Open AccessDISEASE INCIDENCE AND SEVERITY OF SCLEROTIUM ROLFSII ON ARACHIS HYPOGEA L
Author(s) -
Afsana Praveen,
C. Kannan
Publication year - 2021
Publication title -
plant archives/plant archives
Language(s) - English
Resource type - Journals
eISSN - 2581-6063
pISSN - 0972-5210
DOI - 10.51470/plantarchives.2021.v21.no1.047
Subject(s) - sclerotium , arachis , biology , mycelium , incidence (geometry) , veterinary medicine , arachis hypogaea , stem rot , pathogenicity , horticulture , agronomy , medicine , microbiology and biotechnology , physics , optics
Groundnut or peanut (Arachis hypogea L.) is an important oilseed and edible crops of the world. It is affected by many diseases, among which stem rot disease caused by Sclerotium rolfsii is major fungal disease that cause severe yield losses up to 80%. An experiment wasconducted in Tamil Nadu during 2019-2020, to study the cultural, morphological and pathogenicity of different isolates of S. rolfsii infecting groundnut in major cultivating areas of Tamil Nadu. The overall disease severity ranges from 9.82 to 36.83 percent. The highest disease incidence 36.83 per cent was noticed in the Kalpadai village and the least incidence 9.82 per cent was recorded in Pattukotttai village. All the isolates varied their ability to produce abundant mycelium and sclerotial production. The pathogenicity test was conducted to all the twenty isolates and the isolate Sr6 exhibited the maximum disease incidence and proved to be more virulent.