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Integrated management of dry root rot of Arachis hypogaea caused by Rhizoctonia bataticola

DOI: 10.31830/2348-7542.2022.061    | Article Id: 061 | Page : 453-457
Citation :- Integrated management of dry root rot of Arachis hypogaea caused by Rhizoctonia bataticola. Res. Crop. 23: 453-457
Sindhu Keerthana, T. Srinivas, R. Sarada Jayalakshmi Devi, A. Sri Vidhya thumati28@gmail.com
Address : Department of Plant Pathology S. V. Agricultural College (ANGRAU), Tirupati, 517502, Andhra Pradesh, India; Krishi Vigyan Kendra, Banavasi, Kurnool, 518360, Andhra Pradesh, India; Acharya N. G. Ranga Agricultural University, Lam, Guntur, 522034, Andhra Pradesh, India; Department of Plant Pathology, S.V. Agricultural College, Tirupati, 517502, Andhra Pradesh, India; Acharya N. G. Ranga Agricultural University, Lam, Guntur, 522034, Andhra Pradesh, India; Department of Genetics and Plant Breeding, Institute of Frontier Technology, RARS, Tirupati, 517502, Andhra Pradesh, India; Acharya N. G. Ranga Agricultural University, Lam, 522034, Andhra Pradesh, India

Abstract

Groundnut a principal vegetable oilseed crop in India with about 85 percent area under rainfed conditions is prone to dry root rot causing considerable loss in the yield when left unmanaged. In order to find out an effective method of managing the disease, an experiment was conducted at Regional Agricultural Research Station, Tirupati during kharif 2019–20 as an integrated approach by combining the use of bio agents, organic amendments and fungicides. Native bacterial and fungal bio agents along with commercial formulations of Pseudomonas flourescens and T. harzianum, oil cakes and different fungicides were screened and tested for their efficacy against the pathogen under in vitro and field conditions. Experiment was laid out with the best performing bio agent, organic amendment and fungicide using single and combination treatments. Results revealed that, seed treatment with mancozeb @ 3g/kg and with commercial formulation of T. harzianum @ 5g/kg seed along with soil application of karanj cake @ 1.3 t/ha maintained its superiority over other treatments by recording the least PDI, maximum germination percentage (92.10%), root length (35.61 cm), shoot length (14.24 cm), number of pods per plant (26.97) and pod yield (3797.77 kg/ha) which proves the synergist effect of all the treatments viz., chemical, biological and organic amendment. Hence, integrated management of dry root rot combining chemical, biological and cultural practices effectively controls the disease besides enhancing the crop yields.

Keywords

Dry root rot fungicides groundnut organic amendments R. bataticola

References

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