Biocontrol and seed transmission of Bipolaris oryzae and Gerlachia oryzae to rice seedlings

Moura, Andrea Bittencourt; Ludwig, Juliane; Santos, Aline Garske; Schafer, Jaqueline Tavares; Soares, Vanessa Nogueira; Corrêa, Bianca Obes

doi:10.1590/2317-1545v36n41009

Cited by 11 publications

(6 citation statements)

References 17 publications

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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). Another study found that rice seeds inoculated with B. subtilis DFs422 and infected with G. oryzae showed low-severity symptoms of the disease for the first 21 days and became resistant to the fungus after this period (Ludwig, Moura, Santos, & Ribeiro, 2009).…”

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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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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“…Those results were very similar to those found in the present study. Moura et al [26] also found that Bacillus spp. inoculated on rice seeds (Oryza sativa L.) was efficient in the control of Gerlachia oryzae, causal agent of scald spot and Silva et al [5] confirmed the potential of B. cereus and Bacillus sp.…”

Section: Fov Seed Transmission To the Seedlingsmentioning

confidence: 95%

“…A significant increase of length and dry matter of seedlings were verified in some studies of seeds treated with Trichoderma spp. [10,11,26,27,28].…”

Section: Effect Of the Biocontrol Agents In The Physiological Qualitymentioning

confidence: 99%

Biocontrol Potential of Trichoderma and Bacillus Species on Fusarium oxysporum f. sp vasinfectum

Farias

Nascimento

Cruz

et al. 2019

JEAI

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Fusarium wilt, caused by Fusarium oxysporum f. sp. vasinfectum, is one of the major diseases of cotton. Preventive methods to manage this disease should be adopted what includes the seed treatment with biocontrol agents as a good alternative. This work aimed to evaluate the efficiency of biological products based on Trichoderma spp. and Bacillus subtilis in the control of Fusarium oxysporum f. sp. vasinfectum (Fov) applied in seeds and seedlings of cotton. The experiment was carried out at the Laboratório de Fitopatologia of the Centro de Ciências Agrárias, of the Universidade Federal de Paraíba (CCA-UFPB), located in the city of Areia, Paraíba - Brazil. The disease transmission of the seeds to the seedlings was evaluated. After the transmission test, cotton seeds of the variety Mocó (Gossypium hirsutum var. Marie-gallante (Watt) Hutch.), BRS 286 and Topázio cultivar (Gossypium hirsutum L.) were submitted to the treatments T1 - Control, T2 - Trichodel® (0,5 mL); T3-Trichodel® (1.0 mL); T4-Trichodel® (1.5 mL); T5-Trichodel® (2.0 mL); T6-Bactel® (2.0 mL); T7-Bactel® (2.5 mL); T8-Bactel® (3.0 mL); T9-Bactel® (3.5 mL) diluted in 100 mL SDW; T10 - Fungicide Captana (240 g / 100 kg of seeds) and inoculated with Fov. The pathogen incidence of the seeds was evaluated seven days after the inoculation (DAI). To evaluate the biological control of Fov in the seedlings, the treated seeds were submitted to the following inoculation methods: 1 - inoculation of the substrate with a pathogen conidia suspension; 2 - immersion of the seeds in the conidia suspension and 3 - direct contact of the seeds with the pathogen mycelium. Twenty-one DAI the disease severity and percentage of seedlings with vascular darkening were evaluated. It was observed a transmission rate of 64.0 to 89.0% of the seeds to the seedlings. Trichodel® reduced the incidence and severity of Fov in the cotton seedlings and was the most efficient product.

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“…was studied and it was cleared that disease severity decreased in rice infected seeds treated with bacteria (Moura et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Identification of Non-Pathogenic Fungi of Rice and the Evaluation of Their Effect on Biological Control of Bipolaris Oryzae, the Causal Agent of Rice Brown Spot Disease in Vitro

Motlagh¹,

Mohammadian²

2017

AgricultForest

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SUMMARYRice brown spot disease is caused by Bipolaris oryzae is an important disease of rice in Iran and other parts of the world. In this research, 137 infected samples of rice were collected from paddy fields of Guilan province in Iran and 68 fungal isolates were isolated. PDA and WA media were used for isolation and identification of fungi. Morphological characteristics such as colony, conidia and conidiophores morphology were used for identification of these fungi. It was found that the isolated fungi belonged to Bipolaris oryzae, Alternaria tenuissima, Preussia sp., Fusarium verticillioides, Alternaria infectoria, Alternaria citri, Trichoderma harzianum and Trichoderma virens. Twenty isolates that didn't cause disease on rice or pathogenicity of them in rice was very low were selected for biocontrol studies and to do so, various methods were used. It was shown that seven isolates, T. harzianum, T. virens, A. tenuissima, Preussia sp., F. verticillioides, A. infectoria and A. citri, had the highest suppression percentage of mycelial growth of B. oryzae, respectively, in dual culture and culture filtrate methods. In volatile metabolites method, T. harzianum, T. virens, A. tenuissima, A. infectoria, A. citri, Preussia sp. and F. verticillioides, had the highest inhibition percentage of mycelial growth of B. oryzae, respectively. In hyperparasitism test, no coiling of Trichoderma spp. was observed around the hyphae of B. oryzae, however, Alternaria spp. penetrated into the mycelium of B. oryzae once they reached them and then, they tore the fungal mycelium and deformed it. Based on obtained results, T. harzianum was the most effective isolate in inhibiting the mycelial growth of B. oryzae. Analysis of variance and means comparison by least significant difference showed significant differences among the fungi used in vitro.

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Biocontrol and seed transmission of Bipolaris oryzae and Gerlachia oryzae to rice seedlings

Cited by 11 publications

References 17 publications

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

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

Biocontrol Potential of Trichoderma and Bacillus Species on Fusarium oxysporum f. sp vasinfectum

Identification of Non-Pathogenic Fungi of Rice and the Evaluation of Their Effect on Biological Control of Bipolaris Oryzae, the Causal Agent of Rice Brown Spot Disease in Vitro

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