Biotic Constraints to Wheat Production in Tropics: Microbial Control Strategies and Mechanism

Pathogens Associated with Sugarcane Borers,Diatraeaspp. (Lepidoptera: Crambidae): A Review

International Journal of Zoology ◽

10.1155/2012/303589 ◽

2012 ◽

Vol 2012 ◽

pp. 1-12 ◽

Cited By ~ 4

Author(s):

Víctor M. Hernández-Velázquez ◽

Laura P. Lina-García ◽

Verónica Obregón-Barboza ◽

Adriana G. Trejo-Loyo ◽

Guadalupe Peña-Chora

Keyword(s):

Control Strategies ◽

Microbial Control ◽

Stem Borers

The objective of this paper was to analyze information related to entomopathogenic-associatedDiatraeaspp. Gaining a better understanding of the effects of these microorganisms will help in the development of successful microbial control strategies against stem borers that attack sugarcane plants.

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Effect of silicon on aphid populations and wheat yield in Minas Gerais, Brazil

Semina Ciências Agrárias ◽

10.5433/1679-0359.2020v41n6p2481 ◽

2020 ◽

Vol 41 (6) ◽

pp. 2481-2494

Author(s):

Gabriel Fernandes Rezende ◽

◽

Marcus Vinicius Sampaio ◽

Beliza Queiroz Vieira Machado ◽

Diego Tolentino de Lima ◽

...

Keyword(s):

Yield Components ◽

Crop Production ◽

Control Strategies ◽

Rhopalosiphum Padi ◽

Wheat Yield ◽

Aphid Species ◽

Minas Gerais ◽

Wheat Production ◽

Experimental Area ◽

Aphid Populations

The area cultivated with wheat has been increasing in the savannahs of the state of Minas Gerais, Brazil. Aphids are usually one of the main pests of wheat in many regions of the world; however, little is known about the aphid population in this new environment. The southern region of Brazil, the main wheat production area, has had several problems as a result of aphids, but aphid populations and the resulting impact on wheat production have not been investigated in these new crop production areas. Understanding control strategies to manage this insect could be essential for the “Cerrado” wheat that is grown in this area. The application of silicon (Si) has the potential to reduce the population growth of wheat aphids; however no field studies have been reported. Hence, we evaluated the effect of Si fertilization via soil application on the aphid populations and species composition and on yield components of wheat in three locations in Minas Gerais; the experiment was repeated simultaneously in Uberlândia, at the experimental areas of UFU and IFTM, and in Montes Claros, at the experimental area of UFMG, using the cultivars BRS 264 and BRS 394. The aphids first appeared just before wheat earing; they were then sampled six times over the course of the study, seven days apart, starting from 45 days after sowing. The aphid species Sitobion avenae (Fabricius), Schizaphis graminum (Rondani), and Rhopalosiphum padi (Linnaeus) were observed in all three locations; S. avenae was the dominant species in all locations. The experimental area of UFU had the highest number of S. avenae aphids per tiller for both cultivars, while UFMG had the lowest populations. Aphid populations and wheat yield components were not affected by soil Si fertilization. There was no difference in yield as a result of location or cultivar, but the location UFU and the cultivar BRS 394 had the greatest average hectoliter weight.

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Biogeography and genotypic diversity of Metarhizium brunneum and Metarhizium robertsii in northwestern North American soils

Canadian Journal of Microbiology ◽

10.1139/cjm-2018-0297 ◽

2019 ◽

Vol 65 (4) ◽

pp. 261-281 ◽

Cited By ~ 1

Author(s):

G. Douglas Inglis ◽

Grant M. Duke ◽

Mark S. Goettel ◽

J. Todd Kabaluk ◽

Rodrigo Ortega-Polo

Keyword(s):

North American ◽

Control Strategies ◽

Natural Habitat ◽

Microbial Control ◽

Genotypic Diversity ◽

Metarhizium Robertsii ◽

Metarhizium Brunneum ◽

Genotype Diversity

The biogeography and genotype diversity of Metarhizium species in northwestern North American soils was examined; 20 ecoregions were sampled, including 58 agricultural and 80 natural habitat subsites, and areas that were glaciated during the Pleistocene epoch. One hundred and twenty-nine isolates of M. brunneum, 26 isolates of M. robertsii, four isolates of M. guizhouense, one isolate of M. flavoviride, and 55 isolates of Beauveria were recovered. Metarhizium and Beauveria species were isolated in diverse ecoregions within the study area, but a trend for increased isolation of Metarhizium species in western regions of the study area was observed. Consistent with this observation, the prevalence of M. brunneum and M. robertsii decreased at higher elevations, and the opposite was true for Beauveria. Both M. brunneum and M. robertsii were more commonly isolated from agricultural and natural habitat subsites, and considerable genotypic diversity was observed in both habitats and within the same subsite. Metarhizium robertsii, but not M. brunneum, was more commonly isolated from nonglaciated locations; however, less diversity and richness was observed for M. brunneum recovered from glaciated versus nonglaciated locations consistent with insular biogeography. The study has implications for microbial control strategies in the region.

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Photosensitization With Supramolecular Arrays for Enhanced Antimicrobial Photodynamic Treatments

Frontiers in Bioengineering and Biotechnology ◽

10.3389/fbioe.2021.655370 ◽

2021 ◽

Vol 9 ◽

Author(s):

Cecilia Vera ◽

Fiorella Tulli ◽

Claudio D. Borsarelli

Keyword(s):

Photodynamic Therapy ◽

Infectious Diseases ◽

Supramolecular Chemistry ◽

Recent Literature ◽

Control Strategies ◽

Microbial Control ◽

Antimicrobial Photodynamic Therapy ◽

Exciting Field ◽

Microbial Infections ◽

Multiple Drugs

Microbial infections represent a silent threat to health that has worsened in recent decades due to microbial resistance to multiple drugs, preventing the fight against infectious diseases. Therefore, the current postantibiotic era forces the search for new microbial control strategies. In this regard, antimicrobial photodynamic therapy (aPDT) using supramolecular arrays with photosensitizing capabilities showed successful emerging applications. This exciting field makes it possible to combine applied aspects of molecular photochemistry and supramolecular chemistry, together with the development of nano- and biomaterials for the design of multifunctional or “smart” supramolecular photosensitizers (SPS). This minireview aims to collect the concepts of the photosensitization process and supramolecular chemistry applied to the development of efficient applications of aPDT, with a brief discussion of the most recent literature in the field.

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Entomopathogenic Nematodes in Italy: Occurrence and Use in Microbial Control Strategies

Nematode Pathogenesis of Insects and Other Pests ◽

10.1007/978-3-319-18266-7_18 ◽

2015 ◽

pp. 431-449 ◽

Cited By ~ 1

Author(s):

Francesca De Luca ◽

Mirella Clausi ◽

Alberto Troccoli ◽

Giovanna Curto ◽

Giancarlo Rappazzo ◽

...

Keyword(s):

Entomopathogenic Nematodes ◽

Control Strategies ◽

Microbial Control

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Probiotic Bacteria as Biological Control Agents in Aquaculture

Microbiology and Molecular Biology Reviews ◽

10.1128/mmbr.64.4.655-671.2000 ◽

2000 ◽

Vol 64 (4) ◽

pp. 655-671 ◽

Cited By ~ 1059

Author(s):

Laurent Verschuere ◽

Geert Rombaut ◽

Patrick Sorgeloos ◽

Willy Verstraete

Keyword(s):

State Of The Art ◽

Control Strategies ◽

Microbial Control ◽

Disease Outbreaks ◽

Probiotic Bacteria ◽

Commercial Application ◽

Aquatic Environments ◽

Adhesion Sites ◽

Definition Of ◽

Aquaculture Production

SUMMARY There is an urgent need in aquaculture to develop microbial control strategies, since disease outbreaks are recognized as important constraints to aquaculture production and trade and since the development of antibiotic resistance has become a matter of growing concern. One of the alternatives to antimicrobials in disease control could be the use of probiotic bacteria as microbial control agents. This review describes the state of the art of probiotic research in the culture of fish, crustaceans, mollusks, and live food, with an evaluation of the results obtained so far. A new definition of probiotics, also applicable to aquatic environments, is proposed, and a detailed description is given of their possible modes of action, i.e., production of compounds that are inhibitory toward pathogens, competition with harmful microorganisms for nutrients and energy, competition with deleterious species for adhesion sites, enhancement of the immune response of the animal, improvement of water quality, and interaction with phytoplankton. A rationale is proposed for the multistep and multidisciplinary process required for the development of effective and safe probiotics for commercial application in aquaculture. Finally, directions for further research are discussed.

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