PJB-2023-461
SURVEY FOR INCIDENCE AND PATHOGINICITY OF ROOT ROT PATHOGENS OF GROUNDNUT IN POTHWAR REGION OF PUNJAB, PAKISTAN
Muhammad Inam ul Haq
Abstract
Soil borne diseases have been known as one of the significant limiting factor in groundnut production. In Pakistan, no immense research work has been done on groundnut root rot. The present survey was carried out during 2019 and 2020 for the assessment of disease incidence and isolation of phytopathogenic fungi causing root rot of groundnut in seven tehsils of three districts of Pothwar regions viz.Chakwal (Chakwal,Talagang), Rawalpindi (Gujar khan), Attock (Attock, Jand, Pindi gheb, Fateh Jang). Results revealed that root rot of groundnut prevalent was 61.25% in surveyed area. Two hundred and sixty five (265) infected roots samples were collected from 480 farmer’s fields of 79 villages during two years. No.334 was prominent groundnut cultivar in all surveyed area. The highest disease incidence was 14.2% and 15.9% in tehsil Attock, while lowest was 8.0% and 9.6% in tehsil Gujarkhan during 2019 and 2020 respectively. Total 104 fungal isolates were obtained from the groundnut cultivation areas were Athelia rolfsii (49%) followed by Fusarium fujikuroi (29.8%) and Aspergillus terreus (21.2%). Athelia rolfsii (CHGR2a) had the utmost virulence followed by Fusarium fujikuroi (CHGRF5) and Aspergillus terreus (TGGR7). The pathogenicity test on groundnut cultivar No.334 revealed that the disease severity rates of Athelia rolfsii, Fusarium fujikuroi and Aspergillus terreus were ranging from 27.53%–93.3%, 24.4%–88.9%, and 23.3%–84.4%, respectively.
Key words: Groundnut, Survey, Root rot, Fusarium, Sclerotium, Aspergillus, Incidence.
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