Academic literature on the topic 'Bio-control agent'

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Journal articles on the topic "Bio-control agent"

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Sharma, Nisha, and Baljeet Singh Saharan. "Bacillus thuringiensis SNKr10, As Bio-Control Agent." International Journal of Scientific Engineering and Research 5, no. 7 (2017): 186–94. https://doi.org/10.70729/ijser171650.

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Lau, H. Y. K., V. W. K. Wong, and A. W. Y. Ko. "A BIO-INSPIRED MULTI-AGENT CONTROL FRAMEWORK." IFAC Proceedings Volumes 38, no. 1 (2005): 1–6. http://dx.doi.org/10.3182/20050703-6-cz-1902.01078.

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Manpreet, kour, and Kaur Lovepreet. "Trichoderma as a bio-control agent- A review." Canadian Journal of Agricultural and Applied Sciences 2, no. 1 (2022): 60–67. https://doi.org/10.5281/zenodo.6585426.

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Trichoderma spp. is free living filamentous fungi. They are cosmopolitan and versatile in nature. They have the potential to produce several enzymes that can degrade the cell wall materials. Also, they release a number of fungi toxic substances that can inhibit the growth of the fungal pathogens. Many mechanisms have been described on how Trichoderma exert beneficial effects on plants as a bio-control agent. But due to its versatile nature, its potential cannot be explored to its full extent. The fungus is also a decomposer of cellulosic waste materials. Recent discoveries show that the fungi not only act as biocontrol agents, but also stimulate plant resistance, and plant growth and development resulting in an increase in crop production. The biocontrol activity involving mycoparasitism, antibiotics and competition for nutrients, also induces defence responses or systemic resistance responses in plants. These responses are an important part of Trichoderma in biocontrol program. Trichoderma spp. has been widely used in agricultural applications due to its well known biological control mechanism. The usage of this microbial inoculant in Trichoderma-based products attracts the attention of researchers to discover more on other potential benefits of Trichoderma spp. 
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Puyam, Anita. "Advent of Trichoderma as a bio-control agent- A review." Journal of Applied and Natural Science 8, no. 2 (2016): 1100–1109. http://dx.doi.org/10.31018/jans.v8i2.927.

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Trichoderma spp are free living filamentous fungi. They are cosmopolitan and versatile in nature. They have the potential to produce several enzymes that can degrade the cell wall materials. Also, they release a number of fungi toxic substances that can inhibit the growth of the fungal pathogens. Many mechanisms have been described on how Trichoderma exert beneficial effects on plants as a bio-control agent. But due to its versatile nature, its potential cannot be explored to its full extent. And it is a developing science in the field of bio-control with its new discoveries adding to the usefulness of the fungi as a bio-control agent. Its development as a bio-control agent passes through many phases and each phase adding novel ideas that will help in the development of an efficient bio-agent which in turn will help in the crop improvement and disease management. The studies on their various aspects responsible for bio-control will open a flood gate to the development of Trichoderma as an efficient and reliable bio-agent and provide a better scope for implementation in crop and disease management. The in vitro antagonistic activity of Trichoderma viride against phytopathogens (Sclerotium rolfsii, Fusarium oxysporum f.s.p. ciceri, Fusarium oxysporum f.s.p. udum) was studied and it was found to be potentially effective against F. oxysporum f.s.p. ciceri followed by F. oxysporum f.s.p. udum and Sclerotium rolfsii.
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Kaur, Manpreet, and Lovepreet Kaur. "Trichoderma as a Bio-Control Agent- A Review." International Journal of Current Microbiology and Applied Sciences 11, no. 6 (2022): 103–8. http://dx.doi.org/10.20546/ijcmas.2022.1106.012.

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Trichoderma spp. is free living filamentous fungi. They are cosmopolitan and versatile in nature. They have the potential to produce several enzymes that can degrade the cell wall materials. Also, they release a number of fungi toxic substances that can inhibit the growth of the fungal pathogens. Many mechanisms have been described on how Trichoderma exert beneficial effects on plants as a bio-control agent. But due to its versatile nature, its potential cannot be explored to its full extent. The fungus is also a decomposer of cellulosic waste materials. Recent discoveries show that the fungi not only act as biocontrol agents, but also stimulate plant resistance, and plant growth and development resulting in an increase in crop production. The biocontrol activity involving mycoparasitism, antibiotics and competition for nutrients, also induces defence responses or systemic resistance responses in plants. These responses are an important part of Trichoderma in biocontrol program. Trichoderma spp. has been widely used in agricultural applications due to its well known biological control mechanism. The usage of this microbial inoculant in Trichoderma-based products attracts the attention of researchers to discover more on other potential benefits of Trichoderma spp.
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Shravani, Vyamasani, and Uma Shankar Singh. "Investigation on Management of Root-Knot Nematode, Meloidogyne incognita through Soil Application of Bio-control Agents in Field Pea." International Journal of Plant & Soil Science 35, no. 17 (2023): 504–13. http://dx.doi.org/10.9734/ijpss/2023/v35i173238.

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The pot experiment was conducted at AICRP on vegetables, Pusa farm, Dr. Rajendra Prasad Central Agricultural University during 2020-21. The bio-control agents viz. Glomus fasciculatum (85-90 spores/g), Trichoderma harzianum 1.0% WP (2×106 cfu/g), Pseudomonas fluorescens 1.0% WP (1×108 cfu/g), Purpureocillium lilacinum 1.0% WP (2×106 cfu/g) either singly or in combined application shown significant improvement in plant growth and development and in declining nematode population. The combined application of P. fluorescens 1.0% WP (1×108 cfug-1) and P. lilacinum 1.0% WP (2×106 cfug-1) when applied 10g per pot each is efficient in improving plant growth and on other hand, plants treated with Cartap hydrochloride 4G (5g per pot) had the lowest nematode population, galls per plant, and Reproduction factor (Rf). P. lilacinum 1.0% WP (2×106 cfu/g) demonstrated promising effects in plants when just single bio-control agent i.e., 10g/pot was used. This study discovered that utilizing a mixture of bio-control agents was more effective than using bio-control agents alone in reducing the population of M. incognita. According to the study, bio-control agents had the same effects as Cartap hydrochloride 4G. As a result, bio-control agents can be used instead of nematicides.
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Chanda, Dhritiman, and Mursida Khatun. "Study on the Effect of Some Biocontrol Agent in Grey Blight of Tea." Ecology, Environment and Conservation 30, no. 04 (2024): 1578–82. https://doi.org/10.53550/eec.2024.v30i04.019.

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Tea plantation is covered by 434,000 hectares of land, which is further divided into two distinct regions - the North Indian tea belt and the South Indian tea belt. North-East India produces 75% of the total Indian tea. Present study is carried out to understand the various agro-climatic conditions of Bramhaputra valley like temperature, humidity, rainfall etc which are responsible for occurrence of various diseases in tea plant. The bio control agents are eco-friendly to control the plant diseases with aim of developing a sustainable system in agriculture. It involves in the mechanism of interaction among the antagonists and pathogens, which aid in selection and manipulation to develop an effective control system. It provides protection to the plant throughout its cultivation period and proliferates rapidly in soil and leaves no residue. Tea plants are challenged by several root, stem and foliar diseases. Fungi possess a number of characteristics that make them potentially ideal bio control agents. They can germinate to grow and control the target population there by making continual re-inoculation with the bio control agent. The preliminary investigation reflects the growth of Pstalotiopsis theaeis controlled by the isolated bacteria which could be a great potential biocontrol agent for the control of various diseases of tea in this region.
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Hanson, James R. "The chemistry of the Bio-Control Agent, Trichoderma Harzianum." Science Progress 88, no. 4 (2005): 237–48. http://dx.doi.org/10.3184/003685005783238372.

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Mishra, R. P., Manjul Pandey, and Mukesh Srivastava. "Morphological and Physiological Analysis of Bio-Control Agent (Trichoderma viride)." International Journal of Current Microbiology and Applied Sciences 7, no. 05 (2018): 1414–20. http://dx.doi.org/10.20546/ijcmas.2018.705.168.

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Odedina, Grace, Kitiya Vongkamjan, and Supayang Voravuthikunchai. "Potential Bio-Control Agent from Rhodomyrtus tomentosa against Listeria monocytogenes." Nutrients 7, no. 9 (2015): 7451–68. http://dx.doi.org/10.3390/nu7095346.

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Dissertations / Theses on the topic "Bio-control agent"

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Stewart, Thomas E. "The Grass Seed Pathogen Pyrenophora semeniperda as a Biocontrol Agent for Annual Brome Grasses." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/2267.

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Bromus tectorum and other annual brome grasses have invaded many ecosystems of the western United States, and because of an annual-grass influenced alteration of the natural fire cycle on arid western range lands near monocultures are created and conditions in which the native vegetation cannot compete are established. Each year thousands of hectares become near monocultures of annual brome grasses. Pyrenophora semeniperda, a generalist seed pathogen of annual grasses, shows major potential as a possible mycoherbicide that could help in reducing the monocultures created by annual grasses. The purpose of this research was to identify the requirements for isolating cultures of P. semeniperda, search for a hypervirulent strain, and evaluate its effect in the field. The techniques for isolating the fungus have evolved and become more efficient. The first two years of working with P. semeniperda resulted in 11 isolates. During the third year of this study, we developed a single spore isolation technique that resulted in 480 additional isolates. Virulence screening resulted in detection of a range of isolate ability to kill non-dormant B. tectorum seeds. Ninety-two isolates represented a range of virulence from 0-44%. The variation in virulence was expressed mostly within populations rather than between populations. Similarly, virulence varied significantly within Internal Transcribed Spacer (ITS) genotypes and habitats but not between them. When conidial inoculum was applied in the field there was no observed difference in disease incidence between different levels of inoculum. This is thought to have been due to applying the inoculum under conditions in which most in situ seeds were infected and killed by already high field inoculum loads. While additional field trials are needed to optimize the inoculum effectiveness, the overall results of this research provide a good foundation for using P. semeniperda as a biological control for seed banks of annual brome grasses.
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Musyoki, Mary Kamaa [Verfasser], and Georg [Akademischer Betreuer] Cadisch. "Impacts of the fungal bio-control agent Fusarium oxysporum f.sp. strigae on plant beneficial microbial communities in the maize rhizosphere / Mary Kamaa Musyoki ; Betreuer: Georg Cadisch." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2016. http://d-nb.info/111579499X/34.

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Hamdan, Abdul-Jalil Salem Abdul-Hamid. "Biological and ecological studies on the predatory bug, Macrolophus caliginosus Wagner (Heteroptera: miridae) as a bio-control agent against the greenhouse whitefly, Trialeurodes vaporariorum Westwood (Homoptera: Aleyrodidae)." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265808.

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Hamilton, Amanda Jane. "Discovery and development of new phylloplane bio control agents to control insect pests." Thesis, University of Reading, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.701806.

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Aphids cause considerable harm to a variety of crops each year due to damage from feeding and the transmission of viruses. Effective, conventional pesticides that are authorised for use are in continuous decline; simultaneously many of the current biological pesticides fail to meet required efficiency. Increasing demands for improved food security mean that a solution for this problem is needed. Plant surfaces are well known to provide a niche for many bacteria. Some species of bacteria possess pathogenic qualities and are known to kill or incapacitate insects. Therefore there is the potential for the discovery of a direct bacterial application, or the opportunity to manipulate the crop environment in order to encourage the colonisation of these beneficial bacteria. In this project we aim to identify bacteria from plants and screen them for toxicity against aphids and their relatives. Investigations will be carried out into their host specificity, methods of pathogenicity, and potential application methods, with the hope of identifying suitable bacteria for use as a pesticide.
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Schäckermann, Jessica Verfasser], and Alexandra-Maria [Akademischer Betreuer] [Klein. "Vertebrates and insects as pest and bio-control agents in agricultural landscapes of the Judean Foothills in Israel / Jessica Schäckermann. Betreuer: Alexandra-Maria Klein." Lüneburg : Universitätsbibliothek der Leuphana Universität Lüneburg, 2015. http://d-nb.info/1076911390/34.

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Feng, Xianyong. "A Bio-Inspired Multi-Agent System Framework for Real-Time Load Management in All-Electric Ship Power Systems." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11031.

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All-electric ship power systems have limited generation capacity and finite rotating inertia compared with large power systems. Moreover, all-electric ship power systems include large portions of nonlinear loads and dynamic loads relative to the total power capacity, which may significantly reduce the stability margin. Pulse loads and other high-energy weapon loads in the system draw a large amount of power intermittently, which may cause significant frequency and voltage oscillations in the system. Thus, an effective real-time load management technique is needed to dynamically balance the load and generation to operate the system normally. Multi-agent systems, inspired by biological phenomena, aim to cooperatively achieve system objectives that are difficult to reach by a single agent or centralized controller. Since power systems include various electrical components with different dynamical systems, conventional homogeneous multi-agent system cooperative controllers have difficulties solving the real-time load management problem with heterogeneous agents. In this dissertation, a novel heterogeneous multi-agent system cooperative control methodology is presented based on artificial potential functions and reduced-order agent models to cooperatively achieve real-time load management for all-electric ship power systems. The technique integrates high-order system dynamics and various kinds of operational constraints into the multi-agent system, which improves the accuracy of the cooperative controller. The multi-agent system includes a MVAC multiagent system and a DC zone multi-agent, which are coordinated by an AC-DC communication agent. The developed multi-agent system framework and the notional all-electric ship power system model were simulated in PSCAD software. Case studies and performance analysis of the MVAC multi-agent system and the DC zone multi-agent system were performed. The simulation results indicated that propulsion loads and pulse loads can be successfully coordinated to reduce the impact of pulse loads on the power quality of all-electric ship power systems. Further, the switch status or power set-point of loads in DC zones can be optimally determined to dynamically balance the generation and load while satisfying the operational constraints of the system and considering load priorities. The method has great potential to be extended to other isolated power systems, such as microgrids.
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Sinia, Alice. "Evaluation of the Fungi Beauveria bassiana, Metarhizium anisopliae, and Clonostachys rosea as Bio-control Agents against the Honey Bee Parasitic Mite, Varroa destructor." Thesis, 2013. http://hdl.handle.net/10214/7457.

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Laboratory bioassay was used to determine the pathogenicity of nine isolates of fungi of the genera Metarhizium, Beauveria and Clonostachys to the parasitic mite, Varroa destructor. All nine isolates were pathogenic to V. destructor with Metarhizuim anisopliae UAMH 9198, Clonostachys rosea UAMH 9161 and Beauveria bassiana GHA being the most pathogenic within their respective species. Metarhizium anisopliae UAMH 9198 was more lethal to V. destructor than B. bassiana GHA and C. rosea UAMH 9161 with LC50 values of 1.6 x 10(5), 9.6 x 10(6) and 5.4 x 10(6) conidia/mL, respectively. Metarhizium anisopliae and B. bassiana significantly affected brood and adult honey bee survivorship and their immune responses. They were lethal to the bees with LC50s of 3.70 x 10(6) and 2.62 x 10()5 conidia/mL, respectively. The effect of temperature and thymol on conidia germination, production and colony growth of the fungal isolates was determined. Temperature significantly affected conidia germination, production and colony growth (P < 0.05) but thymol did not. Efficacy of the two most promising isolates (M. anisopliae UAMH 9198 and B. bassiana GHA) as potential bio-control agents against V. destructor in hives was evaluated. Fungal inocula were applied as dry formulation, with corn flour as carrier, using dispenser tray and dusting applications. Treatments were either applied alone or in combination with thymol to determine any synergistic effects. All treatments significantly increased mite mortality (P < 0.05), however, the mite control efficacy varied between fungal treatments and application methods. Combined treatments of fungi and thymol caused significantly higher mite mortality than single fungal treatments, which showed control levels of ≤61%. Significant differences in mite mortality were found between the two delivery methods with the differences depending on the fungal isolate. The results suggest that M. anisopliae UAMH 9198 would be a more effective bio-control agent for the management of V. destructor in honey bee colonies than the other isolates tested when dispensed continuously in hives using delivery methods such as a dispenser tray. However, future research is needed to improve delivery methods and investigate the effect of carriers used in the formulation on the efficacy of such entomopathogenic fungi.<br>Ontario Ministry of Agriculture and Food (OMAF), University of Guelph
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Books on the topic "Bio-control agent"

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Mitra, Debasis, Sergio de los Santos Villalobos, Anju Rani, Beatriz Elena Guerra Sierra, and Snežana Andjelković, eds. Bio-control Agents for Sustainable Agriculture. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3232-9.

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Book chapters on the topic "Bio-control agent"

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Kamboj, Neha, Priya Chugh, W. P. T. Wijenayake, Debasis Mitra, P. Panneerselvam, and Rahul Kumar. "Multifunctionality and Diversity of Antagonistic Potential Fungi as Biocontrol Agent." In Bio-control Agents for Sustainable Agriculture. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3232-9_9.

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Samal, Swarnmala, Rahul Kumar, Madhu Thapliyal, et al. "Insight into an Effective Development of Biocontrol Agent Formulation for Commercial Production." In Bio-control Agents for Sustainable Agriculture. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3232-9_16.

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Afaq, Uzma, and Omkar. "Weed Bio-Control Agents." In Insect Predators in Pest Management. CRC Press, 2023. http://dx.doi.org/10.1201/9781003370864-12.

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Barrera, Roberto. "6. Dengue Vector Control." In Surveillance and Control of Dengue Vectors in the United States and Territories. Open Book Publishers, 2025. https://doi.org/10.11647/obp.0472.06.

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Vector control is implemented in several situations: to eliminate a dengue vector species that has invaded a new area and prevent its spread; to contain an ATV that may spread following its introduction to an area (through travel, for example); to prevent outbreaks in regions where dengue vectors are already established; and to manage impending or declared dengue epidemics. Effective vector control requires an integrated vector management programme. This programme trains vector control personnel, implements vector control activities, maintains and analyses data, produces reports, and is responsible for the efficacy of these activities. It also coordinates inter-governmental and agency collaboration, maintains liaisons with nongovernmental organizations, recommends policies and legislation, and develops educational materials for the public. The programme should be directed by a doctoral-level professional or somebody with equivalent experience (entomologist/biologist/ecologist), with the capacity to manage all aspects of the programme whilst supported by a high-level administrator. The programme should have doctoral and master-level personnel responsible for training control personnel, supervising control activities in the field, and conducting operational research and evaluation activities, such as testing novel vector control tools. Field personnel (supervisors, inspectors) to carry out vector surveillance and control should be based within the regions (districts, municipalities). Other key personnel include health educators to develop educational and training materials for vector control professionals and the public/communities, promote community participation in vector control activities, maintain intra- and inter-agency collaboration and coordination, and interact with the press. This chapter details strategies for effective dengue vector control. Success depends on the quality of the control agent, efficiency of the delivery system, coverage, and impact evaluation, considering the resilience of Aedes mosquitoes. Pre-adult control targets aquatic habitats, where immature mosquitoes develop, through environmental management (eliminating containers) and larvicides (bio-rational options like Bti and Spinosad, insect growth regulators, and monomolecular films). Biological control uses aquatic predators. In order to evaluate the success of pre-adult control, both immature and adult populations should be monitored. Adult control involves chemical methods like residual insecticide spraying (indoor/outdoor spraying, barrier treatments) and space spraying. Mosquito traps employ ‘pull’ strategies, such as ovitraps/gravid traps (sticky, insecticide-treated, or larvicide-containing) or attractive toxic sugar baits (ATSBs). Mass trapping with gravid traps shows promise in reducing vector populations and disease transmission, contingent on trap efficacy and coverage. Effective vector control necessitates an integrated approach targeting all life stages, with community involvement and continuous evaluation, due to the adaptability of dengue vectors. The selection of appropriate methods depends on the local ecology of vectors and the specific goals of the control programme.
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Mitra, Debasis, Sergio de los Santos Villalobos, Anju Rani, Beatriz Elena Guerra Sierra, and Snežana Andjelković. "Correction to: Bio-control Agents for Sustainable Agriculture." In Bio-control Agents for Sustainable Agriculture. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3232-9_23.

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Bansal, Nitika, Siya Sharma, Ramkrishna, et al. "Elucidating the Mechanisms of Plant Endophytes as Biocontrol Agents and Resistance Inducers Biotic Stresses." In Bio-control Agents for Sustainable Agriculture. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3232-9_11.

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Deeksha, Mudagadde G., Mahesh M. Jadhav, Niraj Guleria, M. N. Harish, M. Chaitra, and Mritunjoy Barman. "Legal Framework for the Development and Application of Biopesticides Worldwide." In Bio-control Agents for Sustainable Agriculture. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3232-9_20.

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Anandakumar, Selvaraj, and Thangavel Kalaiselvi. "Unraveling the Biocontrol Potential of Phyllosphere Bacteria Against Phytopathogens and Their Significance in Sustainable Agriculture." In Bio-control Agents for Sustainable Agriculture. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3232-9_22.

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Gore, Nileema S., and Priyanka S. Patil. "Deciphering Microbial Cross-Talk for Plant Protection Through Induced Resistance." In Bio-control Agents for Sustainable Agriculture. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3232-9_8.

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Sierra, Beatriz Elena Guerra, Jaider Muñoz Guerrero, Debasis Mitra, and Alvaro José Hernández-Tasco. "Bioprospection of Biocontrol Agents for Mitigating Plant Diseases Related to Climate Change." In Bio-control Agents for Sustainable Agriculture. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3232-9_6.

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Conference papers on the topic "Bio-control agent"

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Choi, Young-Cheol, and Hyo-Sung Ahn. "The Bio-Insect and Artificial Robots Interaction Based on Multi-Agent Reinforcement Learning." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-86688.

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Multi-agent reinforcement learning is a challenging research topic used in various fields including robotics, artificial intelligence, distributed control, and so on. Recently, there have been lots of efforts to develop multi-agent reinforcement learning theories; but there exist many difficulties in multi-agent reinforcement learning system. In this paper, we introduce our on-going project BRIDS (Bio-insect and artificial Robot Interaction based on Distributed System), which is for interactions between a bio-insect and artificial robots using multi-agent reinforcement learning. The main objective of this project is to drive the bio-insect to the desired position using a group of artificial intelligent robots. Simulation results show that artificial intelligent robots drive the bio-insect to the target position using reinforcement learning.
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Gatti, Maíra Athanázio de Cerqueira, and Carlos José Pereira de Lucena. "A Bio-inspired Representation Model for Engineering Self-Organizing Emergent Systems." In Simpósio Brasileiro de Engenharia de Software. Sociedade Brasileira de Computação, 2008. http://dx.doi.org/10.5753/sbes.2008.21333.

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Self-organization is a dynamic and adaptive process where components of a system acquire and maintain information about their environment and neighbors without external control. Agent-Oriented Software Engineering (AOSE) can provide methods and technologies that help building self-organizing systems. A fundamental engineering issue when designing self-organizing emergent multi-agent systems (MASs) is to achieve required macroscopic properties by manipulating the microscopic behavior of locally interacting agents. In this paper, we propose a bio-inspired approach consisting of a representation model that allows a systematic design of the desirable emergent macroscopic properties from a macro scale to the micro scale.
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Ryuh, Young-sun, and Jeon-il Moon. "Multi-agent control and implementation of Bio-inspired underwater robots for mariculture monitoring and control." In 2012 IEEE International Conference on Robotics and Biomimetics (ROBIO). IEEE, 2012. http://dx.doi.org/10.1109/robio.2012.6491062.

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Bradley, Aidan J., Masoud Jahromi Shirazi, and Nicole Abaid. "Comparing Collective Foraging With Interactions Inspired by Pheromones and Sonar." In ASME 2019 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/dscc2019-9190.

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Abstract Communication inspired by animals is a timely topic of research in the modeling and control of multi-agent systems. Examples of such bio-inspired communication methods include pheromone trails used by ants to forage for food and echolocation used by bats to orient themselves and hunt. Source searching is one of many challenges in the field of swarm robotics that tackles an analogous problem to animals foraging for food. This paper seeks to compare two communication methods, inspired by sonar and pheromones, in the context of a multi-agent foraging problem. We explore which model is more effective at recruiting agents to forage from a found target. The results of this work begin to uncover the complicated relationship between sensing modality, collective tasks, and spontaneous cooperation in groups.
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Brown, Daniel S., Shin-Young Jung, and Michael A. Goodrich. "Balancing human and inter-agent influences for shared control of bio-inspired collectives." In 2014 IEEE International Conference on Systems, Man and Cybernetics - SMC. IEEE, 2014. http://dx.doi.org/10.1109/smc.2014.6974582.

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"Intergrated pest management with biocontrol agent for controlling strawberry anthracnose in Taiwan." In Enabling Capacity in Production and Application of Bio-pesticide and bio-fertilizer for Soil-borne Disease Control and Organic Farming. Food and Fertilizer Technology Center for the Asian and Pacific Region, 2019. http://dx.doi.org/10.56669/sxso4034.

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El Badawy, Noha, and Ali Elkharbotly. "Discovery Of A Bio-control Agent In Qatar With Potential To Control The Leaf Spot Diseases Of Date Palm." In Qatar Foundation Annual Research Conference Proceedings. Hamad bin Khalifa University Press (HBKU Press), 2014. http://dx.doi.org/10.5339/qfarc.2014.eeop0297.

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"Application of integrated sensing and automation technology, and preventive bio-control agent for greenhouse precision cultivation." In Protected Cultivation of High-Value Crops under Changing Climate Conditions. Food and Fertilizer Technology Center for the Asian and Pacific Region, 2017. http://dx.doi.org/10.56669/mhms5859.

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Lei, Ming, Haiyan Zhu, Jinsheng Sun, and Weian Huang. "Formulation and Evaluation of Novel Fully Bio-Based Drilling Fluid with Strong Inhibition and Temperature-Enhanced Plugging Properties." In SPE/IADC Asia Pacific Drilling Technology Conference and Exhibition. SPE, 2024. http://dx.doi.org/10.2118/219650-ms.

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Abstract The increasingly severe wellbore instability problem of unconventional hydrocarbon resources (such as tight oil/gas and shale oil/gas) and the intensified environmental requirements necessitate the development of environmentally friendly drilling fluids with strong anti-collapse performance. Herein, a fully bio-based drilling fluid (Pure-Bio system) was formulated from self-developed chitosan-derived shale inhibitor (CMCS), carboxymethyl chitosan-derived thermal-responsive plugging agent (GCOA), rosin-derived nanocomposite plugging agent (PDSA) and optimized thickener of scleroglucan (SCG) and filtrate loss reducer of low-viscosity polyanionic cellulose (PAC-LV). The environmental performance of the Pure-Bio system was determined by biotoxicity and biodegradability evaluations. The engineering performance, including the rheological, filtration, lubrication, and particularly the inhibition and microporous plugging properties, was comprehensively investigated, and the synergistic effects among different additives were analyzed. The results showed that the Pure-Bio system is non-toxic and readily biodegradable with an acute toxicity index of median effective concentration (EC50) for photobacteria above 4 × (105 mg/L and a biodegradability index of the ratio between biological oxygen demand (BOD5) and chemical oxygen demand (COD) over 0.26. Additionally, the Pure-Bio system possesses the rheological characteristics of low plastic viscosity while a high yield point and the effective filtration control ability at both API and HTHP conditions, which can withstand a high temperature over 140°C and contamination by NaCl (10%) and CaCl2 (0.5%). Meanwhile, Pure-Bio shows a significantly reduced extreme pressure lubrication coefficient below 0.1. More importantly, Pure-Bio has strong inhibition performance, reflecting a low clay linear swelling rate and a high shale hot-rolling recovery rate. Also, Pure-Bio exhibits a temperature-enhanced plugging property owing to the synergy of thermal-responsive GCOA and temperature-sensitive deformable PDSA, significantly enhancing the adaptive nano-microporous plugging performance for filter membranes and natural cores at elevated temperatures. Taking advantage of its features, the environmentally acceptable Pure-Bio system has the potential to serve as a promising and innovative anti-collapse drilling fluid with strong inhibition and temperature-sensitive intelligent plugging characteristics for practical drilling applications in unconventional oil/gas fields.
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Bahou, Oumayma, Naima Belayachi, and Brahim Ismail. "Experimental Investigation of the Compatibility of Lime Coating with Insulation Straw Biocomposite." In 4th International Conference on Bio-Based Building Materials. Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/www.scientific.net/cta.1.164.

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The use of bio-based composite as building materials is one of the innovative solutions for dealing with environmental disorders caused by the construction sector. Among these materials we find biocomposites based on vegetable aggregates, which have proven their effectiveness as insulating materials in numerous studies. Despite the growing interest in these materials and the recognition of their performance, their use remains hampered by the lack of implementation rules specific to these materials to move towards a control of their use and their durability affected by the climate and use conditions to which they will be exposed at the level of a building. The objective of this work is to study the compatibility of a protective coating with a block substrate of biocomposites based on cereal straw. It is in fact a mixture of vegetable aggregates (straw), a binder composed of lime and additives also obtained from a renewable source (Ismail et al., 2020). These additives (air-entraining agent, casein protein and a biopolymer) have been added to improve both the fibre-binder interface and the porosity of the binder. The use of these bio-based materials for external or internal thermal insulation of the building requires the application of a coating to protect them against climatic aggressions and to give them an aesthetic appearance. The lime-based coatings, air-entraining agent and casein protein selected for this study have been the subject of an experimental investigation (Brahim Ismail, 2020). In order to assess the compatibility of these coatings with the straw-based insulating material, we were interested in studying the adhesion between the biocomposite and the coating after aging cycles in accordance with the EN 1015-21 standard. The samples (biocomposite + coating) were subjected to two types of aging, one using water and the other using a saline solution of sodium sulphates (Na2SO4). The results of the bond tests after aging showed that the cohesive fracture (at the level of the substrate) is a pattern observed in all the studied systems. In Addition, It has been found that the coating to which a percentage of fine fibers has been added undergoes considerable degradation after aging with salt solution, demonstrating the need of an additional layer of outer coating without fibers in order to ensure the sustainability of the system.
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Reports on the topic "Bio-control agent"

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Kadouri, Daniel E. The Potential Application and Risks Associated With the Use of Predatory Bacteria as a Bio-control Agent Against Wound Infections. Defense Technical Information Center, 2015. http://dx.doi.org/10.21236/ada625508.

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Altstein, Miriam, and Ronald J. Nachman. Rational Design of Insect Control Agent Prototypes Based on Pyrokinin/PBAN Neuropeptide Antagonists. United States Department of Agriculture, 2013. http://dx.doi.org/10.32747/2013.7593398.bard.

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The general objective of this study was to develop rationally designed mimetic antagonists (and agonists) of the PK/PBAN Np class with enhanced bio-stability and bioavailability as prototypes for effective and environmentally friendly pest insect management agents. The PK/PBAN family is a multifunctional group of Nps that mediates key functions in insects (sex pheromone biosynthesis, cuticular melanization, myotropic activity, diapause and pupal development) and is, therefore, of high scientific and applied interest. The objectives of the current study were: (i) to identify an antagonist biophores (ii) to develop an arsenal of amphiphilic topically active PK/PBAN antagonists with an array of different time-release profiles based on the previously developed prototype analog; (iii) to develop rationally designed non-peptide SMLs based on the antagonist biophore determined in (i) and evaluate them in cloned receptor microplate binding assays and by pheromonotropic, melanotropic and pupariation in vivo assays. (iv) to clone PK/PBAN receptors (PK/PBAN-Rs) for further understanding of receptor-ligand interactions; (v) to develop microplate binding assays for screening the above SMLs. In the course of the granting period A series of amphiphilic PK/PBAN analogs based on a linear lead antagonist from the previous BARD grant was synthesized that incorporated a diverse array of hydrophobic groups (HR-Suc-A[dF]PRLa). Others were synthesized via the attachment of polyethylene glycol (PEG) polymers. A hydrophobic, biostablePK/PBAN/DH analog DH-2Abf-K prevented the onset of the protective state of diapause in H. zea pupae [EC50=7 pmol/larva] following injection into the preceding larval stage. It effectively induces the crop pest to commit a form of ‘ecological suicide’. Evaluation of a set of amphiphilic PK analogs with a diverse array of hydrophobic groups of the formula HR-Suc-FTPRLa led to the identification of analog T-63 (HR=Decyl) that increased the extent of diapause termination by a factor of 70% when applied topically to newly emerged pupae. Another biostablePK analog PK-Oic-1 featured anti-feedant and aphicidal properties that matched the potency of some commercial aphicides. Native PK showed no significant activity. The aphicidal effects were blocked by a new PEGylated PK antagonist analog PK-dF-PEG4, suggesting that the activity is mediated by a PK/PBAN receptor and therefore indicative of a novel and selective mode-of-action. Using a novel transPro mimetic motif (dihydroimidazole; ‘Jones’) developed in previous BARD-sponsored work, the first antagonist for the diapause hormone (DH), DH-Jo, was developed and shown to block over 50% of H. zea pupal diapause termination activity of native DH. This novel antagonist development strategy may be applicable to other invertebrate and vertebrate hormones that feature a transPro in the active core. The research identifies a critical component of the antagonist biophore for this PK/PBAN receptor subtype, i.e. a trans-oriented Pro. Additional work led to the molecular cloning and functional characterization of the DH receptor from H. zea, allowing for the discovery of three other DH antagonist analogs: Drosophila ETH, a β-AA analog, and a dF analog. The receptor experiments identified an agonist (DH-2Abf-dA) with a maximal response greater than native DH. ‘Deconvolution’ of a rationally-designed nonpeptide heterocyclic combinatorial library with a cyclic bis-guanidino (BG) scaffold led to discovery of several members that elicited activity in a pupariation acceleration assay, and one that also showed activity in an H. zea diapause termination assay, eliciting a maximal response of 90%. Molecular cloning and functional characterization of a CAP2b antidiuretic receptor from the kissing bug (R. prolixus) as well as the first CAP2b and PK receptors from a tick was also achieved. Notably, the PK/PBAN-like receptor from the cattle fever tick is unique among known PK/PBAN and CAP2b receptors in that it can interact with both ligand types, providing further evidence for an evolutionary relationship between these two NP families. In the course of the granting period we also managed to clone the PK/PBAN-R of H. peltigera, to express it and the S. littoralis-R Sf-9 cells and to evaluate their interaction with a variety of PK/PBAN ligands. In addition, three functional microplate assays in a HTS format have been developed: a cell-membrane competitive ligand binding assay; a Ca flux assay and a whole cell cAMP ELISA. The Ca flux assay has been used for receptor characterization due to its extremely high sensitivity. Computer homology studies were carried out to predict both receptor’s SAR and based on this analysis 8 mutants have been generated. The bioavailability of small linear antagonistic peptides has been evaluated and was found to be highly effective as sex pheromone biosynthesis inhibitors. The activity of 11 new amphiphilic analogs has also been evaluated. Unfortunately, due to a problem with the Heliothis moth colony we were unable to select those with pheromonotropic antagonistic activity and further check their bioavailability. Six peptides exhibited some melanotropic antagonistic activity but due to the low inhibitory effect the peptides were not further tested for bioavailability in S. littoralis larvae. Despite the fact that no new antagonistic peptides were discovered in the course of this granting period the results contribute to a better understanding of the interaction of the PK/PBAN family of Nps with their receptors, provided several HT assays for screening of libraries of various origin for presence of PK/PBAN-Ragonists and antagonists and provided important practical information for the further design of new, peptide-based insecticide prototypes aimed at the disruption of key neuroendocrine physiological functions in pest insects.
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Glazer, Itamar, Alice Churchill, Galina Gindin, and Michael Samish. Genomic and Organismal Studies to Elucidate the Mechanisms of Infectivity of Entomopathogenic Fungi to Ticks. United States Department of Agriculture, 2013. http://dx.doi.org/10.32747/2013.7593382.bard.

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The overall goal of this research was to elucidate the factors affecting early development of Metarhizium spp. (previously named M. anisopliae) on ticks or tick cuticle extracts and the molecular basis of these early infection processes. The original objectives were: 1. Characterize the pre-penetration events (adhesion, germination and appressorium formation) of spores of M. anisopliae strains with high or low virulence during tick infection. 2. Create GFP-expressing strains of M. anisopliae tick pathogens having high and low virulence to compare their progress of infection by microscopy. 3. Use microarray analyses, primarily with existing M. anisopliae EST sequences in GenBank, to identify and characterize fungal genes whose expression is regulated in response to host cuticle extracts. Objective 3 was later modified (as approved by BARD) to use RNAseq to characterize the early stages of fungal gene expression during infection of intact host cuticles. This new method provides a massively larger and more informative dataset and allows us to take advantage of a) recently published genomes of Metarhizium robertsii and M. acridum for RNAseq data analysis, and b) newly developed and highly efficient cDNA sequencing technologies that are relatively low cost and, therefore, allow deep sequencing of multiple transcriptome samples. We examined pre-penetration and penetration events that differentiate high and low virulence strains of Metarhizium spp., focusing on spore adhesion, germination, appressorium formation, and penetration of tick integuments. Initiation of fungal infection was compared on susceptible and resistant tick species at different tick developmental stages. In vitro studies comparing the effects of protein and fatty acid profiles from tick cuticle extracts demonstrated that resistant tick cuticles contain higher concentrations of specific lipids that inhibit fungal development than do susceptible tick cuticles, suggesting one mechanism of Ixodidae resistance to fungal entomopathogens (Objective 1). We used molecular markers to determine that the three M. anisopliae strains from Israel that we studied actually were three distinct species. M. brunneum is highly virulent against the tick Rhipicephalus annulatus, M. pingshaense and M. robertsii are intermediate in virulence, and M. majus is of low virulence. We transformed all four Metarhizium species to express GFP and used them in pathogenicity assays against diverse tick species. Key findings were that a) resistant ticks inhibit Metarhizium infection prior to hemocoel invasion by reducing fungal viability on the cuticle surface (Objective 2), as was supported by the in vitro studies of Objective 1, and b) Metarhizium kills susceptible ticks after cuticle penetration but prior to hemocoel colonization. Transcriptome studies of the most virulent species, M. brunneum, are in progress and include analyses of ungerminated conidia and conidia germination and development on a low nutrient medium or on susceptible R. annulatus exoskeleton (Objective 3). We anticipate these studies will contribute to identifying fungal genetic factors that increase virulence and speed of kill and may help reveal tick chemistries that could be included in biocontrol formulations to increase efficacy. Methodologies developed to screen tick cuticle extracts for ability to support conidia germination and development may help in the selection of wild fungi with increased virulence against resistant ticks. The overall knowledge gained should contribute not only to the improvement of tick control but also to the control of other blood-sucking arthropods and related plant pests. Use of bio-based agents for controlling arthropods will contribute to a healthier, more sustainable environment and serve a growing number of organic food farmers.
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