Which disease, whose causal agent has not been discovered, makes the crowns of Heritiera fomes (sundri) trees die back in the Sundarbans?
Answer and explanation
Correct answer: D. Top-dying disease
- Step 1: Top-dying disease affects Heritiera fomes (sundri), which makes up about 63 percent of the trees in the Sundarbans, causing dieback from the crown; it states that no causal agent has been discovered. Answer: Top-dying disease. Why not the others: Root rot blight, Dutch elm disease and Black knot fungus don't fit.
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More The Sundarbans Mangrove Ecosystem and Marine Geography questions
- Approximately what percentage of the Sundarbans mangrove forest lies within Bangladesh?
- In which year was the Bangladesh section of the Sundarbans inscribed as a UNESCO World Heritage Site?
- Which mangrove tree species gives its name to the Sundarbans and constitutes the predominant canopy timber?
- What specialized respiratory root structures allow mangrove trees in the waterlogged Sundarbans mud to breathe atmospheric oxygen?
- Which palm species growing along tidal creek banks in the Sundarbans is widely harvested by local communities for roofing thatch?
- What traditional occupational group enters the deep Sundarbans forest seasonally to collect wild mangrove honey and beeswax?