Discussion
Which one of the following agents causes the necrotic ring spot disease in stone fruits?
Answer: C
Necrotic ring spot of stone fruits is caused by a virus.
The disease is caused by Prunus necrotic ringspot virus, an ilarvirus that infects cherry, peach, plum, almond and other Prunus species. It produces necrotic rings and spots on the leaves, often with shot-holes as the dead tissue drops out, and it spreads through infected pollen, seed and grafted budwood.
Fungi, bacteria and nematodes cause other diseases of stone fruits, such as brown rot (a fungus) or bacterial canker, but not this ringspot disease, whose name refers to the viral symptoms.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development