Waec Model Questions Vol1 2017 Agricultural Science Question 7

Practice essay / theory question 7 from the 2017 Waec Model Questions Vol1 Agricultural Science examination. This question covers Crop Pests .

Waec Model Questions Vol1 2017 Agricultural Science Essay / Theory
Topic: Crop Pests
Question 7 WAEC_MODEL_QUESTIONS_VOL1 • 2017 • AGRICULTURAL_SCIENCE • essay

A farmer in the savanna zone cultivates maize on a 2.5 ha field. The major pest observed is the stem borer (Busseola fusca). Each infested plant yields on average 0.4 kg less grain than a healthy plant. The field contains 30,000 maize plants. The farmer intends to use an organophosphate insecticide (dimethoate) that is to be applied at a rate of 1.5 L per hectare of a 0.025% (w/v) solution. The insecticide is sold in 500 mL bottles containing 20% (w/v) dimethoate and costs ₦1,200 per bottle.

Question Parts

( a )
Estimate the total potential loss in kilograms of grain if the pest is not controlled.
( b )
Determine the number of bottles required to treat the whole field at the recommended rate.
( c )
Calculate the total cost of the pesticide application.
( d )
Discuss two cultural, two biological and two chemical control methods for stem borer, and evaluate the advantages and disadvantages of integrating chemical control with at least one non‑chemical method in the context of sustainable agriculture.

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About This Question

This is Waec Model Questions Vol1 2017 Agricultural Science Question 7. It is one of the essay questions from the 2017 Waec Model Questions Vol1 Agricultural Science examination.

The question covers Crop Pests .

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

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