Neco Model Questions Vol1 2019 Agricultural Science Question 42

Practice objective / multiple choice question 42 from the 2019 Neco Model Questions Vol1 Agricultural Science examination.

Neco Model Questions Vol1 2019 Agricultural Science Objective / Multiple Choice Medium Difficulty
Question 42 NECO_MODEL_QUESTIONS_VOL1 • 2019 • AGRICULTURAL_SCIENCE • objective

A farmer has 2 ha of maize. Each armyworm larva causes an estimated loss of \(\N\)30 in yield. A biopesticide that kills 80 % of larvae costs \(\N\)150 per litre and is applied at a rate of 2 litres per ha; each litre covers 0.5 ha. Determine the minimum larval density (larvae per m²) at which applying the biopesticide becomes economically justified, and state the total cost of treating the whole 2‑ha field.

Answer Options

A. Minimum density ≈ 0.0010 larvae\/m²; total cost = \(\N\)450
Correct Answer B. Minimum density ≈ 0.0013 larvae/m²; total cost = \(\N\)600
C. Minimum density ≈ 0.0020 larvae\/m²; total cost = \(\N\)900
D. Minimum density ≈ 0.0015 larvae\/m²; total cost = \(\N\)750
Correct Answer
B
Correct Option:
Minimum density ≈ 0.0013 larvae/m²; total cost = \(\N\)600

About This Question

This is Neco Model Questions Vol1 2019 Agricultural Science Question 42. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Agricultural Science examination.

Difficulty level: Medium .

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