Biological and biorational management of blast diseases in cereals caused by <i>Magnaporthe oryzae</i>

Chakraborty, Moutoshi; Mahmud, Nur Uddin; Ullah, Chhana; Rahman, M.; Islam, Tofazzal

doi:10.1080/07388551.2021.1898325

Cited by 50 publications

(42 citation statements)

References 173 publications

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“…Many researchers also report that the plant extracts possess several secondary metabolites and phytochemical compounds exhibiting antifungal, antimicrobial, and insecticidal properties (Swodesh and Yuvraj, 2020;Moutoshi et al, 2021). The GC-MS analysis by Mujeeb et al (2014) revealed that A. marmelos contains many bioactive compounds, such as alcohols, aldehydes, fatty acid methyl esters, flavonoids, terpenoids, phenolics, and steroids.…”

Section: Discussionmentioning

confidence: 99%

Biologicals and New Generation Fungicides in the Management of Blast Disease in Rice

Persaud¹,

Saravanakumar²,

Persaud³

et al. 2021

Front. Sustain. Food Syst.

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Background: Blast is a devastating disease in rice production. The current research tested the efficacy of biologicals and fungicides against blast. Aqueous extracts of Azadirachta indica, Ocimum basalicum, Cymbopogan flexousus, Thymus vulgaris, Aloe vera, Tagetes patula, Cordia curassavica, Aegle marmelos, Allium fistulosum, Syzygium aromaticum, and Calotropis gigantea were tested in vitro at 5, 10, and 15% concentrations against Magnaporthe oryzae. Also, two isolates, Bacillus cereus OG2L and B. subtilis OG2A, and one isolate, Azotobacter SAG19, and, similarly, five new generation fungicides were evaluated at three different doses against blast pathogen M. oryzae in vitro. The treatments that exhibited the best performance in vitro were further evaluated against blast disease under field conditions.Results: Extracts of T. patula (5%), C. gigantea (5%), C. curassavica (10%), A. fistulosum (10%), and A. marmelos (15%) showed greater than 81% inhibition to M. oryzae in vitro. Likewise, all three biocontrol agents, viz. B. cereus OG2L, B. subtilis OG2A, and Azotobacter SAG19, demonstrated more than 50% inhibition of mycelial growth of pathogen in vitro, and the commercial formulations of fungicides Propineb, Trifloxystrobin+Tebuconazole, Tebuconazol+Triadimenol, Bacillus subtilis Strain QST 713, and Cinnamon Oil 8%+Clove Oil 2% also significantly inhibited M. oryzae. Under field conditions, C. curassavica (10%), A. marmelos (15%), C. gigantea (5%); B.cereus OG2L; B.subtilis OG2A; Proineb and Trifloxystrobin+Tebuconazole were effective in reducing disease in addition to yield enhancement.Conclusion: Overall, the plant extracts (C. curassavica at 10%, A. marmelos at 15%, C. gigantea at 5%); bio-agents (B. cereus OG2L, B. subtilis OG2A both at 2g/l), and new generation fungicides Antracol 70WP (Proineb) at 2.5 g/l and Nativo 75 WG (Trifloxystrobin+Tebuconazole) at 0.5 g/l provided effective control against blast disease and superior plant growth and yield compared with other treatments and untreated control.

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Section: Discussionmentioning

confidence: 99%

Biologicals and New Generation Fungicides in the Management of Blast Disease in Rice

Persaud¹,

Saravanakumar²,

Persaud³

et al. 2021

Front. Sustain. Food Syst.

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“…[ [51][52][53][54][55] Numerous earlier evaluations have documented the enhanced plant growth, improved yields, root proliferation, solubilization of P (phosphorus) or K (potassium), absorption/fixation of N (nitrogen), and some essential elements by PGPR inoculations [7,32,56,57]. However, the main contribution of PGPR to agroecological systems is N 2 fixation, Psolubilization, antibiotic development, and secretion of related plant growth-promoting substances [8,58,59] (Figure 2). Countable encouraging studies have already shown that agronomic returns are dramatically increasing relative to the treatment of agricultural soils with PGPR inoculations [60][61][62].…”

Section: Beneficial Role Of Rhizobacteria For the Enhancement Of Soil And Plant Healthmentioning

confidence: 99%

“…Different PGPR strains especially Pseudomonas and Bacillus are ubiquitous and capable of producing a wide range of bioactive secondary metabolites against soil-borne pathogens [8,[72][73][74]. The use of PGPR-derived bioactive secondary metabolites is more effective and species-specific compared to chemical pesticides [8,59]. Due to their biological origin, they are environmentally safe and have no side effects on non-target organisms [71,75].…”

Section: Production Of Secondary Metabolitesmentioning

confidence: 99%

“…Those PGPRs can produce soilfriendly antibiotics. Antibiosis is the process of suppression of various diseases such as wheat blast [59,[89][90][91], downy mildew of grapevine [92], and damping-off disease in sugar beet and spinach [8] by the bacterial metabolites. Some of these metabolites could be utilized as green pesticides for the protection of destructive plant diseases [93].…”

Section: Enhancement Of Plant Stress Tolerancementioning

confidence: 99%

“…PGPR are natural, economic, eco-friendly, biodegradable, and target-specific components asso-ciated with the plant root zone which offer protection against harmful pests directly or indirectly. The PGPR represents biocontrol properties against a wide range of soil-borne plant pathogens by producing siderophore, antibiotics, and HCN [8,59,62,156,157]. The identification and use of these beneficial microbes as biocontrol agents will reduce the use of toxic and hazardous chemical pesticides, and also decrease the problems associated with environmental pollution.…”

Section: Biocontrol Activities Of Beneficial Bacteriamentioning

confidence: 99%

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Prospect and Challenges for Sustainable Management of Climate Change-Associated Stresses to Soil and Plant Health by Beneficial Rhizobacteria

et al. 2021

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Climate change imposes biotic and abiotic stresses on soil and plant health all across the planet. Beneficial rhizobacterial genera, such as Bacillus, Pseudomonas, Paraburkholderia, Rhizobium, Serratia, and others, are gaining popularity due to their ability to provide simultaneous nutrition and protection of plants in adverse climatic conditions. Plant growth-promoting rhizobacteria are known to boost soil and plant health through a variety of direct and indirect mechanisms. However, various issues limit the wider commercialization of bacterial biostimulants, such as variable performance in different environmental conditions, poor shelf-life, application challenges, and our poor understanding on complex mechanisms of their interactions with plants and environment. This study focused on detecting the most recent findings on the improvement of plant and soil health under a stressful environment by the application of beneficial rhizobacteria. For a critical and systematic review story, we conducted a non-exhaustive but rigorous literature survey to assemble the most relevant literature (sorting of a total of 236 out of 300 articles produced from the search). In addition, a critical discussion deciphering the major challenges for the commercialization of these bioagents as biofertilizer, biostimulants, and biopesticides was undertaken to unlock the prospective research avenues and wider application of these natural resources. The advancement of biotechnological tools may help to enhance the sustainable use of bacterial biostimulants in agriculture. The perspective of biostimulants is also systematically evaluated for a better understanding of the molecular crosstalk between plants and beneficial bacteria in the changing climate towards sustainable soil and plant health.

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Antifungal Secondary Metabolites Against Blast Fungus Magnaporthe oryzae

Chakraborty

Islam

2022

Fungal Biology

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Biological and biorational management of blast diseases in cereals caused by Magnaporthe oryzae

Cited by 50 publications

References 173 publications

Biologicals and New Generation Fungicides in the Management of Blast Disease in Rice

Biologicals and New Generation Fungicides in the Management of Blast Disease in Rice

Prospect and Challenges for Sustainable Management of Climate Change-Associated Stresses to Soil and Plant Health by Beneficial Rhizobacteria

Antifungal Secondary Metabolites Against Blast Fungus Magnaporthe oryzae

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