Management of Stem-rot of Groundnut (Arachis hypogaea L.) Cultivar in Field

Abstract

The present experiment was conducted at University of Pune for biocontrol of soil-borne plant pathogen Sclerotium rolfsii by incorporating arbuscular mycorrhizal fungi (Glomus fasciculatum) and conventional system of cultivation with different spacing pattern (15 and 30 cm) in field. Both mycorrhizal inoculation and 30 cm spacing pattern significantly increased growth and yield as compared to control or 15 cm spacing pattern. The pathogenic mycorrhizal groundnut plants in 30 as well as 15 cm spacing pattern showed better growth in terms of plant height, leaf and pod number, fresh and dry weight of whole groundnut plant in comparison to non-mycorrhizal pathogenic ones and the plant growth was better in 30 spacing than 15 cm. The colonization by AM fungi in both spacing pattern was higher in absence of pathogen S. rolfsii. However, pathogen's presence decreased the mycorrhizal colonization considerably in 30 and 15 cm. The disease severity and incidence were recorded to be lowered when inoculated with mycorrhiza in pathogenic groundnut plants as compared to non-mycorrhizal pathogenic ones in both spacing pattern and incidence and severity was significantly lower in 30 cm as compared to 15 cm. Therefore, it was observed from our results that for management of soil-borne pathogens inoculation of AM fungi and spacing patterns are necessary.

Effect of Actinobacteria and Pseudomonas spp. against Sclerotium rolfsii in Groundnut

“…Soil inoculation method of pathogenicity test was confirmed by Doley and Jite (2013); Biswas and Sen (2000) and Anahosur (2001). On the basis of morphological and cultural characteristics and pathogenicity, test the pathogens were confirmed as Sclerotium rolfsii.…”

Draft whole genome sequence of groundnut stem rot fungus Athelia rolfsii revealing genetic architect of its pathogenicity and virulence

“…Athelia rolfsii is the sexual state of the fungus, but it is rarely seen, in contrast to the asexual state, known as Sclerotium rolfsii . It causes average loss of 25% 3 which goes upto 80% in severe cases 4 . This soil borne pathogen has vast range of host (>500 plant species) due to its ability of high growth rate along with production of cell degrading enzymes 5 .…”

Disease Incidence and Severity of Sclerotium Rolfsii on Arachis Hypogea L

“…Stem rot is also known as Sclerotium blight, Sclerotium rot, Sclerotium wilt, southern blight, southern stem rot, root rot, white mould and pod rot. The yield losses usually range from 10 to 25 per cent in India, Thailand, Indonesia, Taiwan, and the Philippines but may reach 80 per cent in severely infested fields (Doley K and Kaur JITE, 2013).…”