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165 results on '"Kanatas, Panagiotis"'

4. A Preliminary Assessment of the Combined Effects of a Novel Microbial Biostimulant Product, Fertilizers, and Herbicides on the Growth and Yield of Field Crops in Greece.

Author

Gazoulis, Ioannis, Zannopoulos, Stavros, Kokkini, Metaxia, Antonopoulos, Nikolaos, Kanatas, Panagiotis, Kanetsi, Marianna, Demirtzoglou, Triantafyllia, and Travlos, Ilias

Subjects
RAPESEED, CROP yields, MICROBIAL products, FIELD research, HERBICIDES
Abstract

Field trials were conducted (2022–2023) in a randomized complete block design to evaluate the combined use of a microbial biostimulant, P-K Stim, which contains phosphate and potassium solubilizing bacteria (109 Colony Forming Units mL−1), various fertilization rates, and herbicide use on weed growth and the productivity of alfalfa (Medicago sativa L.), oilseed rape (Brassica napus L.), and durum wheat (Triticum durum Desf.). The following treatment list was the same on all trial fields: (1) 100% basal fertilization (100N), (2) 20% basal fertilization and application of microbial biostimulant P-K Stim (20N + PK), (3) 100% basal fertilization and post-emergence herbicide treatment (100N + H), (4) 20% basal fertilization together with the application of P-K Stim and a post-emergence herbicide treatment (20N + PK + H), and (5) 50% basal fertilization together with the application of P-K Stim and a post-emergence herbicide treatment (50N + PK + H). The combined use of fertilization, biostimulants, and herbicides significantly affected crop yield, its components and weed biomass (p ≤ 0.05). The concentrations for potassium and phosphorus were higher in the 20N + PK + H and 50N + PK + H treatments for all crops compared to other treatments. Nutrient concentrations were remarkably high across all crops, closely approximating the values of the recommended nitrogen fertilization. Crop yield and its components were positively influenced by the 20N + PK + H and 50N + PK + H treatments. Weed biomass was significantly lower in these plots compared to other treatments. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Agroecology and beyond: enhancing ecosystem services provided by natural vegetation and inventing "service weeds".

Author

Gazoulis, Ioannis, Kanatas, Panagiotis, Zannopoulos, Stavros, Kokkini, Metaxia, Kontogeorgou, Vasiliki, Antonopoulos, Nikolaos, and Travlos, Ilias

Subjects
ECOSYSTEM services, AGRICULTURAL ecology, WEEDS, MOWING, BOTANY
Abstract

This article explores the potential benefits of weeds in agricultural ecosystems and introduces the concept of "service weeds" that can provide ecosystem services without harming crops. It highlights the importance of quantifying and enhancing these services and proposes a five-step approach to integrating weeds into agricultural practices. The document emphasizes the need for collaboration with farmers and stakeholders, as well as training and technical support. It acknowledges the challenges associated with promoting weeds as ecosystem service providers but suggests that further research and policy initiatives are needed to explore their potential. The document also provides a list of references from various scientific articles on related topics. [Extracted from the article]

Published
2024
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6. The Potential of Three Summer Legume Cover Crops to Suppress Weeds and Provide Ecosystem Services—A Review.

Author

Zannopoulos, Stavros, Gazoulis, Ioannis, Kokkini, Metaxia, Antonopoulos, Nikolaos, Kanatas, Panagiotis, Kanetsi, Marianna, and Travlos, Ilias

Subjects
COVER crops, ECOSYSTEM services, WEEDS, PEST control, COWPEA, LEGUMES
Abstract

Recently, there has been growing interest in the use of summer cover crops that can be grown during summer fallow periods of crop rotation. This study evaluates the potential of sunn hemp (Crotalaria juncea L.), velvetbean [Mucuna pruriens (L.) DC.] and cowpea [Vigna unguiculata (L.) Walp.]. as three annual legumes summer cover crops. The main objective of this review was to conduct global research comparing these summer cover crops to investigate the benefits, challenges, and trade-offs among ecosystems services when implementing these summer cover crops. In European agriculture, there are three main windows in crop rotation when these summer legumes can be grown: Around mid-spring after winter fallow, early summer after harvest of a winter crop, and mid- to late summer after harvest of an early-season crop. All three legumes can suppress weeds while they are actively growing. After termination, their mulch can create unfavorable conditions for weed emergence. Sunn hemp and velvetbean cover crops can cause a reduction in weed biomass of more than 50%. In addition to their ability to suppress weeds, sunn hemp, velvetbean, and cowpea provide a variety of ecosystem services, such as improving soil health, quality, and fertility, controlling pests, and sequestering carbon. The review highlights their promising role in weed suppression and their contribution to sustainable agricultural practices. However, further research is needed to evaluate their performance in weed management and their environmental impact in field trials under different soil-climatic conditions, as cover cropping is an effective practice but highly context-specific. [ABSTRACT FROM AUTHOR]

Published
2024
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7. The Use of Isoflavones as Lung Cancer Chemoprevention Agents and their Implications in Treatment through Radio Sensitization

Author

Athanasiou, Efstratios, primary, Papageorgiou, Savvas, additional, Dafni, Marianna Foteini, additional, Kelesis, Ioannis, additional, Vasileiou, Maria, additional, Tatsiou, Theodora, additional, Kouveloglou, Vasiliki, additional, Kanatas, Panagiotis, additional, Stouras, Ioannis, additional, Gatsis, Athanasios, additional, Agiassoti, Vasiliki Taxiarchoula, additional, Nasimpian, Petros, additional, Dafnoudis, Dimitrios, additional, Degaita, Kyriaki, additional, Verras, Georgios Ioannis, additional, Alexiou, Athanasios, additional, Papadakis, Marios, additional, and Kamal, Mohammad Amjad, additional

Published
2024
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12. Quick In Situ Evaluation of Herbicide Efficacy in Maize (Zea mays L.) Crop.

Author

Tsekoura, Anastasia, Gazoulis, Ioannis, Antonopoulos, Nikolaos, Kousta, Angeliki, Kanatas, Panagiotis, and Travlos, Ilias

Subjects
HERBICIDES, CORN, NORMALIZED difference vegetation index, HERBICIDE application, CROP yields, WEED control
Abstract

Sustainable crop and weed management is among the crucial challenges in the era of the EU Green Deal. The main objective of the present study was to apply an innovative approach for the rapid assessment of herbicide efficacy in maize (Zea mays) crop in four different trials during two years. Weed NDVI values were recorded at two weeks after treatment, while weed biomass and crop yield were also measured. The results revealed significant differences between the several treatments. In many cases, significant effects of herbicide application on the normalized difference vegetation index (NDVI) values and weed biomass were noticed at two weeks after treatment. Moreover, the mixture nicosulfuron + rimsulfuron + mesotrione resulted in high efficacy on the crop yield of all fields. Consequently, our approach can allow for an early prediction of the real field efficacy of several herbicides and thus act as an alert for the farmers in order to choose the most efficient herbicide, avoid applications of low efficacy and reduce the herbicide inputs. [ABSTRACT FROM AUTHOR]

Published
2024
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16. Amaranthus palmeri S. Watson: A new threat to agriculture in Europe and the Mediterranean region

Author

Matzrafi, Maor, primary, Scarabel, Laura, additional, Milani, Andrea, additional, Iamonico, Duilio, additional, Torra, Joel, additional, Recasens, Jordi, additional, Montull, José María, additional, Llenes, Josep Maria, additional, Gazoulis, Ioannis, additional, Tataridas, Alexandros, additional, Rubin, Baruch, additional, Pardo, Gabriel, additional, Cirujeda, Alicia, additional, Marí, Ana Isabel, additional, Mennan, Husrev, additional, Kanatas, Panagiotis, additional, Dogan, Mehmet Nedim, additional, Beffa, Roland, additional, and Travlos, Ilias, additional

Published
2023
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18. Seed Germination and Plant Growth under Drought Stress of Herbicide-Resistant and Herbicide-Susceptible Biotypes of Conyza Species and Smart Farming Approaches

Author

Kanatas, Panagiotis, primary, Ntaoulis, Vasilis, additional, Gazoulis, Ioannis, additional, Andreou, Athanasios, additional, Danaskos, Marios, additional, Mpounanos, Dimitrios, additional, Karanika, Eleni-Anna, additional, Papastylianou, Panayiota, additional, and Travlos, Ilias, additional

Published
2023
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20. Ecologically Based Weed Management: Concepts, Challenges, and Limitations - 5. Chapter: The Underestimated Role of Cultural Practices in Ecologically Based Weed Management Approaches

Author

Travlos, Ilias, Travlos, Ilias, GAZOULIS, IOANNIS, Simic, Milena, Kanatas, Panagiotis, Travlos, Ilias, Travlos, Ilias, GAZOULIS, IOANNIS, Simic, Milena, and Kanatas, Panagiotis

Abstract

Globally, the overreliance of agriculture on herbicides has created environmental, human health, and herbicide-resistance concerns. There is an urgent need to develop alternative, ecologically based weed management systems based on the use of cultural practices that reduce the emergence and growth of weeds in the field. Although not widely adopted by farmers, the current chapter highlights that the role of cultural practices in developing of sustainable ecologically based weed management systems should not be further underestimated. Concerning crop diversification practices, weeds are subjected to diverse agronomic practices becoming less adaptable and competitive in crop rotation systems. Crop selection must follow specific criteria to facilitate successful weed management. Including a cover crop in the rotation is another beneficial practice to further suppress weed emergence and seed production. Moreover, intercropping promotes more efficient and complementary resource use from crop mixtures and reduces the availability of resources to weeds. The selection of competitive cultivars and hybrids is a major agronomic practice to achieve higher levels of weed suppression. The use of increased seeding rates and planting in narrow row spacing increase crop populations and, thus, improve crop competitiveness against weeds. Optimal sowing dates, in relation to weed emergence, and optimal resource management should also be considered as important components of ecologically based weed management systems. Research shows that combinations among different cultural practices may facilitate reductions to weed emergence and weed seed production and could lead to higher crop yields

Published
2023

25. The Association Between the Risk of Breast Cancer and Epigallocatechin- 3-Gallate Intake: A Literature Review of a Potential Chemopreventive Agent

Author

Athanasiou, Efstratios, primary, Verras, Georgios-Ioannis, additional, Papageorgiou, Savvas, additional, Kelesis, Ioannis, additional, Gatsis, Athanasios, additional, Karaoulani, Christina, additional, Stouras, Ioannis, additional, Kanatas, Panagiotis, additional, Saitani, Elmina-Marina, additional, Oikonomou, Maria-Eleni, additional, Vlassi, Danae-Anastasia, additional, Vasileiou, Maria, additional, Tsagkaris, Christos, additional, Alexiou, Athanasios, additional, and Kamal, Mohammad Amjad, additional

Published
2022
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32. Mini-review: The role of crop rotation, intercropping, sowing dates and increased crop density towards a sustainable crop and weed management in arable crops

Author

Kanatas, Panagiotis

Subjects
lcsh:Agriculture, crop rotation, articles, article, lcsh:S, sustainability, intercropping, weed management
Abstract

Saabunud / Received 17.05.2020 ; Aktsepteeritud / Accepted 29.05.2020 ; Avaldatud veebis / Published online 30.05.2020 ; Vastutav autor / Corresponding author: Panagiotis Kanatas e-mail: pakanatas@gmail.com The extended and in many cases unjustified use of herbicides has resulted in herbicide resistance development and serious environmental concerns. Therefore, the need for implementation and wider adoption of several agronomic and cultural practices is imperative. Ecologically-based crop management practices like crop rotation, intercropping, delay of sowing date and increased crop density can be also the basis for effective and sustainable weed management. In the present review, several cases are presented and the key points of each method are discussed. Special attention is given to the fact that the efficacy of each practice is depended on the specific soil and climatic conditions along with the field history of each site and crop. Alternative methods of weed management should be further studied and optimized to include them in both organic and conventional production systems and ensure the sustainability of agroecosystems.

Published
2020

34. False Seedbed for Agroecological Weed Management in Forage Cereal–Legume Intercrops and Monocultures in Greece.

Author

Gazoulis, Ioannis, Kanatas, Panagiotis, Antonopoulos, Nikolaos, Tataridas, Alexandros, and Travlos, Ilias

Subjects
*CATCH crops, *WEED control, *CROP yields, *CLOVER, *CROPPING systems, *ITALIAN ryegrass, *LEGUMES, *INTERCROPPING
Abstract

Intercropping cereals with legumes is a widely used agronomic practice to improve forage yield and quality in forage cropping systems. The main objective of the present study was to investigate the potential of a false seedbed to reduce weed pressure in intercrops and monocultures of annual ryegrass and berseem clover during the 2020–2021 and 2021–2022 growing seasons in western Greece. A split-plot randomized complete block design with four replications was set up. Seedbed manipulations assigned to the main plots included: normal seedbed preparation (NSB) and seeding, and two different false seedbeds. In the first (FSB 1) and second false seedbeds (FSB 2), weeds were controlled by shallow tillage at 1 and 2 weeks, respectively, after the first tillage and immediately before crop sowing. Forages were subplots of berseem clover (BCM) and annual ryegrass monocultures (ARM) and three intercrops with BCM:ARM ratios of 75:25 (ARBC 1), 50:50 (ARBC 2), and 25:75 (ARBC 3). FSB 1 reduced weed biomass by 27% and 34% compared to NSB in 2020–2021 and 2021–2022, respectively (p ≤ 0.001). FSB 2 improved forage yield by 9% and 14% in 2020–2021 and 2021–2022, respectively, compared to FSB 1. Compared to NSB, FSB 2 also increased forage yield by 11% in 2020–2021 and 17% in 2021–2022. Berseem clover biomass was higher in FSB 2 than in NSB main plots in both years. In the first harvest, ARBC 3 was the most weed-suppressive intercrop, which also provided the highest forage yield in both the first and second harvests of both years, followed by ARM and ARBC 2. In the second harvest, forage yield was 11% and 12% higher in ARBC 3 subplots than in ARBC 1 and BCM subplots, respectively. Similar results were obtained for cumulative forage yield from two harvests. Further research is needed to evaluate other alternative practices for agroecological weed management in low-input forage production systems in the Mediterranean region. [ABSTRACT FROM AUTHOR]

Published
2023
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37. B-Cell-Directed Therapies: A New Era in Multiple Sclerosis Treatment

Author

Kanatas, Panagiotis, Stouras, Ioannis, Stefanis, Leonidas, and Stathopoulos, Panos

Abstract

ABSTRACT:Multiple sclerosis (MS) is a chronic autoimmune demyelinating disease of the central nervous system (CNS) that often progresses to severe disability. Previous studies have highlighted the role of T cells in disease pathophysiology; however, the success of B-cell-targeted therapies has led to an increased interest in how B cells contribute to disease immunopathology. In this review, we summarize evidence of B-cell involvement in MS disease mechanisms, starting with pathology and moving on to review aspects of B cell immunobiology potentially relevant to MS. We describe current theories of critical B cell contributions to the inflammatory CNS milieu in MS, namely (i) production of autoantibodies, (ii) antigen presentation, (iii) production of proinflammatory cytokines (bystander activation), and (iv) EBV involvement. In the second part of the review, we summarize medications that have targeted B cells in patients with MS and their current position in the therapeutic armamentarium based on clinical trials and real-world data. Covered therapeutic strategies include the targeting of surface molecules such as CD20 (rituximab, ocrelizumab, ofatumumab, ublituximab) and CD19 (inebilizumab), and molecules necessary for B-cell activation such as B cell activating factor (BAFF) (belimumab) and Bruton’s Tyrosine Kinase (BTK) (evobrutinib). We finally discuss the use of B-cell-targeted therapeutics in pregnancy.

Published
2023
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