Department of Plant Pathology, CCS Haryana Agricultural University, Hisar-125004.
Abstracts of Research Papers Presented during the National Symposium of Indian Virological Society at Unit of Plant Virology, Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi-110 012, October 14–1.
Potato apical leaf curl virus (PALCV) disease is becoming a threat for the potato cultivators in Haryana. The PALCV infected plants showed stunting, curling, crinkling and waviness of leaf margin in general. However, symptoms varied in different cultivars of potato. Cultivar Kufri Sutlej showed indentation of the younger leaves and small yellow patches on the leaf lamina whereas Cv. Kufri Badshah produced mottling and severe crinkling prominently. Crinkling symptoms were most severe in Cv. Kufri Pukhraj along with formation of yellow patches whereas Cv. Kufri Bahar showed mild crinkling without mottling but the leaves became leathery. An intensive survey has been done covering three major potato growing districts of the state viz. Hisar, Karnal and Kurukshetra. The per cent disease incidence (PDI) and whitefly population (per 3 compound leaves) varied from 10.38 to 34.53 and 0.56 to 1.96, respectively. High PDI of 34.53 was recorded in Cv. K. Sutlej in Kurukshetra district. An average PDI of 31.53, 28.84, 27.55, 25.94, 25.08, 18.04, 12.73 and 10.88 were observed in potato Cvs. K. Sutlej, K. Badshah, K. Ashgoka, K. Chandramukhi, K. Pukhraj, K. Anand, K. Bahar and K. Chipsona, respectively. The whitefly population varied from place to place and from cultivar to cultivar. High whitefly population of 1.96 and least of 0.56 (per 3 compound leaves) were recorded in Cvs. K. Sutlej and K. Chipsona, respectively.
