Vol. 12, Issue 8 (2023)

Author(s):
Jitendra Kumar, HK Singh, SN Rahul, Abhishek Singh and Aman Singh

Abstract:
Aonla, also known as Indian gooseberry or Emblica officinalis Gaertn., holds great significance as an indigenous fruit in India. It belongs to the family Euphorbiaceae and the order Euphorbiales. The present investigation was conducted during rabi season 2022 crop seasons at Main Experimental Station, A.N.D.U.A.&T., Kumarganj, Ayodhya to tested the resistance of Fifteen commercial cvs. /Germplasm against Ravenelia emblicae Styd. under natural conditions. Each germplasm was screened, first appearance of the disease in September month, out of 15 germplasm, results was found seven germplasm were moderately susceptible (BSR-1, Anand-1, NA-25, NA-26 NA-27, NA-29, NA-32), seven were susceptible (NA-4, NA-5, NA-6, NA-7, NA-10, NA-20, Francis) and one was highly susceptible (Chakaiya) to aonla rust. among the 15 germplasms, NA-29 showed the least severity of aonla rust (15.66%), However, highest percent disease severity (PDS) was observed in Chakaiya (55.33%). The highest rate of infection, which was occurred in NA-4 (0.140) and Chakaiya (0.124). however, the minimum rate of infection was observed in both Anand-1 and BSR-1 which was 0.010 and 0.024, respectively. AUDPC calculated for the 15 germplasms on the basis of the disease severity varied from 624.9 to 3909.55 showing the fast progress of the disease in all germplasm.