Evaluation of fungicides against stem rot of capsicum caused by Sclerotium rolfsii Sacc

Abstract

Stem rot (Sclerotium rolfsii Sacc.) of capsicum which is also called as collar rot or southern blight is one of the serious diseases in capsicum that severely brings down the yield in all the major capsicum growing areas in Karnataka. Among the several management practices, managing the disease with fungicides is the most effective means. In the present investigation twelve fungicides that included three systemic, six combi products and three contact fungicides were evaluated against S. rolfsii in vitro. Among the fungicides, hexaconazole, difenoconazole, propiconazole, propiconazole + difenoconazole, tricyclazole + hexaconazole, hexaconazole + captan, zineb + hexaconazole and thiram were highly effective even at least concentration of 25 ppm tested and also in subsequent concentrations of 50 ppm, 100 ppm, 250 ppm, 500 ppm showing 100 per cent inhibition. Further, among the eight promising fungicides based on in vitro results, six fungicides were evaluated against stem rot of capsicum under polyhouse conditions. Among the treatments undertaken, propiconazole and difenoconazole each at 0.1 per cent were effective resulting in 97.05 per cent reduction in disease over control and can be concluded as promising fungicides against stem rot.

Morphological and Cultural Characterization of Sclerotium rolfsii Sacc on Chickpea and Its Management Using Combined Fungicide Molecules

“…The in vitro testing of fungicides gives valuable data on their ability to effectively combat a pathogen in the shortest period of time, and as a result, These results are in agreement with the findings of other studies [25][26][27] who reported that "the combo products containing triazoles viz., Avatar, Merger and Nativo were highly inhibitive to the growth of S. rolfsii". Similarly the studies by [28][29][30][31] who observed that "100 per cent inhibition of mycelial growth by these combi fungicides against S. rolfsii Sacc. from different crop system" [32].…”

In-vitro Assessment of Fungicides and pH Levels on the Mycelial Growth and Sclerotia Production of Sclerotium rolfsii Sacc. causing White Rot of Onion in Manipur

“…According to Mahato et al (2014 S. rolfsii and had no influence on mycelial growth. Arunasri et al (2011), Manu et al (2012, Deepthi (2014), Suneeta et al (2017), Shirsole et al (2019) and Sahana et al (2020). Sclerotium rolfsii grows in all pH tested, 4.0 to 7.0.…”