Neco Model Questions Vol1 2019 Agricultural Science Question 7

Practice essay / theory question 7 from the 2019 Neco Model Questions Vol1 Agricultural Science examination. This question covers Crop Pests .

Neco Model Questions Vol1 2019 Agricultural Science Essay / Theory

Topic: Crop Pests

Question 7 NECO_MODEL_QUESTIONS_VOL1 • 2019 • AGRICULTURAL_SCIENCE • essay

A farmer in the Sudan savanna region of Nigeria cultivates maize on a 5‑hectare field. The farmer reports severe damage caused by an insect pest that has a rapid life cycle and attacks the whorl and young leaves. Recent surveys indicate that the pest is the Fall armyworm (Spodoptera frugiperda).

Question Parts

( a )

List three major insect pests of maize in Nigeria and, for each, briefly describe its life cycle stages that are responsible for crop damage.

( b )

For the Fall armyworm, develop an Integrated Pest Management (IPM) strategy that includes (i) cultural control, (ii) biological control, and (iii) chemical control. Justify the choice of any pesticide, considering its toxicity class and the risk of resistance development.

( c )

Using the data below, calculate the Economic Injury Level (EIL) for Fall armyworm on this maize farm and state the threshold number of larvae per hectare at which control should be applied. - Average grain loss caused by one larva = 0.20 kg ha⁻¹ - Market price of maize grain = ₦150 per kg - Cost of control (pesticide + application) = ₦500 per ha - Proportion of damage prevented by the chosen pesticide (K) = 0.90

Detailed Solution & Marking Scheme

Get the step-by-step solution, key points required by examiners and detailed marking guidance through the Edcrib AI Tutor.

Reveal Answer

About This Question

This is Neco Model Questions Vol1 2019 Agricultural Science Question 7. It is one of the essay questions from the 2019 Neco Model Questions Vol1 Agricultural Science examination.

The question covers Crop Pests .

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

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows

Chat with Support