Comparison among four triazole fungicides on growth and development of sheath blight of rice pathogen<i>Rhizoctonia solani</i>Kühn AG1-1A

Datta, Sambit; Dey, Parna; Sarkar, Abhijit; Tarafdar, Jayanta; Chowdhury, Ashim

doi:10.1080/03235408.2016.1181945

Cited by 7 publications

(3 citation statements)

References 22 publications

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“…Difenoconazole and tebuconazole were effective against both strains of R. solani tested in vitro trials. This is in accord with other studies that showed the e cacy of these two fungicides against R. solani (Shan-lin 2013; Datta et al 2016). In addition, our results show that the cultivation of sugar beet seeds in PDA medium containing difenoconazole caused no damage to seedlings.…”

Section: Discussionsupporting

confidence: 92%

Identification, pathogenicity, fungicide sensitivity and biological control of Rhizoctonia solani associated with damping-off disease of sugar beet in Morocco

Farhaoui¹,

Tahiri²,

Ezrari³

et al. 2022

Preprint

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The fungus Rhizoctonia solani Kühn is an economically important pathogen involved in root rot and seedling damping-off disease of sugar beet (Beta vulgaris L.). In Morocco, this is the first detailed report of R. solani as the causative agent of sugar beet damping-off. The identification of the pathogen was based on combining the morphological characteristics and molecular characterization using the ribosomal DNA internal transcribed spacer (rDNA ITS) region. Antifungal activities of four commercial fungicides; azoxystrobin, difenoconazole, tebuconazole, and trifloxystrobin were assessed in vitro, displaying effective inhibition of the mycelial growth of the pathogen strains using PDA medium. A commercially available Bacillus subtilis Y1336 was evaluated as a potential biological control agent (BCA) against seedling damping-off caused by R. solani. The biological control activities of B. subtilis Y1336 was demonstrated by dual culture bioassays on PDA medium, in vitro seed inoculation with R. solani and B. subtilis, and by applying the BCA as seed coat under greenhouse conditions. This is the first time that the commercially available B. subtilis Y1336 has been proved as an effective BCA against the damping-off disease of sugar beet. This commercial antagonist should be incorporated into the integrated disease management startegy for sugar beet seedling mortality together with effective tested fungicides.

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Section: Discussionsupporting

confidence: 92%

Identification, pathogenicity, fungicide sensitivity and biological control of Rhizoctonia solani associated with damping-off disease of sugar beet in Morocco

Farhaoui¹,

Tahiri²,

Ezrari³

et al. 2022

Preprint

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“…Management of these fungal soilborne pathogens is challenging since the fungal propagules exist in the soil, causing difficulties in controlling them. Synthetic fungicide applications such as triazole, carbendazim, carboxin, and thiram have been used to suppress the growth of R. solani (Akhter et al 2015;Datta et al 2016). However, continuous application of fungicides, particularly in an endemic area is considered unfriendly environmental control, that may affect other living organisms such as beneficial soil microbes, and also leading to strain resistance to certain active compounds of the fungicides (Sundaramoorthy and Balabaskar 2013).…”

Section: Introductionmentioning

confidence: 99%

Isolation of antagonistic fungi from rhizospheres and its biocontrol activity against different isolates of soil borne fungal pathogens infected legumes

2019

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Abstract. Yusnawan E, Inayati A, Baliadi Y. 2019. Isolation of antagonistic fungi from rhizospheres and its biocontrol activity against different isolates of soil borne fungal pathogens infected legumes. Biodiversitas 20: 2048-2054. Soilborne diseases caused by Rhizoctonia solani and Fusarium sp. are biotic limits for legume production. Biological controls offer environmental friendly control for these pathogens. This study aimed to isolate and screen Trichoderma from different rhizospheres and to obtain effective Trichoderma isolates to suppress in vitro growth of the soil borne pathogens. The antagonistic inhibitory activity was performed by dual culture method. Seven out of forty indigenous Trichoderma isolates collected from East Java, Indonesia effectively suppressed the growth of different fungal isolates, namely Rhizoctonia solani (R.s1), R. solani (R.s2) as well as Fusarium sp. which infected soybean and mung bean. In vitro study showed different suppression of the pathogens on dual culture tests. The seven isolates inhibited the growth of R. solani (R.s1), R.solani (R.s2) and Fusarium sp. ranging from 90.0 to 99.6%, 72.8 to 82.4%, and 67.9 to 90.8%, respectively. Isolate origin and genetic variability of Trichoderma played an important role in the antagonistic activity. The fast-growing of selected Trichoderma showed their abilities for space occupation and nutrition competition, which involved in the antagonistic activity. The mycelial growth of Trichoderma over pathogens showed hyperparasitism mechanism. In addition, coiling of Trichoderma over hyphal pathogens was observed during microscopic observation. The seven Trichoderma isolates, therefore, are promising as biological control agents against the soil borne fungi infected legumes.

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“…12 Therefore, effective control of sheath blight in rice is mainly achieved by the application of chemical fungicides. 13 Nonhost resistance can be another alternative to host resistance and chemical control against R. solani. Nonhost disease resistance is considered more durable against most studied pathogens and it works against all isolates of a specific pathogen.…”

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confidence: 99%

Exploring natural variation for rice sheath blight resistance in Brachypodium distachyon

Gill

Lee²,

Jia

et al. 2018

Plant Signaling & Behavior

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Sheath blight caused by the soil borne fungus Rhizoctonia solani AG1-IA is one of the major diseases of rice in the world. Genetic resistance in rice against this disease has not been very successful. Brachypodium distachyon is considered as a model species for several cereal crops and it has been studied in the past to identify novel sources of disease resistance against cereal crop diseases. Therefore, the current study was designed to explore nonhost disease resistance in Brachypodium accessions against sheath blight pathogen of rice, Rhizoctonia solani. A total of 19 Brachypodium distachyon accessions were screened for resistance against Rhizoctonia solani AG1-IA. Different levels of resistance reactions were observed among accessions. Quantification of jasmonic acid (JA) and salicylic acid (SA) concentration in selected resistant (Bd3-1), moderately susceptible (Bd21), and susceptible (Bd30-1) inbred accessions revealed that Bd3-1 accumulated more JA upon pathogen infection compared to Bd21 or Bd30-1. In contrary, no differences were observed for SA accumulation in tested accessions suggesting that the resistance to R. solani in Brachypodium is due to an SA-independent defense pathway. Our study provides a new foundation to explore this area for more durable resistance against this disease. ARTICLE HISTORY

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Comparison among four triazole fungicides on growth and development of sheath blight of rice pathogenRhizoctonia solaniKühn AG1-1A

Cited by 7 publications

References 22 publications

Identification, pathogenicity, fungicide sensitivity and biological control of Rhizoctonia solani associated with damping-off disease of sugar beet in Morocco

Identification, pathogenicity, fungicide sensitivity and biological control of Rhizoctonia solani associated with damping-off disease of sugar beet in Morocco

Isolation of antagonistic fungi from rhizospheres and its biocontrol activity against different isolates of soil borne fungal pathogens infected legumes

Exploring natural variation for rice sheath blight resistance in Brachypodium distachyon

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