Invasive Species Compendium

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Abstract

First report of Potato virus Y in potato in Tajikistan.

Abstract

In June 2011, a survey of potatoes was conducted in farmers' fields in the Buston and Dushanbe regions (about 200 miles apart) of Tajikistan. Potato plants with stunted growth and leaves showing chlorotic spots, curling, and necrotic spots and rings were observed with the disease incidence monitored in 10 fields each in Buston and Dushanbe areas varying between 10 and 60%. Representative samples from symptomatic plants tested positive for Potato virus Y. A global phylogenetic analysis of sequences revealed the presence of PVYO in both samples from Dushanbe and one sample from Buston regions and presence of PVYNTN in the remaining five samples from the Buston region. This is thought to be the first confirmed report of two distinct strains of PVY in potato in Tajikistan.