

View More Gce Model Questions Vol1 2017 Agricultural Science Questions More Gce Model Questions Vol1 Practice Questions Back to Questions

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