Vol. 12, Issue 12 (2023)

Author(s):
Sreedhar Devarakonda, Dr. C Madhumathi, Dr. L Mukunda Lakshmi, Dr. V Umamahesh, Dr. Venkata Satish Kuchi, Dr. B Prathap, Dr. V Vijaya Bhaskar and Dr. T Rajasekharam

Abstract:
The experiment was carried out at Horticultural Research Station, Anantharajupeta, Annamayya district, A.P with the application plant elicitors like salicylic acid with different concentrations (50 ppm, 100 ppm and 150 ppm) and jasmonic acid with different concentrations (50 µM, 100 µM and 150 µM) sprayed one time at 45 Days After planting and two times at 45&120 Days After Planting and control (no spray). From this, it was recorded that the lowest per cent disease index (PDI) values with increasing concentration of salicylic acid and jasmonic acid applied twice enhanced the tolerance in plants to PRSV upto 240 DAT. Treatment with salicylic acid @ 50, 100, 150 ppm applied twice and treatment with jasmonic acid @ 50, 100, 150 µM applied twice imparted higher tolerance to PRSV with lowest PDI values over control in both the years 15-16 and 16-17 and in pooled mean upto 240 DAT and the above treatments are statistically comparable with each other. Whereas 100 per cent disease incidence was registered in control in both the years at 240 DAT. Significantly more number of fruits per plant was recorded in T₈ (S.A @ 100 ppm at 45 DAT and 120 DAT) (60.37) which was on a par with T₉ (S.A @ 150 ppm at 45 DAT and 120 DAT) (59.29) and T₇ (57.94).Whereas,T₉ recorded highest yield per hectare (116.06 tons ha^-1) which was comparable with T₈ (114.83 tons ha^-1)and control (T₁₃) recorded the lowest yield per hectare (77.85 tons ha^-1).