The most common disease of rubber plant in South America was

Leaf blight disease

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Red rot disease

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Tobacco mosaic disease

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None of the above

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Solution

The correct option is A Leaf blight disease
A- South American leaf blight (SALB) is a fungal disease affecting rubber trees. It is caused by the ascomycete Microcyclus ulei. This fungal disease has restricted the natural rubber production on a commercial scale in South and Central America. Most of the control measures such as use of modern systemic fungicides and improved application techniques have all been unsuccessful in limiting the growth of SALB.

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