Rust diseases are caused by
A. {Puccinia
B. {Albugo
C. {Cephaleuros
D. {Uromyces
E. {Gymnosporangium
Choose the correct answer from the option given below
A. {Puccinia
B. {Albugo
C. {Cephaleuros
D. {Uromyces
E. {Gymnosporangium
Choose the correct answer from the option given below
Show Hint
White Rust = Albugo. (Oomycetes).
Red Rust = Cephaleuros. (Algae).
- Puccinia causes rust only on wheat
- Albugo causes rust on mustards
- Cephalerous causes rust on barley
- Uromyces and Gymnosporangium causes rust on tomato
The Correct Option is B
Solution and Explanation
The question asks to evaluate specific statements about "rust" diseases, which can refer to "true rusts" (Basidiomycetes) or "white rusts" (Oomycetes).
Step 2: Detailed Explanation:
• Statement 2 (Correct): Albugo candida is an Oomycete that causes "White Rust" (or white blister) on mustards and other brassicas. Although not a true rust taxonomically, it is universally known as white rust.
• Statement 1 (Incorrect): Puccinia is a massive genus with over 4,000 species that cause rust on a wide variety of plants including sunflower, sorghum, and maize, not just wheat.
• Statement 3 (Incorrect): Cephaleuros is a green algae that causes "Red Rust" on tea and coffee, not barley.
• Statement 4 (Incorrect): Uromyces (e.g., U. appendiculatus) causes rust on beans. Gymnosporangium causes cedar-apple rust. Neither is a major pathogen of tomato.
Final Answer:
The only factually accurate statement among the options is that Albugo causes rust on mustards.
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