Question:
Monocyclic diseases are incited by soilborne pathogens
(A). Monocyclic diseases are usually observed in perennial crops
(B). Monocyclic disease complete one life cycle in a year
(C). Monocyclic disease can be controlled by soil treatment
(D). Monocyclic diseases are usually endemic in a particular location
Choose the correct answer from the options given below:
Monocyclic diseases are incited by soilborne pathogens
(A). Monocyclic diseases are usually observed in perennial crops
(B). Monocyclic disease complete one life cycle in a year
(C). Monocyclic disease can be controlled by soil treatment
(D). Monocyclic diseases are usually endemic in a particular location
Choose the correct answer from the options given below:
(A). Monocyclic diseases are usually observed in perennial crops
(B). Monocyclic disease complete one life cycle in a year
(C). Monocyclic disease can be controlled by soil treatment
(D). Monocyclic diseases are usually endemic in a particular location
Choose the correct answer from the options given below:
Show Hint
Monocyclic diseases lack secondary spread within a single season. Because they are caused by soilborne pathogens, soil sanitation and rotation are primary control strategies.
Updated On: Jul 31, 2026
- (A), (B) and (D) only.
- (A), (B) and (C) only.
- (B), (C) and (D) only.
- (A), (B), (C) and (D) only.
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Plant diseases can be classified as monocyclic or polycyclic based on the number of disease cycles they complete per cropping season.
Monocyclic diseases complete only one disease cycle per season, relying entirely on primary inoculum with no secondary spread within the same crop cycle.
Step 2: Detailed Explanation:
Let us analyze the properties of monocyclic diseases:
Statement (A) is correct: Many monocyclic diseases affect long-lived perennial crops (e.g., vascular wilts like Dutch Elm disease, or root rots in orchard trees).
Since the host is present year-round, the pathogen slowly builds up over multiple years through a single annual cycle of infection.
Statement (B) is correct: By definition, monocyclic pathogens complete exactly one life cycle (or infection cycle) per year or growing season.
There is no secondary inoculum (like asexual spores) produced that can spread and initiate new infections within the same season.
Statement (C) is correct: Because monocyclic diseases are primarily caused by soilborne pathogens (such as Fusarium oxysporum or Verticillium dahliae) that rely on primary soil inoculum to infect, soil treatments are highly effective control measures.
These treatments include soil solarization, chemical fumigation, steam sterilization, and crop rotation.
Statement (D) is correct: Soilborne pathogens have limited mobility in the soil matrix.
As a result, monocyclic diseases tend to be highly localized or endemic to specific fields or locations where the soil has become contaminated over time.
Since all four statements are correct, Option (D) is the correct choice.
Step 3: Final Answer:
Hence, the correct option is (D).
Plant diseases can be classified as monocyclic or polycyclic based on the number of disease cycles they complete per cropping season.
Monocyclic diseases complete only one disease cycle per season, relying entirely on primary inoculum with no secondary spread within the same crop cycle.
Step 2: Detailed Explanation:
Let us analyze the properties of monocyclic diseases:
Statement (A) is correct: Many monocyclic diseases affect long-lived perennial crops (e.g., vascular wilts like Dutch Elm disease, or root rots in orchard trees).
Since the host is present year-round, the pathogen slowly builds up over multiple years through a single annual cycle of infection.
Statement (B) is correct: By definition, monocyclic pathogens complete exactly one life cycle (or infection cycle) per year or growing season.
There is no secondary inoculum (like asexual spores) produced that can spread and initiate new infections within the same season.
Statement (C) is correct: Because monocyclic diseases are primarily caused by soilborne pathogens (such as Fusarium oxysporum or Verticillium dahliae) that rely on primary soil inoculum to infect, soil treatments are highly effective control measures.
These treatments include soil solarization, chemical fumigation, steam sterilization, and crop rotation.
Statement (D) is correct: Soilborne pathogens have limited mobility in the soil matrix.
As a result, monocyclic diseases tend to be highly localized or endemic to specific fields or locations where the soil has become contaminated over time.
Since all four statements are correct, Option (D) is the correct choice.
Step 3: Final Answer:
Hence, the correct option is (D).
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