Abstract
In 1993, hymenia of Thanatephorus cucumeris occurred on petioles of sugar beet leaves, but disease was not observed on leaves, crowns, or roots. Of 33 cultures isolated from sugar beet, 28 were identified as Rhizoctonia solani AG-3 (from four fields planted to potatoes in 1992) and five isolates were AG-5 (from one field planted to wheat in 1992). These isolates of R. solani AG-3 and AG-5 were nonpathogenic to moderately pathogenic on sugar beet seedlings (stands ranged from 49 to 95%). The same isolates were nonpathogenic when inoculated on 8-week-old sugar beet roots (root rot indices were ≤1 [0 to 7 scale]). All isolates of R. solani AG-3 (but none of AG-5) formed sclerotia on roots. Disease indices (0 to 4 scale) on potato sprouts at 10°C were low, did not differ significantly (P = 0.05) among isolates and the control in either of two experiments, and averaged 0.9 for 14 isolates of AG-3, 0.5 for three isolates of AG-5, and 0.5 in the control. All isolates of AG-3 (but none of AG-5) formed sclerotia on potato seed pieces. When potato sprouts were grown at 25°C, disease indices were low (averaged 0.4 in each of two experiments), but four isolates of AG-3 and three of AG-5 had disease indices significantly (P = 0.05) higher than those of the uninoculated control. Sclerotia were not observed. The presence of hymenia of T. cucumeris is significant in that sexual reproduction and inoculum production occurred on a nonhost crop and were related to AGs of R. solani associated with the previous crop (AG-3 for potato and AG-5 for wheat).
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Claims 18
Claim · model-written summary
T. cucumeris hymenia occurred on sugar beet petioles in 1993.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarise0 - Organ / stage
- petiolese0
- Interactor
- Thanatephorus cucumeris
Thanatephorus cucumerise0pathogen - Outcome
- hymenia of Thanatephorus cucumeris occurrede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1993, hymenia of Thanatephorus cucumeris occurred on petioles of sugar beet leaves”
Claim · model-written summary
No disease appeared on sugar beet leaves, crowns or roots.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Organ / stage
- leaves, crowns, or rootse0
- Outcome
- disease was not observede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“disease was not observed on leaves, crowns, or roots”
t0“Sugar Beet”
Claim · model-written summary
Twenty-eight of 33 sugar beet isolates were R. solani AG-3.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Interactor
- Rhizoctonia solani AG-3
Rhizoctonia solani AG-3e0pathogen - Outcome
- identified as Rhizoctonia solani AG-3e0
- Value
- 28e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Of 33 cultures isolated from sugar beet, 28 were identified as Rhizoctonia solani AG-3”
Claim · model-written summary
Five sugar beet isolates were AG-5.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Interactor
- AG-5e0pathogen
- Outcome
- isolates were AG-5e0
- Value
- fivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“five isolates were AG-5”
e1“cultures isolated from sugar beet”
Claim · model-written summary
AG-3 and AG-5 isolates ranged from nonpathogenic to moderately pathogenic on sugar beet seedlings, with 49 to 95% stands.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Organ / stage
- seedlingse0
- Treatment
- R. solani AG-3 and AG-5e0
- Interactor
- R. solani AG-3Rhizoctonia solanie0pathogen
- Second interactor
- AG-5e0pathogen
- Outcome
- standse0
- Value
- 49 to 95%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These isolates of R. solani AG-3 and AG-5 were nonpathogenic to moderately pathogenic on sugar beet seedlings (stands ranged from 49 to 95%)”
Claim · model-written summary
AG-3 and AG-5 were nonpathogenic on 8-week-old sugar beet roots, with rot indices ≤1.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Organ / stage
- 8-week-old sugar beet rootse0
- Treatment
- inoculatede0
- Outcome
- root rot indicese0
- Value
- ≤1e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The same isolates were nonpathogenic when inoculated on 8-week-old sugar beet roots (root rot indices were ≤1 [0 to 7 scale])”
Claim · model-written summary
All AG-3 isolates formed sclerotia on sugar beet roots.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Interactor
- R. solani AG-3Rhizoctonia solanie0pathogen
- Outcome
- formed sclerotia on rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All isolates of R. solani AG-3 (but none of AG-5) formed sclerotia on roots”
t0“Sugar Beet”
Claim · model-written summary
No AG-5 isolates formed sclerotia on sugar beet roots.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Interactor
- AG-5e0pathogen
- Outcome
- none of AG-5) formed sclerotia on rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All isolates of R. solani AG-3 (but none of AG-5) formed sclerotia on roots”
t0“Sugar Beet”
Claim · model-written summary
At 10°C potato sprout disease indices were low and did not differ significantly among isolates and control.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- isolatese0
- Outcome
- Disease indicese0
- Direction
- did not differe0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease indices (0 to 4 scale) on potato sprouts at 10°C were low, did not differ significantly (P = 0.05) among isolates and the control in either of two experiments”
Claim · model-written summary
At 10°C AG-3 potato disease index averaged 0.9.
- Taxon
- potatoSolanum tuberosume1
- Interactor
- AG-3e0pathogen
- Outcome
- Disease indicese1
- Value
- 0.9e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“averaged 0.9 for 14 isolates of AG-3”
e1“Disease indices (0 to 4 scale) on potato sprouts at 10°C”
Claim · model-written summary
At 10°C AG-5 potato disease index averaged 0.5.
- Taxon
- potatoSolanum tuberosume1
- Interactor
- AG-5e0pathogen
- Outcome
- Disease indicese1
- Value
- 0.5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.5 for three isolates of AG-5”
e1“Disease indices (0 to 4 scale) on potato sprouts at 10°C”
Claim · model-written summary
At 10°C control potato disease index averaged 0.5.
- Taxon
- potatoSolanum tuberosume1
- Outcome
- Disease indicese1
- Value
- 0.5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.5 in the control”
e1“Disease indices (0 to 4 scale) on potato sprouts at 10°C”
Claim · model-written summary
AG-3 but no AG-5 formed sclerotia on potato seed pieces.
- Taxon
- potatoSolanum tuberosume0
- Interactor
- AG-3e0pathogen
- Outcome
- formed sclerotia on potato seed piecese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All isolates of AG-3 (but none of AG-5) formed sclerotia on potato seed pieces”
Claim · model-written summary
At 25°C potato sprout disease indices were low, averaging 0.4 in both experiments.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- disease indicese0
- Value
- 0.4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When potato sprouts were grown at 25°C, disease indices were low (averaged 0.4 in each of two experiments)”
Claim · model-written summary
Four AG-3 isolates produced significantly higher disease indices than potato controls at 25°C.
- Taxon
- potatoSolanum tuberosume1
- Treatment
- four isolates of AG-3e0
- Interactor
- AG-3e0pathogen
- Outcome
- disease indicese0
- Direction
- highere0
- Comparator
- uninoculated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four isolates of AG-3 and three of AG-5 had disease indices significantly (P = 0.05) higher than those of the uninoculated control”
e1“potato sprouts were grown at 25°C”
Claim · model-written summary
Three AG-5 isolates produced significantly higher disease indices than potato controls at 25°C.
- Taxon
- potatoSolanum tuberosume1
- Treatment
- three of AG-5e0
- Interactor
- AG-5e0pathogen
- Outcome
- disease indicese0
- Direction
- highere0
- Comparator
- uninoculated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four isolates of AG-3 and three of AG-5 had disease indices significantly (P = 0.05) higher than those of the uninoculated control”
e1“potato sprouts were grown at 25°C”
Claim · model-written summary
No sclerotia were observed at 25°C.
- Taxon
- potatoSolanum tuberosume1
- Outcome
- Sclerotia were not observede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sclerotia were not observed”
e1“potato sprouts were grown at 25°C”
Claim · model-written summary
T. cucumeris sexual reproduction and inoculum production occurred on nonhost sugar beet.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Interactor
- T. cucumerisThanatephorus cucumerise1pathogen
- Outcome
- sexual reproduction and inoculum production occurrede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sexual reproduction and inoculum production occurred on a nonhost crop”
t0“Sugar Beet”
e1“hymenia of T. cucumeris”
The same questions in other papers
inoculation · disease · Beta vulgaris (beet)Positive and negative results
6 papers in the same direction as this paper · 16 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
20 papers more in this group
See all 24 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.