Potato virus A
Family : Potyviridae
Genus : Potyvirus
Acronym : PVA
Introduction
Potato virus A (PVA) belongs to the genus Potyvirus infects potato causing mild mosaic similar to the symptoms caused by Potato virus X, differences can be difficult to detect visually, but PVA mottles may appear on the veins, and infected leaves look shiny. Infected plants may have a more open habit. Although visually similar to PVX, this virus is related to PVY and is spread by aphids.
Major Diseases
Mosaic disease
Geographical Distribution
Wherever potato is grown
Particle Morphology
Flexuous rod shaped particles of 730 x 11 nm
Transmission Method
At least seven aphid species are capable of transmitting PVA (including Aphis frangulae, Macrosiphum euphorbiae, and Myzus persicae) non-persistently.
Detection
ELISA, RT-PCR and IC-RT-PCR
Host Range and Symptomatology
| Host | Symptoms |
| Potato | Mild mosaic on leaves, mottling appear on the veins. |
References
| 1 | Garg, I. D., Virus and virus-like diseases of potato and their management.. 2005, Challenging problems in horticultural and forest pathology, pp 200-222. |
| 2 | Garg, I. D.; Chandla, V. K.; Khurana, S. M. P.; Narendra Singh, Potato cultivation and health status of the crop in Leh and Ladakh (J&K).. 2003, Journal of the Indian Potato Association, 30, 1/2, pp 121-122. |
| 3 | Garg, I. D.; Singh, M. N.; Khurana, S. M. P.; Jai Gopal, Virus analysis of indigenous potato germplasm collection.. 1999, Journal of the Indian Potato Association, 26, 3/4, pp 111-117. |
| 4 | Lakra, B. S., Evaluation and estimation of rate of degeneration of different potato varieties due to viral diseases.. 2000, Journal of Mycology and Plant Pathology, 30, 1, pp 85-86. |
| 5 | Nagaich, B. B., Virus and mycoplasma diseases of potato in India.. 1975, Tr. Biol.-Pochv. Inst. Dal'nevost. Nauch. Tsentr AN SSSR, 31, 134, pp 43-58. |
| 6 | Sarjeet Singh; Barker, H.; Shiv Kumar, Prospects of penicillinase ELISA for detection of plant viruses in the developing countries.. 2000, Potato, global research & development. Proceedings of the Global Conference on Potato, New Delhi, India, 6-11 December, 1999: Volume 1, 134, pp 433-438. |
| 7 | Shekhawat, G. S.; Khurana, S. M. P.; Singh, B. P., Important diseases of potato and their management.. 2000, Potato, global research & development. Proceedings of the Global Conference on Potato, New Delhi, India, 6-11 December, 1999: Volume 1, 134, pp 281-303. |
| 8 | Singh, R. K.; Jyotsna Sharma, Field performance of microtubers of different potato cultivars in plains.. 2001, Journal of the Indian Potato Association, 28, 1, pp 86-87. |