Annals of Applied Biology (2007) 151, 67-75

B. Mandal, M.L. Wells, N. Martinez-Ochoa, A.S. Csinos and H.R. Pappu (2007)
Symptom development and distribution of Tomato spotted wilt virus in flue-cured tobacco
Annals of Applied Biology 151 (1), 67-75
Abstract: Tomato spotted wilt virus (TSWV) is an economically important viral pathogen of flue-cured tobacco, Nicotiana tabacum. Disease development and in planta distribution of TSWV were studied following mechanical inoculation of cv. K326 at various stages of growth. The effect of plant age on the disease development, distribution of symptoms and TSWV were studied by inoculating plants in five age groups, 40, 60, 75, 95 and 100 days after sowing (DAS). The plant age at the time of infection had no significant influence on the incidence of localised infection; however, it had a significant effect on the development of systemic symptoms and distribution of TSWV in the plant. In a higher proportion of plants (89.2%), no systemic symptoms developed when plants were inoculated at 60-100 DAS. However, 90% of plants became systemically infected when plants were inoculated at 40 DAS. The systemic symptom expression was severe and distributed in all the leaves in 40-DAS plants, whereas in 60- to 100-DAS plants, it was erratic and restricted only to a few upper leaves. Results show that plant age is an important factor for TSWV infection of tobacco and mature tobacco plants significantly reduced the systemic development of the disease.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Hanu R. Pappu, Bikash Mandal, Natalia Martinez-Ochoa

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Orthotospovirus tomatomaculae	Tobacco (Nicotiana tabacum)