WAEC Agricultural Science 2022 Objective — Question 33

Question 33 of 50 from the West African Examinations Council (WAEC) Agricultural Science 2022 Objective paper, with the correct answer and a full explanation.

Use the information below to answer question 33. I. Yellowing of leaves II. Raised brown spots on the leaves III. Drying up of leaves IV. Exudation of gum The disease of citrus described above is

A. die-backCorrect
B. gummosis
C. tristeza
D. blight

Explanation

The symptoms described (yellowing, raised brown spots, drying leaves, gum exudation) are characteristic of die-back disease of citrus, caused by a Phytophthora pathogen.

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