Integrated approaches for managing collar rot disease and increasing soybean yield

Rahman, Md. Tahmidur; Bhuiyan, Md .Khurshed Alam; Akanda, Md. Abdul Mannan; Khan, Md. Abu Ashraf; Karim, Md. Abdul; Hossain, Md. Mofazzal; Rubayet, Md. Tanbir

doi:10.21608/ejar.2023.201261.1390

Integrated approaches for managing collar rot disease and increasing soybean yield

Document Type : Original Article

Authors

¹ Department of Plant Pathology, Faculty of Agriculture, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh.

² Department of Agronomy, Faculty of Agriculture, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh.

³ Department of Horticulture, Faculty of Agriculture, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh.

10.21608/ejar.2023.201261.1390

Abstract

The goal of this study was to assess the effectiveness of utilizing a bio-agent in combination with a fungicide and an organic amendment to reduce collar rot disease of soybean caused by Sclerotium rolfsii. Before conducting field studies, in vitro tests were used to identify the most virulent S. rolfsii isolate, effective antagonistic isolate of Trichoderma harzianum, fungicide, and organic amendment. The SSC-1 isolate was identified as the test pathogen after seven S. rolfsii isolates were exposed to the pathogenicity test. The ISR-26 strain of T. harzianum was the most efficient of the 87 T. harzianum isolates which could inhibit the radial development of pathogen by 81.85%. The most effective seed-treating fungicide in the fungicidal assessment trial, Provax 200 was found at a moderate dosage (150 ppm), while Conza 5%EC required at 300 ppm to inhibit the radial growth of the S. rolfsii isolate SSC-1. The test pathogen's growth and development were stunted about 65.92% by mustard oil cake at a concentration of 3% which was the most effective organic amendment as compared to others. In the field trial, treatment T9 (pathogen inoculated soil+wheat grains colonized T. harzianum isolate ISR–26+organic amendment+fungicide treated seeds) was the most efficient in dropping seedling mortality (80.24%), disease incidence (86.06%), and disease severity (84.8%). This T9 treatment was the most effective procedure of collar rot disease control in soybean and it also resulted in a substantial increase in yield (355.32%). Growers of soybean around the world might be benefitted more from this holistic strategy.

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