Neco Model Questions Vol1 2022 Agricultural Science Question 2
Practice objective / multiple choice question 2 from the 2022 Neco Model Questions Vol1 Agricultural Science examination.
A 2‑ha maize field is being surveyed for stem borer damage. The economic threshold is 5 % of plants showing symptoms. From a random sample of 200 plants, 12 are damaged.\n(i) State whether chemical control is justified.\n(ii) If control is justified, the recommended spray rate is 1.5 L ha⁻¹ of a formulation containing 250 g a.i. L⁻¹. Because of reported resistance, the farmer must apply a mixture of pesticide A and pesticide B in the volume ratio 3:2, while keeping the total volume at the recommended rate. Calculate the volume of each pesticide to be applied per hectare.
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This is Neco Model Questions Vol1 2022 Agricultural Science Question 2. It is one of the objective questions from the 2022 Neco Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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