Implications of climatic on whitefly, transmissibility and potato yield loss due to tolcndv in Northern India

Data on potato revealed that whitefly survived on many horticultural and weed plants in the vicinity. High incidence of apical leaf curl disease was recorded in Kufri Anand, K. Badshsah, K. Pukhraj and K. Sutlej with To LCNDV potato. However, K. Bahar showed slow and steady development of To LCNDV-potato. In another experiment, the effect of To LCNDV-potato was recorded on % loss in tuber yield indicated that K. Anand, K. Badshah, K. Pukhraj and K. Sutlej had significantly higher 36.2, 68.9, 62.0 and 86.7% loss in yields, respectively, under ‘highly infected’ plant category while in case of Kufri Bahar, it was only 22.5%. The yield of infected plants were continued to reduce in the subsequent years due to higher titter of begomo viruses in crop. Now, it is clear that virus was initially transmitted only by whitefly and subsequently when infected tubers planted virus got multiplied and degeneration takes place at faster rate.