Question:
Wheat blast is one of the recent plant disease outbreaks in Asia
(A). Wheat blast is caused by Puccinia graminis
(B). Wheat blast is caused by Fusarium graminearum
(C). Wheat blast is caused by Magnaporthe oryzae Triticum
(D). Wheat blast primarily affect spikes and panicles
Choose the correct answer from the options given below:
Wheat blast is one of the recent plant disease outbreaks in Asia
(A). Wheat blast is caused by Puccinia graminis
(B). Wheat blast is caused by Fusarium graminearum
(C). Wheat blast is caused by Magnaporthe oryzae Triticum
(D). Wheat blast primarily affect spikes and panicles
Choose the correct answer from the options given below:
(A). Wheat blast is caused by Puccinia graminis
(B). Wheat blast is caused by Fusarium graminearum
(C). Wheat blast is caused by Magnaporthe oryzae Triticum
(D). Wheat blast primarily affect spikes and panicles
Choose the correct answer from the options given below:
Show Hint
Wheat blast is caused by Magnaporthe oryzae pv. Triticum (related to rice blast) and primarily targets the wheat head (spike), turning it completely white and sterile.
Updated On: Jul 31, 2026
- (C) and (D) only.
- (B) and (D) only.
- (A) and (B) only.
- (B), (C) and (D) only.
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Wheat blast is an emerging, highly destructive fungal disease of wheat crops that can cause complete crop loss under favorable weather conditions.
Understanding the causal organism, host tissues affected, and geographical spread is essential for managing this disease and protecting global food security.
Step 2: Detailed Explanation:
Let us analyze each of the given statements:
Statement (A) is incorrect: Puccinia graminis is the causal agent of stem rust of wheat, which is a structurally and biologically distinct fungal disease characterized by rusty pustules on stems and leaves.
Statement (B) is incorrect: Fusarium graminearum causes Fusarium head blight (FHB) in wheat, which also bleaches heads but is a different disease characterized by mycotoxin accumulation.
Statement (C) is correct: Wheat blast is caused by the ascomycete fungus Magnaporthe oryzae pathotype Triticum (abbreviated as MoT).
This pathogen was first identified in Brazil in 1985 and remained restricted to South America for decades until a major outbreak occurred in Bangladesh in 2016, marking its introduction to Asia.
Statement (D) is correct: The most diagnostic symptom of wheat blast is the premature bleaching of the wheat spikes (heads) and panicles.
The fungus infects the rachis of the spike, blocking the transport of water and nutrients, which leaves the spikelets above the infection point sterile and bleached.
Thus, only statements (C) and (D) are correct.
Step 3: Final Answer:
Hence, the correct option is (A).
Wheat blast is an emerging, highly destructive fungal disease of wheat crops that can cause complete crop loss under favorable weather conditions.
Understanding the causal organism, host tissues affected, and geographical spread is essential for managing this disease and protecting global food security.
Step 2: Detailed Explanation:
Let us analyze each of the given statements:
Statement (A) is incorrect: Puccinia graminis is the causal agent of stem rust of wheat, which is a structurally and biologically distinct fungal disease characterized by rusty pustules on stems and leaves.
Statement (B) is incorrect: Fusarium graminearum causes Fusarium head blight (FHB) in wheat, which also bleaches heads but is a different disease characterized by mycotoxin accumulation.
Statement (C) is correct: Wheat blast is caused by the ascomycete fungus Magnaporthe oryzae pathotype Triticum (abbreviated as MoT).
This pathogen was first identified in Brazil in 1985 and remained restricted to South America for decades until a major outbreak occurred in Bangladesh in 2016, marking its introduction to Asia.
Statement (D) is correct: The most diagnostic symptom of wheat blast is the premature bleaching of the wheat spikes (heads) and panicles.
The fungus infects the rachis of the spike, blocking the transport of water and nutrients, which leaves the spikelets above the infection point sterile and bleached.
Thus, only statements (C) and (D) are correct.
Step 3: Final Answer:
Hence, the correct option is (A).
Was this answer helpful?
0
0
Top ICAR AIEEA Plant Sciences Questions
- Both plant and animal cells contain some small organelles called 'peroxisomes', which are dedicated to the metabolism of substances such as
- Chemicals that store energy for the majority of work within cells are called
- The longest phase during the eukaryotic cell cycle is
- The formula: [Sum of (Observed-Expected)$^2$/Expected] is also known as
- Human beings have a large-sized 'proteome'. The principal and more significant reason for this is-
View More Questions
Top ICAR AIEEA Plant Pathology Questions
- Which of the following is known to cause abnormal and unlimited proliferation of plant cells?
- Which of the following was responsible for the extinction of the Banana Variety "Gros Michel" from the market due to its high susceptibility?
- Choose the correct option about Magnaporthe
A. Magnaporthe affects only monocots
B. Magnaporthe affects only dicots
C. Magnaporthe is seed-borne
D. Magnaporthe is non motile - Match List-I with List-II
List-I (Biocompound):
(A). 2, 4-diacetyl-phloroglucinol
(B). Herbicolin
(C). Zwittermicin A
(D). Xanthobaccin A
List-II (Organism):
(I). Pseudomonas fluorescens
(II). Pantoea agglomerans
(III). Bacillus cereus
(IV). Lysobacter sp. - Match List-I with List-II
List-I (Component of microscope):
(A). Turret in a microscope
(B). Condenser in a microscope
(C). Arm of a microscope
(D). Ocular lens
List-II (Description):
(I). Lever beneath the opening in the stage consists of a shutter-like group of metal leaves which regulate the amount of light coming through the slide on the stage
(II). Revolving plate which bears the objective lens, attached at the lower end of the tube, can be turned to change the objective lens
(III). Short metal tube that contains a lens that fits into the top of the tube
(IV). Nearly C-shaped pillar arising from the base that supports the stage and ocular components
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions