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Black (stem) rust of wheat is caused by
Options
(a) Alternaria solani
(b) Ustilago nuda
(c) Puccinia graminis
(d) Xanthomonas oryzae
Correct Answer:
Puccinia graminis
Explanation:
Black stem rust is caused by Puccinia graminis. The genus Puccinia includes 700 species, which cause rust disease of many economic plants such as wheat, barley, oats, etc. It is called a rust because of the reddish brown color of the spores that are found chiefly upon the surface of the host leaves and stem. P. graminis is heteroecious i.e., requiring two hosts, wheat and barberry for the completion of normal life cycle. According to the nature of the spores, the life cycle of the P.graminis is divided into
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Topics: Diversity In Living World
(339)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Deeply sown seeds do not germinate and do not come up over due to the deficiency
- Excessive aerenchyma is the characteristic of
- Convexcity of one bone articulates with conavity of other bone in
- In human beings, the second meiotic division in the ovum occurs
- When the members of one population do not breed at the same time of the year
Topics: Diversity In Living World (339)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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