Efficiency of different Rhizoctonia solani inoculum source against sheath blight screening in rice under field conditions

Sheath blight caused by Rhizoctonia solani is a major rice disease worldwide and causes serious yield losses. To identify quantitative differences in disease development, four inoculum sources, viz. typha bit, maize-sand meal medium, rice grain-rice hull and tooth pick were evaluated against twelve...

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Bibliographic Details
Published in:Tropical plant pathology 2022-04, Vol.47 (2), p.309-313
Main Authors: Hunjan, Mandeep Singh, Kumar, Sanjay, Lore, Jagjeet Singh, Cruz, Casiana M Vera
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Blight
Disease resistance
Evaluation
Genotypes
Inoculation
Inoculum
Life Sciences
Plant Pathology
Rhizoctonia solani
Rice
Rice hulls
Sheath blight
Sheaths
Short Communication
Teeth
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Summary:Sheath blight caused by Rhizoctonia solani is a major rice disease worldwide and causes serious yield losses. To identify quantitative differences in disease development, four inoculum sources, viz. typha bit, maize-sand meal medium, rice grain-rice hull and tooth pick were evaluated against twelve rice genotypes using artificial inoculation conditions for 2 years. Relative lesion height (RLH) was measured at 7, 14 and 21 days after inoculation. Disease incidence was recorded at 21 days post inoculation. Inoculum sources significantly affected disease development. Typha bit inoculation showed the highest RLH (55.1%) as well as area under disease progress curve (AUDPC) (828.8), while the lowest disease development occurred with tooth pick inoculum (RLH 47.1% and AUDPC 626.8). The interaction between genotypes and inoculum sources was significant. Rice varieties Tetep and Taducan showed the lower RLH and AUDPC as compared to all other genotypes with different inoculum sources. These results provide a basis to design methods of evaluation for sheath blight resistance with high precision in rice genotypes.
ISSN:1983-2052
1982-5676
1983-2052
DOI:10.1007/s40858-021-00489-3