The 'Witches' broom of legumes' is caused by a

Virus

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Phytoplasma

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Bacterium

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Fungus

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Solution

The correct option is B Phytoplasma
The 'Witches' broom of legumes' is caused by Phytoplasma. In this disease, the structure of the plant is changed because of some deformity and gives the appearance of broom. It occurs because hormone cytokinins interferes with auxin in the bud and leads to overgrowing of apices and giving it such apperance.
So, the correct answer is option B.

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