Browsing by Author "Dibakar Ghosh"

Now showing 1 - 6 of 6

An integrated approach to weed management practices in direct-seeded rice under zero-tilled rice–wheat cropping system
(Taylor and Francis Ltd., 2017) Dibakar Ghosh; U.P. Singh; K. Brahmachari; N.K. Singh; Anupam Das
An increasing water crisis as well as shortage of farm labor farmers in many Asian regions is forcing a shift from puddled transplanted rice to direct-seeded rice. The weeds, however, are a major constraint to the production of direct-seeded rice. In this perspective, a field study was carried out to evaluate various pre- and post-emergence herbicides and different possible integrated weed management practices in zero-till direct-seeded rice. Weed infestation decreased the rice yield by near about 75%. Co-culture rice with Sesbania followed by (fb) pendimethalin fb 2,4-D effectively reduced the total weed population (65.1%) and biomass (86.7%) at 30 days after sowing (DAS). The lowest total weed dry biomass at 60 DAS was recorded from bispyribac-sodium+azimsulfuron-treated plot and such tank mix application of herbicide performed better against diverse weed flora as compared to a single herbicide. Higher yield and more profit from zero-till direct-seeded rice were obtained with the application of bispyribac-sodium+azimsulfuron herbicides as a tank mixture or an integrated approach through cowpea green-manuring fb 2,4-D+glyphosate fb bispyribac-sodium by effective management of versatile weed flora. © 2016 Informa UK Limited, trading as Taylor & Francis Group.
Efficacy of Seed Priming Technology in Ameliorating Metals and Metalloids Toxicity in Crops: Prospective and Issues
(Springer, 2025) Debojyoti Moulick; S. C. Santra; Arnab Majumdar; Anupam Das; Bhaben Chowardhara; Bedabrata Saha; Dibakar Ghosh; Jayjit Majumdar; Munish Kumar Upadhyay; Poonam Yadav; Sukamal K. Sarkar; S. Garai; Anannya Dhar; Saikat Dey; Sayanti Mandal; Shuvasish Choudhury; Binaya Kumar Pattnaik; Goutam Kumar Dash; Sai Krishna Repalli; Akbar Hossain
Seed priming technology (SP) is a practice (conducted prior to sowing) where seeds are treated with a wide range of seed priming agents (SPA) for a set time period followed by withdrawal. The efficacy of SP has been widely examined against various abiotic and biotic stressors with various crops in controlled field environmental conditions. Among the abiotic stressors, heavy metals and/or metalloids (HMs) are considered as a serious threat to sustainable agriculture. Compared with other stressors, the efficacy of SP in ameliorating HM-induced phytotoxicity and minimizing HMs content in edible parts are limited. However, there is a lack of a comprehensive study dedicated to HMs stress in wide range of crops. This review article employs a blend of bibliometric-based analysis (to assess global trends) followed by systematic evaluation of traditional (micronutrient, biomolecules, etc.) and nanomaterial (NMs)-based SPAs in ameliorating HMs-induced stress and accumulation in various crops. Our assessment suggests SPs as a suitable means to fill the vacuum that exists among the controlled environment and field condition, cost effective, easy remedial measure for HMs-induced stress. However, the need of in-depth (cellular and molecular level) as well as multi-location trials will definitely add to the current knowledge for development of effective HM stress resilience. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.
Emerging concern of nano-pollution in agro-ecosystem: Flip side of nanotechnology
(Elsevier Masson s.r.l., 2024) Debojyoti Moulick; Arnab Majumdar; Abir Choudhury; Anupam Das; Bhaben Chowardhara; Binaya Kumar Pattnaik; Goutam Kumar Dash; Kanu Murmu; Karma Landup Bhutia; Munish Kumar Upadhyay; Poonam Yadav; Pradeep Kumar Dubey; Ratul Nath; Sidhu Murmu; Soujanya Jana; Sukamal Sarkar; Sourav Garai; Dibakar Ghosh; Mousumi Mondal; Subhas Chandra Santra; Shuvasish Choudhury; Koushik Brahmachari; Akbar Hossain
Nanomaterials (NMs) have proven to be a game-changer in agriculture, showcasing their potential to boost plant growth and safeguarding crops. The agricultural sector has widely adopted NMs, benefiting from their small size, high surface area, and optical properties to augment crop productivity and provide protection against various stressors. This is attributed to their unique characteristics, contributing to their widespread use in agriculture. Human exposure from various components of agro-environmental sectors (soil, crops) NMs residues are likely to upsurge with exposure paths may stimulates bioaccumulation in food chain. With the aim to achieve sustainability, nanotechnology (NTs) do exhibit its potentials in various domains of agriculture also have its flip side too. In this review article we have opted a fusion approach using bibliometric based analysis of global research trend followed by a holistic assessment of pros and cons i.e. toxicological aspect too. Moreover, we have also tried to analyse the current scenario of policy associated with the application of NMs in agro-environment. © 2024 Elsevier Masson SAS
Mathematical model of COVID-19 with comorbidity and controlling using non-pharmaceutical interventions and vaccination
(Springer Science and Business Media B.V., 2021) Parthasakha Das; Ranjit Kumar Upadhyay; Arvind Kumar Misra; Fathalla A. Rihan; Pritha Das; Dibakar Ghosh
Pandemic is an unprecedented public health situation, especially for human beings with comorbidity. Vaccination and non-pharmaceutical interventions only remain extensive measures carrying a significant socioeconomic impact to defeating pandemic. Here, we formulate a mathematical model with comorbidity to study the transmission dynamics as well as an optimal control-based framework to diminish COVID-19. This encompasses modeling the dynamics of invaded population, parameter estimation of the model, study of qualitative dynamics, and optimal control problem for non-pharmaceutical interventions (NPIs) and vaccination events such that the cost of the combined measure is minimized. The investigation reveals that disease persists with the increase in exposed individuals having comorbidity in society. The extensive computational efforts show that mean fluctuations in the force of infection increase with corresponding entropy. This is a piece of evidence that the outbreak has reached a significant portion of the population. However, optimal control strategies with combined measures provide an assurance of effectively protecting our population from COVID-19 by minimizing social and economic costs. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
Selenium – An environmentally friendly micronutrient in agroecosystem in the modern era: An overview of 50-year findings
(Academic Press, 2024) Debojyoti Moulick; Arkabanee Mukherjee; Anupam Das; Anirban Roy; Arnab Majumdar; Anannya Dhar; Binaya Kumar Pattanaik; Bhaben Chowardhara; Dibakar Ghosh; Munish Kumar Upadhyay; Poonam Yadav; Swati Hazra; Sukamal Sarkar; Subrata Mahanta; S.C. Santra; Shuvasish Choudhury; Sagar Maitra; Udit Nandan Mishra; Karma L. Bhutia; Milan Skalicky; Oliver Obročník; Viliam Bárek; Marian Brestic; Akbar Hossain
Agricultural productivity is constantly being forced to maintain yield stability to feed the enormously growing world population. However, shrinking arable and nutrient-deprived soil and abiotic and biotic stressor (s) in different magnitudes put additional challenges to achieving global food security. Though well-defined, the concept of macro, micronutrients, and beneficial elements is from a plant nutritional perspective. Among various micronutrients, selenium (Se) is essential in small amounts for the life cycle of organisms, including crops. Selenium has the potential to improve soil health, leading to the improvement of productivity and crop quality. However, Se possesses an immense encouraging phenomenon when supplied within the threshold limit, also having wide variations. The supplementation of Se has exhibited promising outcomes in lessening biotic and abiotic stress in various crops. Besides, bulk form, nano-Se, and biogenic-Se also revealed some merits and limitations. Literature suggests that the possibilities of biogenic-Se in stress alleviation and fortifying foods are encouraging. In this article, apart from adopting a combination of a conventional extensive review of the literature and bibliometric analysis, the authors have assessed the journey of Se in the “soil to spoon” perspective in a diverse agroecosystem to highlight the research gap area. There is no doubt that the time has come to seriously consider the tag of beneficial elements associated with Se, especially in the drastic global climate change era. © 2023 The Authors
Weed management through herbicide application in direct-seeded rice and yield modeling by artificial neural network
(Ministerio de Agricultura Pesca y Alimentacion, 2016) Dibakar Ghosh; Uday P. Singh; Krishnendu Ray; Anupam Das
In direct seeded rice (DSR) cultivation, weed is the major constraint mainly due to absence of puddling in field. The yield loss due to weed interference is huge, may be up to 100%. In this perspective, the present experiment was conducted to study the efficacy of selected herbicides, and to predict the rice yield using artificial neural network (ANN) models. The dry weight and density of weeds were recorded at different growth stages and consequently herbicide efficacy was evaluated. Experimental results revealed that pre-emergence (PRE) herbicide effectively controlled the germination of grassy weeds. Application bispyribac-sodium as postemergence (POST) following PRE herbicides (clomazone or pendimethalin) or as tank-mixture with clomazone effectively reduced the density and biomass accumulation of diverse weed flora in DSR. Herbicidal treatments improved the plant height, yield attributes and grain yield (2.7 to 5.5 times) over weedy check. The sensitivity of the best ANN model clearly depicts that the weed control index (WCI) of herbicides was most important than their weed control efficiency (WCE). Besides, the early control of weeds is a better prescription to improve rice yield. Differences in sensitivity values of WCI and WCE across the crop growth stages also suggest that at 15, 30 and 60 days after sowing, herbicides most effectively controlled sedges, broad leaves and grasses, respectively. Based on the grain yield and herbicidal WCE, it can be concluded that the combined application of pendimethalin or clomazone as PRE followed by bispyribac-sodium as POST or tank-mixture of clomazone + bispyribac sodium can effectively control different weed flushes throughout the crop growth period in DSR. © 2016 INIA.