Which one of the following is a disease caused by zinc deficiency?

Die back of rice

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Khaira disease of rice

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Black heart of potato

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Brown spot of rice

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Solution

The correct option is A Khaira disease of rice
B. Khaira disease of rice
Khaira disease of rice is caused by zinc deficiency whereas Die back of rice is caused by Ceratobasidium ramicola (fungus), Black heart of potato is caused by oxygen deprivation and excess of carbon dioxide, Brown spot of rice is caused by Cochliobolus miyabeanus (fungus).

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