scholarly journals Biocontrol of Phytopathogens under Aquaponics Systems

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 2061 ◽  
Author(s):  
Tomás Rivas-García ◽  
Ramsés Ramón González-Estrada ◽  
Roberto Gregorio Chiquito-Contreras ◽  
Juan José Reyes-Pérez ◽  
Uriel González-Salas ◽  
...  
Keyword(s):  
Biological Control ◽  
Food Production ◽  
Plant Pathogens ◽  
Control Plant ◽  
Plant Diseases ◽  
Biological Control Agents ◽  
Economic Resource ◽  
Systems Research ◽  
Chemical Inputs ◽  
Potential Use

Aquaponics is an alternative method of food production that confers advantages of biological and economic resource preservations. Nonetheless, one of the main difficulties related to aquaponics systems could be the outbreak and dissemination of pathogens. Conventional treatments need to be administrated carefully because they could be harmful to human, fish, plants and beneficial microorganisms. Aquaponics practitioners are relatively helpless against plant diseases when they occur, especially in the case of root pathogens. Biological control agents (BCAs) may be an effective alternative to chemical inputs for dealing with pathogens of plants under aquaponics systems. Research of BCAs on aquaponics systems is limited, but there are numerous publications on the use of BCAs to control plant pathogens under soilless systems which confirm its potential use on aquaponics systems. The present review summarized the principal plant pathogens, the conventional and alternative BCA treatments on aquaponics systems, while considering related research on aquaculture and soilless systems (i.e., hydroponic) for its applicability to aquaponics and future perspectives related to biological control. Finally, we emphasized the case that aquaponics systems provide relatively untapped potential for research on plant biological control agents. Biological control has the potential to reduce the perturbation effects of conventional treatments on microbial communities, fish and plant physiology, and the whole function of the aquaponics system.

Clonostachys rosea to control plant diseases

2021 ◽  
pp. 429-472
Author(s):  
Dan Funck Jensen ◽  
◽  
Mukesh Dubey ◽  
Birgit Jensen ◽  
Magnus Karlsson ◽  
...  
Keyword(s):  
Biological Control ◽  
Plant Protection ◽  
Control Plant ◽  
Plant Diseases ◽  
Bumble Bees ◽  
Key Factors ◽  
Clonostachys Rosea ◽  
Protection Strategies ◽  
Rhizosphere Competence ◽  
Potential Use

The fungus Clonostachys rosea was recognized as an aggressive parasite on other fungi already in the late 1950s. Research into its potential use in biological control of plant diseases soon followed. Today, there are several commercial products based on C. rosea available for biocontrol applications worldwide. Although its mycoparasitic ability has attracted a lot of interest, C. rosea is now viewed as an ecological generalist whose lifestyle also includes plant endophytism, rhizosphere competence and polyphagous ability. Protocols for producing high amounts of C. rosea spores are available for both solid state and liquid fermentation. Low temperature and low moisture content are key factors that influence the shelf life of C. rosea propagules. Products based on C. rosea can be delivered to flowers using bumble bees, applied by spraying or as seed dressing or by incorporation into the soil. Clonostachys rosea is today an established factor in sustainable plant protection strategies.

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.

scholarly journals Microbial antagonists against plant pathogens in Iran: A review

2020 ◽  
Vol 5 (1) ◽  
pp. 404-440 ◽  
Author(s):  
Mehrdad Alizadeh ◽  
Yalda Vasebi ◽  
Naser Safaie
Keyword(s):  
Biological Control ◽  
Chemical Control ◽  
Plant Disease ◽  
Plant Pathogens ◽  
Plant Diseases ◽  
Agricultural Products ◽  
Control Measures ◽  
Wide Range ◽  
Plant Disease Management ◽  
Published Research

AbstractThe purpose of this article was to give a comprehensive review of the published research works on biological control of different fungal, bacterial, and nematode plant diseases in Iran from 1992 to 2018. Plant pathogens cause economical loss in many agricultural products in Iran. In an attempt to prevent these serious losses, chemical control measures have usually been applied to reduce diseases in farms, gardens, and greenhouses. In recent decades, using the biological control against plant diseases has been considered as a beneficial and alternative method to chemical control due to its potential in integrated plant disease management as well as the increasing yield in an eco-friendly manner. Based on the reported studies, various species of Trichoderma, Pseudomonas, and Bacillus were the most common biocontrol agents with the ability to control the wide range of plant pathogens in Iran from lab to the greenhouse and field conditions.

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 Temperature-Mediated Plasticity Regulates the Adaptation of Phytophthora infestans to Azoxystrobin Fungicide

2020 ◽  
Vol 12 (3) ◽  
pp. 1188 ◽  
Author(s):  
Yahuza Lurwanu ◽  
Yan-Ping Wang ◽  
Waheed Abdul ◽  
Jiasui Zhan ◽  
Li-Na Yang
Keyword(s):  
Phytophthora Infestans ◽  
Population Differentiation ◽  
Food Production ◽  
Plant Pathogens ◽  
Target Genes ◽  
Common Garden ◽  
Plant Diseases ◽  
Control Effectiveness ◽  
Plant Disease Management ◽  
Simple Sequence

Fungicide is one of the main approaches used in agriculture to manage plant diseases for food production, but their effectiveness can be reduced due to the evolution of plant pathogens. Understanding the genetics and evolutionary processes responsible for the development of fungicide resistance is a key to food production and social sustainability. In this study, we used a common garden experiment to examine the source of genetic variation, natural selection, and temperature contributing to the development of azoxystrobin resistance in Phytophthora infestans and infer sustainable ways of plant disease management in future. We found that plasticity contributed to ~40% of phenotypic variation in azoxystrobin sensitivity while heritability accounted for 16%. Further analysis indicated that overall population differentiation in azoxystrobin sensitivity (QST) was significantly greater than the overall population differentiation in simple sequence repeat (SSR) marker (FST), and the P. infestans isolates demonstrated higher level of azoxystrobin sensitivity at the higher experimental temperature. These results suggest that changes in target gene expression, enzymatic activity, or metabolic rate of P. infestans play a more important role in the adaptation of the pathogen to azoxystrobin resistance than that of mutations in target genes. The development of azoxystrobin resistance in P. infestans is likely driven by diversifying selection for local adaptation, and elevated temperature associated with global warming in the future may increase the effectiveness of using azoxystrobin to manage P. infestans. The sustainable approaches for increasing disease control effectiveness and minimizing the erosion of the fungicide efficacy are proposed.

The family Bombyliidae in the Kingdom of Saudi Arabia (Diptera: Brachycera: Asiloidea)

Zootaxa ◽  
2019 ◽  
Vol 4590 (1) ◽  
pp. 59 ◽  
Author(s):  
MAGDI S. EL-HAWAGRY ◽  
HATHAL M. AL DHAFER
Keyword(s):  
Biological Control ◽  
Saudi Arabia ◽  
Saudi Arabian ◽  
Biological Control Agents ◽  
Kingdom Of Saudi Arabia ◽  
Old World ◽  
The Family ◽  
Potential Use

Bombyliidae, also known as "Bee flies", is one of the dipteran families that have species of potential use as biological control agents, as their larvae are predators or parasitoids of eggs, larvae, prepupae or pupae of other insects. The hosts of Bombyliidae are found within six orders of insects: Lepidoptera, Orthoptera, Hymenoptera, Diptera, Coleoptera, and Neuroptera, in addition to the arachnid order Araneae (Spiders). However, almost half of all host records are from bees and wasps (Hymenoptera). The present work provides a catalogue of bee flies (Family Bombyliidae) in the Kingdom of Saudi Arabia. Old World synonymies, type localities, world distributions by biogeographic realm(s) and country, Saudi Arabian localities and dates of collection are provided. A total of 116 species belonging to 40 genera, 12 tribes and 10 subfamilies has been catalogued. Hosts and/or habitat data, where known, are given under the proper genera and/or species. Colored photographs of some species are provided.

Infection of plant-parasitic nematodes by nematophagous fungi – a review of the application of molecular biology to understand infection processes and to improve biological control

Nematology ◽  
2004 ◽  
Vol 6 (2) ◽  
pp. 161-170 ◽  
Author(s):  
Oliver Morton ◽  
Penny Hirsch ◽  
Brian Kerry
Keyword(s):  
Biological Control ◽  
Molecular Biology ◽  
Control Plant ◽  
Nematophagous Fungi ◽  
Parasitic Nematodes ◽  
Biological Control Agents ◽  
Plant Parasitic Nematodes ◽  
Parasitic Fungi ◽  
Infection Processes ◽  
Plant Parasitic

AbstractEnvironmental concerns over conventional nematicides have led to increasing interest in the use of biological control agents to control plant-parasitic nematodes. The development of nematophagous fungi as biological control agents has revealed a need for further understanding of their infection processes. The egg-parasitic fungi, Pochonia chlamydosporia and Paecilomyces lilacinus, and the nematode trapping fungus, Arthrobotrys oligospora, have received the most attention. Through the application of biochemistry and molecular biology, aspects of their infection processes have been elucidated. This has involved the characterisation of enzymes that aid penetration of the eggshell or the nematode body wall and the identification of nematicidal toxins. This growing understanding of the biology of infection is opening new avenues in the improvement of fungi as biological control agents.

scholarly journals Actinomycetes, promising tools to control plant diseases and to promote plant growth

2005 ◽  
Vol 82 (3) ◽  
pp. 85-102 ◽  
Author(s):  
C.L. Doumbou ◽  
M.K. Hamby Salove ◽  
D.L. Crawford ◽  
C. Beaulieu
Keyword(s):  
Plant Growth ◽  
Plant Pathogens ◽  
Soil Microbial Biomass ◽  
Extracellular Enzymes ◽  
Control Plant ◽  
Plant Diseases ◽  
Soil Microbial ◽  
Plant Growth Promoting ◽  
Promote Plant Growth ◽  
Growth Promoting

Actinomycetes represent a high proportion of the soil microbial biomass and have the capacity to produce a wide variety of antibiotics and of extracellular enzymes. Several strains of actinomycetes have been found to protect plants against plant diseases. This review focuses on the potential of actinomycetes as (a) source of agroactive compounds, (b) plant growth promoting organisms, and (c) biocontrol tools of plant diseases. This review also addresses examples of biological control of fungal and bacterial plant pathogens by actinomycetes species which have already reached the market or are likely to be exploited commercially within the next few years.

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