Endophytic Microorganisms as Biological Control Agents for Plant Pathogens: A Panacea for Sustainable Agriculture

2019 ◽  
pp. 1-20
Author(s):  
Charles Oluwaseun Adetunji ◽  
Deepak Kumar ◽  
Meenakshi Raina ◽  
Olawale Arogundade ◽  
Neera Bhalla Sarin
Keyword(s):  
Biological Control ◽  
Sustainable Agriculture ◽  
Plant Pathogens ◽  
Biological Control Agents ◽  
Endophytic Microorganisms

scholarly journals Impact of the omic technologies for understanding the modes of action of biological control agents against plant pathogens

BioControl ◽  
2015 ◽  
Vol 60 (6) ◽  
pp. 725-746 ◽  
Author(s):  
Sebastien Massart ◽  
Michele Perazzolli ◽  
Monica Höfte ◽  
Ilaria Pertot ◽  
M. Haïssam Jijakli
Keyword(s):  
Biological Control ◽  
Plant Pathogens ◽  
Biological Control Agents ◽  
Modes Of Action

scholarly journals Exploration and Identification Trichoderma spp. as a Biological Control Agents to Plant Pathogens and Starter Making Biological Fertilizers

2020 ◽  
Vol 13 (1) ◽  
pp. 222-226
Author(s):  
Henny V.G. Makal ◽  
Max M. Ratulangi ◽  
Denny S. Sualang
Keyword(s):  
Biological Control ◽  
Population Density ◽  
Plant Pathogens ◽  
Soil Samples ◽  
Dilution Method ◽  
Biological Control Agents ◽  
Trichoderma Spp ◽  
Trichoderma Species ◽  
Trichoderma Sp ◽  
Biological Fertilizer

The objectives of this study are: (1) to inventory Trichoderma spp. in North Minahasa District, South Minahasa District, and Tomohon City-Minahasa District, (2) inventory of Trichoderma spp. in the rhizosphere of cultivated and fallow gardens, and (3) calculate the population density of Trichoderma spp. all soil samples. The scope of this study is the biological control of plant pathogens, induce plant resistance, and biological fertilizer production. Trichoderma isolation spp. has been carried out by dilution method and cultured on PDA + antibiotics. Population density of Trichoderma spp. calculated using the plate calculation method. Identification of this species function based on the color and patterns of sporulation in the colony; hyphae and clamydospores; conidiophores; and phialides and phialospores. Trichoderma species found in North Minahasa District were T. harzianum, T. koningii, and T. viride; in South Minahasa District, T. koningii and T. viride; and in Tomohon City-Minahasa District, T. koningii and T. viride. In fallow gardens were T. harzianum, T. koningii, and T. viride, and in cultivated gardens were T. koningii and T. viride. Population densities of Trichoderma sp. in South Minahasa District, North Minahasa District, and Tomohon City-Minahasa District, respectively 1,363.64, 466.67, and 26.67 CFU / g soil.

Plant Pathogens at Work: Improving Weed Control Efficacy

2007 ◽  
Vol 8 (1) ◽  
pp. 33
Author(s):  
C. B. Yandoc-Ables ◽  
E. N. Rosskopf ◽  
R. Charudattan
Keyword(s):  
Biological Control ◽  
Host Range ◽  
Weed Control ◽  
Plant Pathogens ◽  
Classical Approach ◽  
Biological Control Agents ◽  
Control Efficacy ◽  
Population Research ◽  
Weed Population

Research in the area of the use of plant pathogens as biological control agents for weeds is conducted using either the classical or the bioherbicidal approach. In the classical approach, a pathogen is typically imported from a foreign location to control an introduced weed target. In the inundative or bioherbicide strategy, an indigenous pathogen is cultured to produce large quantities of inoculum that are applied at high rates to the entire target weed population. Research on the development of plant pathogens for biological control using the inundative or bioherbicide approach has moved from determining host range and demonstrating pathogenicity to investigating systems that enhance the efficacy of these agents. Accepted for publication 9 April 2007. Published 22 August 2007.

Plant Pathogens at Work: Progress and Possibilities for Weed Biocontrol Classical versus Bioherbicidal Approach

2007 ◽  
Vol 8 (1) ◽  
pp. 32 ◽  
Author(s):  
C. B. Yandoc-Ables ◽  
E. N. Rosskopf ◽  
R. Charudattan
Keyword(s):  
Biological Control ◽  
Weed Control ◽  
Plant Pathogens ◽  
Classical Biological Control ◽  
Invasive Weeds ◽  
Biological Control Agents ◽  
Weed Biological Control ◽  
Application Technology ◽  
Control Efficacy ◽  
Weed Biocontrol

Weed biological control using plant pathogens has been successfully implemented for a number of important invasive weeds. Both the classical and bioherbicide approaches have shown promise depending on the characteristics of the target weed. Bioherbicidal activity can be improved with research on formulation and application technology. Other approaches that have improved weed control efficacy for both classical biological control agents and bioherbicides include using a combination of pathogens and insects. Accepted for publication 9 April 2007. Published 22 August 2007.

scholarly journals Ex VivoApplication of Secreted Metabolites Produced by Soil-Inhabiting Bacillus spp. Efficiently Controls Foliar Diseases Caused by Alternaria spp.

2015 ◽  
Vol 82 (2) ◽  
pp. 478-490 ◽  
Author(s):  
Gul Shad Ali ◽  
Ashraf S. A. El-Sayed ◽  
Jaimin S. Patel ◽  
Kari B. Green ◽  
Mohammad Ali ◽  
...  
Keyword(s):  
Biological Control ◽  
Plant Pathogens ◽  
Foliar Application ◽  
Control Plant ◽  
Complex Mixture ◽  
Biological Control Agents ◽  
In Planta ◽  
Content Type ◽  
Foliar Diseases ◽  
Culture Filtrates

ABSTRACTBacterial biological control agents (BCAs) are largely used as live products to control plant pathogens. However, due to variable environmental and ecological factors, live BCAs usually fail to produce desirable results against foliar pathogens. In this study, we investigated the potential of cell-free culture filtrates of 12 different bacterial BCAs isolated from flower beds for controlling foliar diseases caused byAlternariaspp.In vitrostudies showed that culture filtrates from two isolates belonging toBacillus subtilisandBacillus amyloliquefaciensdisplayed strong efficacy and potencies againstAlternariaspp. The antimicrobial activity of the culture filtrate of these two biological control agents was effective over a wider range of pH (3.0 to 9.0) and was not affected by autoclaving or proteolysis. Comparative liquid chromatography-mass spectrometry (LC-MS) analyses showed that a complex mixture of cyclic lipopeptides, primarily of the fengycin A and fengycin B families, was significantly higher in these two BCAs than inactiveBacillusspp. Interaction studies with mixtures of culture filtrates of these two species revealed additive activity, suggesting that they produce similar products, which was confirmed by LC-tandem MS analyses. Inin plantapre- and postinoculation trials, foliar application of culture filtrates ofB. subtilisreduced lesion sizes and lesion frequencies caused byAlternaria alternataby 68 to 81%. Taken together, our studies suggest that instead of live bacteria, culture filtrates ofB. subtilisandB. amyloliquefacienscan be applied either individually or in combination for controlling foliar diseases caused byAlternariaspecies.

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