Waec Model Questions Vol1 2024 Agricultural Science Question 9
Practice objective / multiple choice question 9 from the 2024 Waec Model Questions Vol1 Agricultural Science examination.
A maize field is infested with stem borer insects. The initial population is 200 insects per hectare and it grows exponentially at 25% per week. The economic threshold level (ETL) is 800 insects per hectare. A pesticide, applied only once at the end of a week, instantly reduces the population by 60% (i.e., leaves 40% of the insects). The farmer will apply the pesticide the first week the population would exceed the ETL if no control were used. After how many weeks from the start will the population first exceed the ETL?
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About This Question
This is Waec Model Questions Vol1 2024 Agricultural Science Question 9. It is one of the objective questions from the 2024 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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