Waec Model Questions Vol1 2022 Agricultural Science Question 17
Practice objective / multiple choice question 17 from the 2022 Waec Model Questions Vol1 Agricultural Science examination.
An infestation of fall armyworm in a maize field starts with 150 larvae ha⁻¹. The population grows exponentially at 15 % per day. The economic injury level (EIL) is 500 larvae ha⁻¹. A pesticide applied on any day costs ₦8,000 and instantly reduces the existing larvae by 70 %. After each application the remaining larvae continue to grow at the same 15 % daily rate. The farmer has a total pest‑control budget of ₦24,000. (a) On which latest day must the farmer first apply the pesticide to keep the population from ever exceeding the EIL? (b) Assuming the farmer follows the optimal schedule, can the required number of applications be afforded within the budget? Answer with the day number and "yes" or "no".
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About This Question
This is Waec Model Questions Vol1 2022 Agricultural Science Question 17. It is one of the objective questions from the 2022 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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