I.Pale leaves II. Shrunken new leaves III. Water-soaked bark which peels off IV. Gum-like exudation from the cracks on the bark. Which of the following dise...

Assessment: WAEC SSCE - Agricultural Science - 1991 (Objective) Subject: Agricultural Science

Question 1 Report

I.Pale leaves II. Shrunken new leaves III. Water-soaked bark which peels off IV. Gum-like exudation from the cracks on the bark. Which of the following diseases of citrus has the symptoms listed above?
Answer Details
The symptoms listed above are indicative of the gummosis disease of citrus. Gummosis is a fungal disease that affects the bark of citrus trees, causing water-soaked bark that eventually peels off. The disease also leads to shrunken new leaves, and gum-like exudation from the cracks on the bark. Additionally, the leaves may turn pale due to reduced photosynthesis caused by the disease. The fungus that causes gummosis thrives in moist conditions, making it common in areas with high humidity or rainfall. Proper pruning, sanitation, and the use of fungicides can help to prevent and manage gummosis in citrus trees.

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