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| Infection characteristics of Rhizoctonia solaniisolated from tabacco |
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| DOI： |
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| Abstract: |
| This…paper…studied…the…infection…methods…and…parts， infection…period， infection…conditions…and…interactive…
pathogenicity…of…Rhizoctonia solani…isolated…from…tabacco.…The…results…showed…that…wound…was…beneficial…for…the…infection…
of R.solani.…The…tobacco…leaf， leaf…vein， each…part…of…stem…and…roots…could…be…infected…by…the…pathogen.…Pathogen-
infecting…favorable…stage…of…tobacco…plant…was…seedling…stage， and…the…disease…rate…under…non-wound…inoculation…condition…
reduced…significantly…with…the…the…growth…of…tobacco…plant.…At…25℃-30℃， the…pathogen…infection…was…strong， and…the…
pathogen…could…not…infect…tobacco…under…15℃.…With…the…decrease…of…soil…moisture…in…the…range…of…47.83%-76.41%， the…
disease…index…would…increase.…The…results…of…modified…selective…medium…testing…showed…that…the…higher…the…amount…of…
soil…pathogens…had， the…severer…the…disease…occured.…Interactive…pathogenicity…test…indicated…that…R.solani…isolated…from…
tabacco…could…infect…rice…and…corn， and…R.solani…isolated…from…rice…and…corn…also…could…cause…the…occurrence…of…tobacco…
damping-off. |
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