Neco 2021 Agricultural Science Question 20
Practice objective / multiple choice question 20 from the 2021 Neco Agricultural Science examination.
A farmer can use two pesticides against a pest: pesticide A kills 90 % of the pest population on first use, but each consecutive use of A reduces its efficacy by 5 % absolute (e.g., 90 % → 85 % → 80 %). Pesticide B always kills 80 % and does not induce resistance. The farmer may apply only one pesticide per season and wants the average control efficacy over three consecutive seasons to be at least 85 %. (a) Propose a sequence of pesticide applications (e.g., A, B, A) that meets the requirement. (b) Compute the average efficacy of your proposed sequence.
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About This Question
This is Neco 2021 Agricultural Science Question 20. It is one of the objective questions from the 2021 Neco Agricultural Science examination.
Difficulty level: Medium .
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