Yellow or stripe rust of wheat is caused by which pathogen?
Correct answer D. Puccinia striiformis
Topic / 34 questions
Plant Pathology MCQs
Page 2 of Plant Pathology multiple-choice questions with answers. Tap an option to check yourself.
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Which plant serves as the alternate host of the black stem rust of wheat?
Correct answer B. Barberry
Which spore stage of wheat rust repeats many times in a season and spreads the disease from plant to plant?
Correct answer B. Urediniospores
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Loose smut of wheat is caused by which fungus?
Correct answer A. Ustilago tritici
Karnal bunt of wheat is caused by which fungus?
Correct answer A. Tilletia indica
Late blight of potato, which caused the Irish famine, is caused by which organism?
Correct answer B. Phytophthora infestans
Early blight of potato, marked by concentric target-like rings on leaves, is caused by which fungus?
Correct answer B. Alternaria solani
Blast disease of rice is caused by which fungus?
Correct answer A. Magnaporthe oryzae (Pyricularia oryzae)
Bacterial leaf blight of rice is caused by which pathogen?
Correct answer C. Xanthomonas oryzae pv. oryzae
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Brown spot of rice, linked with the Bengal famine of 1943, is caused by which fungus?
Correct answer A. Bipolaris oryzae (Helminthosporium oryzae)
Which bacterium converts ammonia into nitrite?
Correct answer A. Nitrosomonas
Which of these bacteria is gram-positive?
Correct answer A. Corynebacterium
Where do coprophilic fungi live?
Correct answer B. Dung substratum (herbivore feces)
Which disease is caused by Erysiphe?
Correct answer C. Powdery mildews