Destruction of 50% maize plants in USA (1970) due to infection of – McqOptions

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1.	Destruction of 50% maize plants in USA (1970) due to infection of
A.	Hemileia vastratrix
B.	Helminthosporium oryzae
C.	Claviceps purpurea
D.	Ustilago maydis
Answer» E.

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