A) Late blight of potato?Altemaria solani
B) Black rust of wheat?Puccinia graminis
C) Loose smut of wheat?Ustilago nuda
D) Root-knot of vegetables?Meloidogyne sp.
Correct Answer: A
Solution :
The causative agent of late blight of potato is fungus Phytophthora infestans, class-Oomycetes, order-Peronosporales, family-Pythiaceae. In India, the late blight of potato is a seed born disease.
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