Almanac Pests
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Almanac Pests
Plant pests of current importance (potential or existing risk for the European region)
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Agdia Announces New Direct-Seed Testing Program for PSTVd in Tomato

News: Agdia Announces New Direct-Seed Testing Program for PSTVd in Tomato http://t.co/HQ4NixiH


Elkhart, Indiana (January 5, 2013)--A leading provider of agricultural diagnostic test kits and services has implemented a new, novel, testing method for diagnosing Potato spindle tuber viroid (PSTVd) in tomato seed.

Knapco's insight:

Of the many diseases caused by viroids, the spindle tuber disease of potatoes was the first to be recognized and studied by plant pathologists. Nearly 50 years were to elapse between initial description of this disease in the early 1920's and the identification of its causal agent, a small, highly-structured, covalently closed circular RNA molecule known as Potato spindle tuber viroid (PSTVd). PSTVd remains an important pathogen of potato and tomato, and a recent increase in the number of reported latent infections of ornamental species is creating new challenges for current disease management strategies.

See: Potato spindle tuber

Owens, R.A. and J.Th.J. Verhoeven. 2009. Potato spindle tuber. The Plant Health Instructor. DOI: 10.1094/PHI-I-2009-0804-01

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Polymorphism and Population Structure of two Pospoviroids

Polymorphism and Population Structure of two Pospoviroids | Almanac Pests | Scoop.it

MyJournals.org. Analysis of Sequence Polymorphism and Population Structure of Tomato chlorotic dwarf viroid and Potato spindle tuber viroid in Viroid-Infected Tomato Plants is presented. The results demonstrated for the first time that TCDVd, like many other viroids including PSTVd, exists in host plants as a collective group comprised of various sequence variants. However, in comparison to PSTVd, TCDVd is less polymorphic in tomato plants as fewer variants and lower haplotype/nucleotide diversities were observed.

Viruses, Vol. 4, Pages 940-953 

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