Unshackle Pseudomonas putida GN1 and organic amendments against root rot (Macrophomina phaseolina) and stem rot (Sclerotium rolfsii) control by plant growth promotion in groundnut

M Paramasivan; A K  Binodh; L Rajendran; R Ramjegathesh; P Indiragandhi; A Thangam; M Karthikeyan; I Johnson; J Sheela

doi:10.14719/pst.6499

Authors

M Paramasivan Regional Research Station, Tamil Nadu Agricultural University (TNAU), Vriddhachalam 606 001 Tamil Nadu, India https://orcid.org/0000-0001-7819-8756
A K Binodh Department of Plant Breeding and Genetics, TNAU, Coimbatore 641 003, Tamil Nadu, India https://orcid.org/0000-0002-1308-9679
L Rajendran Department of Plant Pathology, TNAU, Coimbatore 641 003, Tamil Nadu, India https://orcid.org/0000-0001-8840-7419
R Ramjegathesh V.O.C. Agricultural College and Research Institute, TNAU, Killikulam, Thoothukudi 628 252, Tamil Nadu, India https://orcid.org/0000-0003-0865-7245
P Indiragandhi Regional Research Station, Tamil Nadu Agricultural University (TNAU), Vriddhachalam 606 001 Tamil Nadu, India https://orcid.org/0000-0002-0252-7135
A Thangam Government Arts and Science College for Women, MU Alangulam, Tenkasi, Tamil Nadu, India https://orcid.org/0000-0001-8256-6064
M Karthikeyan Department of Plant Pathology, TNAU, Coimbatore 641 003, Tamil Nadu, India https://orcid.org/0000-0003-0816-4096
I Johnson Department of Plant Pathology, TNAU, Coimbatore 641 003, Tamil Nadu, India https://orcid.org/0000-0003-1631-9246
J Sheela https://orcid.org/0000-0003-2392-9990

DOI:

https://doi.org/10.14719/pst.6499

Keywords:

Pseudomonas putida, root rot, rooting pattern , stem rot

Abstract

The efficacy of Pseudomonas putida (GN1) and Burholderia cepacia (KKM1) as seed treatment and soil application along with neem cake against groundnut root rot and stem rot disease was evaluated under rainfed conditions during the years 2021, 2022 and 2023. The present study is to evaluate biocontrol agents and organic amendments against Macrophomina phaseolina and Sclerotium rolfsii in peanut. The result showed that neem cake (10 %) recorded the maximum inhibition of Macrophomona phaseolina (40.91 %) and S. rolfsii (45.45 %) under in vitro whereas neem cake combined with P. putida and B. cepacia as seed treatment 10 g/kg of seed and soil Application of P. putida @ 2.5 kg + Neem cake 150 kg/ha decreases the soil-borne diseases of root rot (71.70 %) and stem rot (64.88 %) and also increased the yield 2130.48 kg/ha with the cost-benefit ratio of 2.74 under rainfed field conditions comparing to other treatments. In addition, the same treatment increased the total root length (2110.41 mm), Root tips (573 Nos), forks (501 Nos), Maximum diameter (18.11 mm) and estimated volume (27170 cm3 ) when using BioVis PSM Root -Rhizoscanner.

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