Vol. 12, Issue 11 (2023)

Author(s):
T Ganesh, K Vemana, BV Bhaskara Reddy, NC Venkateswarlu, A Sri Vidhya, R Sarada Jayalakshmi Devi and KSS Naik

Abstract:
Groundnut is an important oil seed, self-pollinating leguminous crop. Which is affected by several fungal, viral and phytoplasma diseases. Among soil borne diseases viz., collar rot, dry root rot and stem or pod rot are important as they cause the heavy yield loss from seedling to harvesting. In this study an attempt was made to assess the incidence and distribution of the above said soil borne diseases in various regions of the Andhra Pradesh. A roving survey was conducted during Kharif-2020 and Rabi 2020-21 in major groundnut growing areas of the Rayalaseema region of Andhra Pradesh. The groundnut cultivar Kadiri-6 was grown predominantly in all the surveyed locations. During Kharif-2020 the maximum incidence of collar rot was recorded in SPSR Nellore (5.4%) district, where as lowest incidence was observed in Kurnool (3.0%) district. The maximum dry root rot incidence was recorded in the Anantapuramu (8.9%) district, whereas as lowest incidence was observed in Chittoor district (6.7%). The maximum stem rot incidence was recorded in the Anantapuramu (6.8%) district, whereas as lowest incidence was observed in SPSR Nellore district (5.4%). In Rabi 2020-21 the maximum incidence of the collar rot was recorded in Anantapuramu (7.7%) district, where as lowest incidence was observed in Kurnool district (2.3%) district. The maximum dry root rot incidence was recorded in the Chittoor district (9.9%) district, whereas as lowest incidence was observed in SPSR Nellore district (5.6%). The maximum stem rot incidence was recorded in the Anantapuramu (7.9%) district, whereas as lowest incidence was observed in Kurnool district (3.6%).