Survey of Magnaporthe grisea Isolates around Andhra Pradesh and Telangana States, India

Surapu, Ramesh Babu; Srinivas, P.S.; Aruna, Justina Olufunke; Vijay, Shirke Shrinivas; Rani, P.Ch. Durga; Reddy, N. Sivarami; Prasad, Milan

doi:10.20546/ijcmas.2017.605.008

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…The main focus of the current research is how fungicides, particularly with the novel combinations that are on the market, can be utilized to control this disease in Bangladesh. The current study's findings showed that fungicides containing Picoxystrobin 6.70%+ Tricyclazole 20.33%, Tebuconazole 50%+ Trifloxystrobin 25% WG, and Pyrachlostrobin 10% were more effective at controlling Magnaporthe oryzae than fungicides containing Tricyclazole 75%, Propiconazole 12.5%+ Tricyclazole 40%, and 200 g/L azoxystrobin + 125 g. These results are consistent with those of Surapu et al (2017), who found that Tricyclazole completely inhibited growth at 800 ppm and at a maximum of 600 ppm under in vitro conditions. Sultana R. (2019) found that Trifloxistrobin 25% + Tebuconazol 50%, Tebuconazol, Hexaconazol, Mancozeb, Zineb 68%+ Hexaconazole l4% and Carbendazim containing fungicides were more effective in controlling P. oryzae compared to Tricyclazole, Metalaxyl, Zineb, Pyraclostrobin, Metiram, Copper oxychloride containing fungicides.…”

Section: Discussionsupporting

confidence: 91%

Assessing the Effectiveness of Newly Developed Fungicides in Managing Rice Blast Disease

Akter¹,

Haque²,

Farthouse³

et al. 2023

J. Agrofor. Environ.

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Rice blast, which is caused by the fungus Magnaporthe oryzae, is a highly destructive disease that poses a significant threat to rice cultivation. It results in considerable crop damage, affecting both the yield and quality of rice. This makes rice blast a major concern for farmers and a significant issue in terms of food production. These studies were carried out at Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh with the aim to manage rice blast disease by means of different fungicides under in in-vitro and field conditions. In-vitro bioassay of six chemical fungicide(s) viz. Amister top 325SC, Seltima, Nativo 75 WG, Filia 525 SE, Avalon 27SC and Trooper 75 WP was done against Magnaporthe oryzae following poison food technique in the Plant Pathology Lab of BINA. The maximum mycelial growth inhibition (73.43%) of Magnaporthe oryzae was obtained by Avalon 27SC (Picoxystrobin 6.70%+ Tricyclazole 20.33%), Nativo 75WG (Tebuconazol 50% + Trifloxistrobin25%) and Seltima (Pyrachlostrobin 10%) at 0.0125% concentrations and 100% growth inhibition was obtained by all the six fungicides at 0.1% and 0.5% concentrations. In vivo evaluation of five fungicides viz. Amister top 325SC, Seltima, Nativo 75 WG, Filia 525 SE and Avalon 27SC against rice blast was carried out in research plot of the Plant Pathology of BINA. From the result, it was concluded that all the fungicides were effective in controlling leaf blast but Avalon 27SC (Picoxystrobin 6.70%+ Tricyclazole 20.33%) @ 0.2% was more effective among other fungicides, showing least leaf blast severity mean at three time interval (1.00, 1.33 and 1.46), least incidence (11.90%, 15.08%, 16.67%), and the highest grain yield (7.58 t ha-1).

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Section: Discussionsupporting

confidence: 91%

Assessing the Effectiveness of Newly Developed Fungicides in Managing Rice Blast Disease

Akter¹,

Haque²,

Farthouse³

et al. 2023

J. Agrofor. Environ.

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“…The entire nursery block, as well as each entry, was surrounded by HR12 (susceptible cultivar) on four sides for spreading the disease evenly. A mixture of M. oryzae isolates collected from different blast hotspot regions of Andhra Pradesh and Telangana ( Surapu et al, 2017 ) were used to screen landraces for the leaf blast disease. The plants were spread with inoculum at the two-leaf stage and the score was taken once the susceptible check gets totally infected with blast disease.…”

Section: Methodsmentioning

confidence: 99%

Diverse Rice Landraces of North-East India Enables the Identification of Novel Genetic Resources for Magnaporthe Resistance

et al. 2017

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North-East (NE) India, the probable origin of rice has diverse genetic resources. Many rice landraces of NE India were not yet characterized for blast resistance. A set of 232 landraces of NE India, were screened for field resistance at two different hotspots of rice blast, viz., IIRR-UBN, Hyderabad and ICAR-NEH, Manipur in two consecutive seasons. The phenotypic evaluation as well as gene profiling for 12 major blast resistance genes (Pitp, Pi33, Pi54, Pib, Pi20, Pi38, Pita2, Pi1, Piz, Pi9, Pizt, and Pi40) with linked as well as gene-specific markers, identified 84 resistant landraces possessing different gene(s) either in singly or in combinations and also identified seven resistant landraces which do not have the tested genes, indicating the valuable genetic resources for blast resistance. To understand the molecular diversity existing in the population, distance and model based analysis were performed using 120 SSR markers. Results of both analyses are highly correlated by forming two distinct subgroups and the existence of high diversity (24.9% among the subgroups; 75.1% among individuals of each subgroup) was observed. To practically utilize the diversity in the breeding program, a robust core set having an efficiency index of 0.82 which consists of 33 landraces were identified through data of molecular, blast phenotyping, and important agro-morphological traits. The association of eight novel SSR markers for important agronomic traits which includes leaf and neck blast resistance was determined using genome-wide association analysis. The current study focuses on identifying novel resources having field resistance to blast as well as markers which can be explored in rice improvement programs. It also entails the development of a core set which can aid in representing the entire diversity for efficiently harnessing its properties to broaden the gene pool of rice.

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“…In our study, the pathogen showed varying degrees of growth in colony diameter. Surapu et al, (2017) revealed that, variation in culture growth due to autolysis of mycelium. The isolated pathogen produced pear shaped conidia with rounded base and narrowed towards the tip having 2 septations, thus 3 celled conidia of similar characters was observed in all the isolates in our study.…”

Section: Pathogenicitymentioning

confidence: 99%

Morphological and Pathogenic Variability of Magnaporthe oryzae, the Incitant of Rice Blast

Rahila¹,

Harish²,

Kalpana³

et al. 2020

Int.J.Curr.Microbiol.App.Sci

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Survey of Magnaporthe grisea Isolates around Andhra Pradesh and Telangana States, India

Cited by 4 publications

References 2 publications

Assessing the Effectiveness of Newly Developed Fungicides in Managing Rice Blast Disease

Assessing the Effectiveness of Newly Developed Fungicides in Managing Rice Blast Disease

Diverse Rice Landraces of North-East India Enables the Identification of Novel Genetic Resources for Magnaporthe Resistance

Morphological and Pathogenic Variability of Magnaporthe oryzae, the Incitant of Rice Blast

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