Survey and Invivo Control of Stem Rot Pathogen of Groundnut (Sclerotium rofsii L.) Using Garlic Leaf Extracts in Adamawa State

Abstract

The survey and control of stem rot disease of groundnut in Adamawa State was conducted from 2017 to 2023. The research focused on groundnut incidence of stem rot pathogen, proximate composition and its in vivo management of the pathogen using leaf extracts of Allium sativum. Samples collected from nine local government areas of Adamawa State were taken to Plant Science laboratory of Modibbo Adama University, Yola in a dry sterile polythene bag. Field management of Sclerotium rolfsii was conducted in the Departmental and Federal Polytechnic Mubi farm. Potato Dextrose Agar (PDA) was used for the isolation and in vitro control trials. The result for incidence of stem rot disease of groundnut from the nine Local Government Areas of Adamawa State showed Mubi North had the highest incidence of 22.34 %, while Guyuk had the least incidence of 6.75 %. The composition of the infected groundnut seeds shows a decrease in lipid, protein, ash, fibre and carbohydrates while there was an increase in moisture as a result of the activities of the pathogen. The level of inhibition increased with increase in concentrations. High increase in growth (NL=87 and NB=31) and yield characters (NP=54, NMP= 51 and NHP= 52) were also recorded in the treated groundnut farms compared with the non-treated control.