Gce Model Questions Vol1 2025 Agricultural Science Question 7

Practice essay / theory question 7 from the 2025 Gce Model Questions Vol1 Agricultural Science examination. This question covers Crop Pests .

Gce Model Questions Vol1 2025 Agricultural Science Essay / Theory
Topic: Crop Pests
Question 7 GCE_MODEL_QUESTIONS_VOL1 • 2025 • AGRICULTURAL_SCIENCE • essay

A farmer in the northern region of Nigeria cultivates maize on a 2‑hectare field. During the early rainy season, the farmer observes extensive leaf shredding and whorl damage. Laboratory scouting reports indicate the presence of two insect pests that are known to attack maize in this zone.

Question Parts

( a )
Identify two major insect pests that commonly affect maize in the northern region of Nigeria and describe the key stages of their life cycles that are relevant to field damage.
( b )
Initial scouting counted 2 000 individuals of the dominant pest per hectare. The population multiplies by a factor of 1.8 each week. The economic threshold for action is 5 000 individuals per hectare. Calculate after how many whole weeks the pest population will exceed the economic threshold on a per‑hectare basis.
( c )
Recommend an integrated pest management (IPM) plan for the farmer. In your answer include: (i) one cultural control measure, (ii) one biological control agent, (iii) a chemical control option. For the chemical control, the recommended pesticide is to be applied at 2.5 L of a 0.05 % active‑ingredient (AI) solution per hectare. The cost of the ready‑to‑use solution is ₦120 per litre and pure AI costs ₦15 per millilitre. Calculate the total volume of solution, the total volume of pure AI required for the whole 2‑ha field, and the total cost of the chemical control.

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About This Question

This is Gce Model Questions Vol1 2025 Agricultural Science Question 7. It is one of the essay questions from the 2025 Gce Model Questions Vol1 Agricultural Science examination.

The question covers Crop Pests .

View More Gce Model Questions Vol1 2025 Agricultural Science Questions More Gce Model Questions Vol1 Practice Questions Back to Questions

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