Studies of potato apical leaf curl virus disease in potato
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Date
2014
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Publisher
CCSHAU
Abstract
The experiment entitled “Studies of potato apical leaf curl virus disease in potato” was conducted at
Research Area Department of Vegetable Science, Chaudhary Charan Singh Haryana Agricultural University, Hisar
during Rabi season of 2012-13 and 2013-14. Potato is an important staple food of the world and has potential of
much needed nutritious food. The potato apical leaf curl virus disease (PALCVD) infected plants exhibited
symptoms such as vein clearing, crinkling, vein thickening, upward curling of leaf margin and leaf margin became
wavy. In the present study, all the seven varieties viz., Kufri Pushkar, Kufri Bahar, Kufri Pukhraj, Kufri
Badshah, Kufri Khyati, Kufri Surya and Kufri Sadabahar were vectored by whitefly attack, for potato apical leaf
curl virus disease (PALCVD) incidence. The correlation between whitefly population on all varieties and weather
parameters like maximum and minimum temperature and evening relative humidity and wind speed were the more
contributing which predicted the vector populations. Per cent incidence of PALCVD differ from variety to variety.
Per cent disease incidence was found to range to 0.00 to 100% depending upon the varieties. Variety Kufri Khyati
showed maximum disease incidence up to 100% followed by Kufri Pukhraj (60%). There was no disease incidence
in Kufri Bahar variety. In biochemical analysis it was found that the roles of biochemicals total phenol, flavanols,
peroxidase, and tannin play an important role in defence mechanism in potato crop for PALCVD. All the
biochemical parameters showed that the content were more in resistant variety (Kufri Bahar) less in moderately
resistant variety (Kufri Pushkar) and least in susceptible variety (Kufri Khyati). It was also inferred from the study
that within the variety the diseased leaves had more biochemical content than healthy leaves except in Kufri Bahar
(resistant) variety, which had no visible symptoms. Three hundred ten potato germplasm lines were screened in the
field under artificial disease stress conditions against PALCVD of potato. Three lines Kufri Bahar,CP 1458 and
HIS 98-55 were found resistant to the disease while 137 entries was categorized under moderately resistant group.
Description
Keywords
Potato, Kufri, Whitefly, Temperature, Relative humidity, PALCVD, Biochemical, Grermplasm lines.