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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
Related Questions: - Breathing is controlled by
- The guts of cow and buffalo possess:
- Find right or wrong. The sporophyte in liverworts is more elaborate than that in mosses
- Spirulina is rich source of
- Deficiency symptoms of nitrogen and potassium are visible first in:
Topics: Diversity In Living World
(339)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Breathing is controlled by
- The guts of cow and buffalo possess:
- Find right or wrong. The sporophyte in liverworts is more elaborate than that in mosses
- Spirulina is rich source of
- Deficiency symptoms of nitrogen and potassium are visible first in:
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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