WAEC Agricultural Science 2025 Objective — Question 24

Question 24 of 50 from the West African Examinations Council (WAEC) Agricultural Science 2025 Objective paper, with the correct answer and a full explanation.

Blackarm disease of crop affects

A. cottonCorrect
B. citrus
C. yam
D. plantain

Explanation

Blackarm is a serious bacterial infection that affects cotton plants. It manifests as dark, sunken lesions on stems and branches, weakening the plant structure. Affected branches may snap under wind or weight, reducing yield and fibre quality.

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