Gce Model Questions Vol1 2020 Agricultural Science Question 48

Practice objective / multiple choice question 48 from the 2020 Gce Model Questions Vol1 Agricultural Science examination.

Gce Model Questions Vol1 2020 Agricultural Science Objective / Multiple Choice Medium Difficulty
Question 48 GCE_MODEL_QUESTIONS_VOL1 • 2020 • AGRICULTURAL_SCIENCE • objective

A leaf‑spot disease has a latent period of 7 days and an infectious period of 5 days. Each infected leaf produces 200 spores per day while infectious. At the start of a 14‑day period, 10,000 leaves are infected. (a) How many spores are produced in total during the 14 days if no control is applied? (b) If a fungicide is applied on day 8 that reduces spore production by 60 % for the remaining days, how many spores are produced and what is the reduction compared with (a)?

Answer Options

A. (a) 8,000,000 spores. (b) 2,800,000 spores after treatment, a reduction of 5,200,000 spores.
B. (a) 12,000,000 spores. (b) 5,000,000 spores after treatment, a reduction of 7,000,000 spores.
Correct Answer C. (a) 10,000,000 spores. (b) 4,000,000 spores after treatment, a reduction of 6,000,000 spores.
D. (a) 9,000,000 spores. (b) 3,600,000 spores after treatment, a reduction of 5,400,000 spores.
Correct Answer
C
Correct Option:
(a) 10,000,000 spores. (b) 4,000,000 spores after treatment, a reduction of 6,000,000 spores.

About This Question

This is Gce Model Questions Vol1 2020 Agricultural Science Question 48. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Agricultural Science examination.

Difficulty level: Medium .

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