Waec Model Questions Vol1 2017 Agricultural Science Question 9
Practice objective / multiple choice question 9 from the 2017 Waec Model Questions Vol1 Agricultural Science examination.
During a field survey of a maize farm, 200 plants were inspected. Thirty plants showed symptoms of leaf blight. Of these, 12 plants had severe lesions covering more than 50 % of the leaf area, while the remaining 18 plants had moderate lesions (severity score 50). The disease incidence is defined as (number of diseased plants ÷ total inspected) × 100. The disease severity index is calculated as (sum of severity scores ÷ (number of diseased plants × 100)) × 100. Determine the disease incidence (in %) and the disease severity index (in %).
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About This Question
This is Waec Model Questions Vol1 2017 Agricultural Science Question 9. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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