Vol. 11, Issue 8 (2022)

Author(s):
K Priyanka Reddy, Dr. K Arunodhayam, Dr. K Gopal, Dr. T Rajasekharam, Dr. B Sreenivasulu and Dr. CH Ruth

Abstract:
Acid lime is prone to attack by more than 150 diseases caused by fungal, viral and few bacterial pathogens right from the nursery level to bearing stage resulting in considerable yield loss. An extensive roving survey was conducted during 2021-2022 to assess the incidence of bark and wood splitting disease (Lasiodiplodia theobromae) in acid lime at YSR Kadapa, Kurnool, Chittoor and SPSR Nellore districts of Andhra Pradesh and observed the per cent disease incidence of 0.66-8.00. We had reported that the disease incidence varied considerably among different locations, with a range of 0.66 to 8.00 per cent. The mean maximum disease incidence was observed in Tirupati (8.00%) followed by Kurnool (5.81%), Kadapa 4.11% and and least incidence (3.95%) was recorded from Nellore district. Among the 12 different locations surveyed, the highest disease incidence was recorded from Tirupati (8.00%) of Chittoor district and least incidence was observed in Pagadalapalle (0.66%) of Kadapa district. During this survey we had observed the symptoms of longitudinal splits on trunk and branches, internal discoloration on the infected bark and twigs.