Management of rice blast disease (Pyricularia oryzae) using formulated&lt;br&gt;bacterial consortium

Suryadi, Yadi; Susilowati, Dwi Ningsih; Riana, E.; Mubarik, Nisa Rachmania

doi:10.9755/ejfa.v25i5.12564

Cited by 27 publications

(16 citation statements)

References 22 publications

(18 reference statements)

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“…The antifungal activity of the microorganisms we found (B. subtilis 5, B. cereus 3S5, and P. fluorecens 10S2) demonstrated their ability to inhibit the growth of the rice pathogen (M. oryzae) and were strong candidates for biocontrol agents for rice blast disease compared with previous studies, which were 19.27% and 53.32% inhibition rates [18]. In contrast to chemical fungicides, biocontrol bacteria produce a mixture of antifungal compounds that can fluctuate in content based on environmental cues [8].…”

Section: Discussionmentioning

confidence: 59%

The Control of Rice Blast Disease by the Novel Biofungicide Formulations

et al. 2019

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The study aims to develop novel biofungicide formulations against rice blast disease. A total of 300 rhizobacteria strains were isolated from rice field soil and were examined for the inhibition of Magnaporthe oryzae growth in a vitro test. Among them, only six rhizobacteria showed inhibition against M. oryzae. The three strains that showed the highest inhibition were Bacillus subtilis 5, B. cereus 3S5, and Pseudomonas fluorecens 10S2. A rice hull mixture and liquid medium were mixed with the above-mentioned bacterial suspensions into three bacterial formulas and tested separately on the rice cultivar UPLRi-5 after infection by M. oryzae under a controlled condition. The three novel biofungicide formulas significantly inhibited rice blast disease intensity with a mean disease control rate being approximately 31% higher than the control. The formulas proved to be effective and should be considered as promising novel treatments for rice blast disease.

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Section: Discussionmentioning

confidence: 59%

The Control of Rice Blast Disease by the Novel Biofungicide Formulations

et al. 2019

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“…Pseudomonas and Bacillus isolates were reported to control the rice blast fungus P. oryzae (Suryadi, Susilowati, Riana, & Mubarik, 2013). Inoculation with P. fluorescens and Bacillus isolates via seed treatment was effective in controlling the brown spot fungus B. oryzae and the leaf scald fungus G. oryzae in rice (Moura et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Combined Effects of Biological and Chemical Treatment on Rice Seed Physiological and Sanitary Quality

Pereira¹,

Benites²,

Catelan³

et al. 2019

JAS

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This study aimed to evaluate the efficiency of integrated biological and chemical control of pathogens in rice seeds and their effects on seed quality. The experiment was conducted in a 2 × 5 factorial completely randomized design. Fungicide-treated (carboxin/thiram) and untreated rice seeds were inoculated with distilled water (control), Azospirillum brasilense, Bacillus subtilis, Pseudomonas fluorescens, or Trichoderma harzianum. Seed vigor and viability, shoot and root length, and seedling dry weight were determined. The blotter test was carried out to assess seed health. Fungicide treatment improved seed vigor and viability and reduced the incidence of fungi. Biological treatment did not enhance the physiological quality of seeds but was able to control fungi. A. brasilense, B. subtilis, P. fluorescens, and T. harzianum controlled Phoma sorghina; B. subtilis, P. fluorescens, and T. harzianum were effective against Aspergillus flavus; P. fluorescens and T. harzianum controlled Pyricularia oryzae; and T. harzianum was effective against Gerlachia oryzae.

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“…Similarly, the glume blight infestation first affects the foliage and induces wilting and structural change in the canopy [ 55 ]. By comparison, the first symptom of rice blast infestation is dehydration and destruction of the pigmentary system, which leads to discoloration in appearance and a series of physiological and biochemical variations in leaves [ 56 ]. Changes in external architecture and internal biophysical parameters provide evidences for remote detection of diseases infestations.…”

Section: Discussionmentioning

confidence: 99%

Partial Least Square Discriminant Analysis Based on Normalized Two-Stage Vegetation Indices for Mapping Damage from Rice Diseases Using PlanetScope Datasets

Shi

Ruan

et al. 2018

Sensors

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In recent decades, rice disease co-epidemics have caused tremendous damage to crop production in both China and Southeast Asia. A variety of remote sensing based approaches have been developed and applied to map diseases distribution using coarse- to moderate-resolution imagery. However, the detection and discrimination of various disease species infecting rice were seldom assessed using high spatial resolution data. The aims of this study were (1) to develop a set of normalized two-stage vegetation indices (VIs) for characterizing the progressive development of different diseases with rice; (2) to explore the performance of combined normalized two-stage VIs in partial least square discriminant analysis (PLS-DA); and (3) to map and evaluate the damage caused by rice diseases at fine spatial scales, for the first time using bi-temporal, high spatial resolution imagery from PlanetScope datasets at a 3 m spatial resolution. Our findings suggest that the primary biophysical parameters caused by different disease (e.g., changes in leaf area, pigment contents, or canopy morphology) can be captured using combined normalized two-stage VIs. PLS-DA was able to classify rice diseases at a sub-field scale, with an overall accuracy of 75.62% and a Kappa value of 0.47. The approach was successfully applied during a typical co-epidemic outbreak of rice dwarf (Rice dwarf virus, RDV), rice blast (Magnaporthe oryzae), and glume blight (Phyllosticta glumarum) in Guangxi Province, China. Furthermore, our approach highlighted the feasibility of the method in capturing heterogeneous disease patterns at fine spatial scales over the large spatial extents.

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Management of rice blast disease (Pyricularia oryzae) using formulated<br>bacterial consortium

Cited by 27 publications

References 22 publications

The Control of Rice Blast Disease by the Novel Biofungicide Formulations

The Control of Rice Blast Disease by the Novel Biofungicide Formulations

Combined Effects of Biological and Chemical Treatment on Rice Seed Physiological and Sanitary Quality

Partial Least Square Discriminant Analysis Based on Normalized Two-Stage Vegetation Indices for Mapping Damage from Rice Diseases Using PlanetScope Datasets

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