Question:
Citrus rootstocks susceptible to Phytophthora and Tristeza are
A. Alemo
B. Rough lemon
C. Savage
D. X-639
Choose the correct answer from the options given below:
Citrus rootstocks susceptible to Phytophthora and Tristeza are
A. Alemo
B. Rough lemon
C. Savage
D. X-639
Choose the correct answer from the options given below:
A. Alemo
B. Rough lemon
C. Savage
D. X-639
Choose the correct answer from the options given below:
Show Hint
Citrus diseases:
- Phytophthora: Root rot, gummosis.
- Tristeza: Viral disease.
- Susceptible rootstocks: Alemo, Rough lemon.
- Phytophthora: Root rot, gummosis.
- Tristeza: Viral disease.
- Susceptible rootstocks: Alemo, Rough lemon.
Updated On: Sep 1, 2026
- A & B only
- B & D only
- C & D only
- A & C only
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of citrus rootstocks and their disease susceptibility.
Step 2: Detailed Explanation:
Alemo (A) and Rough lemon (B) are susceptible to Phytophthora and Tristeza.
Savage (C): Not a standard rootstock.
X-639 (D): Not a standard rootstock.
Thus, A and B are the susceptible rootstocks.
Step 3: Final Answer:
Thus, the correct answer is A & B only, which corresponds to option (A).
[0.5cm]
This question tests knowledge of citrus rootstocks and their disease susceptibility.
Step 2: Detailed Explanation:
Alemo (A) and Rough lemon (B) are susceptible to Phytophthora and Tristeza.
Savage (C): Not a standard rootstock.
X-639 (D): Not a standard rootstock.
Thus, A and B are the susceptible rootstocks.
Step 3: Final Answer:
Thus, the correct answer is A & B only, which corresponds to option (A).
[0.5cm]
Was this answer helpful?
0
0
Top ICAR AIEEA Horticulture Questions
- In banana:
Statement (A): Bunch feeding is a simple and low-cost method.
Statement (B): It is the direct way to supply nutrients to the bunch.
Statement (C): Only micronutrients can be given through this method.
Choose the correct answer from the options given below. - The softwood grafting
Statement (I): Is done with mature, procured scion on the emerging soft, coppery-red shoot of the rootstock, which is 60-70 days old.
Statement (II): Is used for raising desired varieties of mango, sapota, tamarind and cashew.
In light of the above statements, choose the most appropriate answer from the options given below. - Given below are two statements:
Statement (I): In garlic modified roots are economic part.
Statement (II): Characteristic odour in garlic is due to volatile organic sulfur-containing compounds that are rapidly produced upon tissue damage and diffuse into the air.
In light of the above statements, choose the most appropriate answer from the options given below. - Given below are two statements:
Statement (I): The flowers of ridge gourd start opening in the evening and remain open throughout the night.
Statement (II): Pollination of ridge gourd is done in the day time.
In light of the above statements, choose the most appropriate answer from the options given below. - Given below are two statements:
Statement (I): The first gynoecious based hybrid of bitter gourd is Pusa Hybrid-4 developed by ICAR-IARI, New Delhi.
Statement (II): The male:female ratio of the gynoecious based hybrids of bitter gourd is 25:1.
In light of the above statements, choose the most appropriate answer from the options given below.
View More Questions
Top ICAR AIEEA Mycology & Plant Pathology Questions
- Mango malformation was reported for the first time in the year
- What is the somatic chromosome number of Elephant foot yam?
- Little leaf disease of brinjal is transmitted by
Match List-I with List-II:
List-I (Disease) List-II (Indicator Plant) (A) Tristeza (I) Kagzi Lime (B) Exocortis (II) Rangpur Lime (C) Psorosis (III) Sweet Orange var. Pineapple (D) Greening (IV) Sweet Orange var. Valencia - Which of the following biocontrol agent is recommended to control diamond back moth (DBM), serious pests of cruciferous crops particularly cabbage and cauliflower ?
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