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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP
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    Abstract - Issue Sep 2023, 44 (5)                                     Back


nstantaneous and historical temperature effects on a-pinene

Influence of cropping sequences on soil suppressive/conduciveness against Sclerotium rolfsii in

different agro-climatic zones of West Bengal, India

 

K. Sen1,2, S. Dutta2, S.K. Halder1*, B. Pati1, S. Goldar2, S. Patar2, D.R.S. Bharati2, R. Patsa2, A.K. Ghorai2, K. Sarker1,2, R. Kumar2,5, K. Ray2, T.R. Borah2,3, S.K. Ray2 and A.R. Barman2,4

 

1Department of Microbiology, Vidyasagar University, Midnapore-721 102, India

2Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur-741 252, India

3ICAR Research Complex for NEH Region, Umiam, Meghalaya-793 103, India

4Bidhan Chandra Krishi Viswavidyalaya, RRS (CSZ), Kakdwip, South 24 Parganas-743 347, India

5Department of Plant Pathology, M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakhemundi-761 211, India

 

*Corresponding Author Email : sumanmic85@gmail.com                    *ORCiD: https://orcid.org/0000-0002-4541-8369

 

Received: 18.07.2022                                                                                            Revised: 19.10.2022                                                                     Accepted: 03.04.2023

 

 

Abstract

Aim: To study the influence of different cropping sequences (CSs) on soil suppressive or conduciveness towards Sclerotium rolfsii in different agro-climatic zones (ACZs) of West Bengal, India.

Methodology: Farmer’s field surveys were conducted to explore the suppressive activity of various crop rhizosphere during each winter, October to January (2016-2019). The survey was done in 14 districts of five ACZs in West Bengal (India), and the total surveyed sample size was 511. The S. rolfsii disease incidence (DI%) data of Rabi crop in surveyed areas and sclerotial population, soil suppressive index, FDA hydrolysis, dehydrogenase activity and culturable microbial assay were performed.

Results: In this data set (n=511), the foremost soils belonged to no suppressive category (74.47%), followed by slight suppressive category (20.74%). Negligible number of soils belonged to moderate (0.39%) and strong suppressive (0.39%) category. The population of Pseudomonads was higher in both strong and moderate suppressive soil rather than slight and no suppressive soils. Culturable population of soil Pseudomonads, Bacillus and Actinomycetes varied in five different ACZs.

Interpretation: Paddy-brassica vegetables, paddy-maize and paddy-cucurbits vegetable-based CSs exhibited relatively high soil uppressiveness whereas paddy-legumes, jute-paddy-legume vegetables and pulses based CSs showed high soil conduciveness towards S. rolfsii. Soil microbial influences on crop rhizosphere along with “crop rotation effect” was the key reason for the disease suppressive activity.

Key words: Agro-climatic zones, Crop rotation, FDA hydrolysis, Rhizosphere, S. rolfsii, Suppressive soil

 

 

 

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