Abstract
The effectiveness of various seed-tuber treatments was evaluated for control of silver scurf on potato (Solanum tuberosum), caused by Helminthosporium solani, at four locations in Washing-ton and Oregon using seed-tubers from the same source. Disease incidence was determined at harvest and following storage, and differed significantly among locations. The highest incidence of disease was observed at Redmond, OR and the lowest was at Hermiston, OR. Significantly less silver scurf occurred on progeny-tubers, regardless of location, when seed was treated with the fungicide treatments fludioxonil, fludioxonil + quintozene, azoxystrobin, or thiophanate-methyl + mancozeb compared with the nontreated control. A sample of H. solani from seed planted in the Columbia Basin of Washington and Oregon was assessed for resistance to thia-bendazole (TBZ) and thiophanate-methyl (TPM). Sensitivity of 20 isolates of H. solani to TBZ was determined on V8 media amended with TBZ. Four isolates, selected as a subset from the 20 isolates tested for TBZ sensitivity, were tested for resistance to TPM, mancozeb, and TPM + mancozeb on amended V8 media. Isolates differed significantly in sensitivity to both chemicals. Thirteen isolates out of the 20 tested were resistant to TBZ. One out of the four subsets of isolates was resistant to both TBZ and TPM. TBZ sensitivity was not related to geographic origin of the isolates. Variation in resistance was evident on a small scale as seen with one resistant and one sensitive isolate collected from the same tuber. This is the first report that silver scurf incidence is affected by location despite the same tuber-seed source and also the first report of TBZ and TPM resistant isolates of H. solani from the Columbia Basin (Oregon and Washington) production area.
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Claims 12
Claim · model-written summary
Silver scurf incidence differed significantly among locations.
- Taxon
- potato
Solanum tuberosume1 - Interactor
- Helminthosporium solani
.jpg?width=60)
Helminthosporium solanie1pathogen - Outcome
- Disease incidencee0
- Setting
- locationse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Disease incidence was determined at harvest and following storage, and differed significantly among locations.”
e1“silver scurf on potato (Solanum tuberosum), caused by Helminthosporium solani”
Claim · model-written summary
Disease incidence was highest at Redmond, OR.
- Taxon
- potatoSolanum tuberosume1
- Interactor
- Helminthosporium solaniHelminthosporium solanie1pathogen
- Outcome
- incidence of diseasee0
- Direction
- higheste0
- Setting
- Redmond, ORe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest incidence of disease was observed at Redmond, OR and the lowest was at Hermiston, OR.”
e1“silver scurf on potato (Solanum tuberosum), caused by Helminthosporium solani”
Claim · model-written summary
Disease incidence was lowest at Hermiston, OR.
- Taxon
- potatoSolanum tuberosume1
- Interactor
- Helminthosporium solaniHelminthosporium solanie1pathogen
- Outcome
- incidence of diseasee0
- Direction
- loweste0
- Setting
- Hermiston, ORe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest incidence of disease was observed at Redmond, OR and the lowest was at Hermiston, OR.”
e1“silver scurf on potato (Solanum tuberosum), caused by Helminthosporium solani”
Claim · model-written summary
Fludioxonil seed treatment significantly reduced silver scurf on progeny tubers versus the nontreated control regardless of location.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- progeny-tuberse0
- Treatment
- fludioxonile0
- Outcome
- silver scurfe0
- Direction
- lesse0
- Qualifier
- regardless of locatione0
- Comparator
- nontreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significantly less silver scurf occurred on progeny-tubers, regardless of location, when seed was treated with the fungicide treatments fludioxonil, fludioxonil + quintozene, azoxystrobin, or thiophanate-methyl + mancozeb compared with the nontreated control.”
t0“Potato”
Claim · model-written summary
Fludioxonil plus quintozene seed treatment significantly reduced silver scurf versus the nontreated control regardless of location.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- progeny-tuberse0
- Treatment
- fludioxonil + quintozenee0
- Outcome
- silver scurfe0
- Direction
- lesse0
- Comparator
- nontreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significantly less silver scurf occurred on progeny-tubers, regardless of location, when seed was treated with the fungicide treatments fludioxonil, fludioxonil + quintozene, azoxystrobin, or thiophanate-methyl + mancozeb compared with the nontreated control.”
t0“Potato”
Claim · model-written summary
Azoxystrobin seed treatment significantly reduced silver scurf versus the nontreated control regardless of location.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- progeny-tuberse0
- Treatment
- azoxystrobine0
- Outcome
- silver scurfe0
- Direction
- lesse0
- Comparator
- nontreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significantly less silver scurf occurred on progeny-tubers, regardless of location, when seed was treated with the fungicide treatments fludioxonil, fludioxonil + quintozene, azoxystrobin, or thiophanate-methyl + mancozeb compared with the nontreated control.”
t0“Potato”
Claim · model-written summary
Thiophanate-methyl plus mancozeb seed treatment significantly reduced silver scurf versus the nontreated control regardless of location.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- progeny-tuberse0
- Treatment
- thiophanate-methyl + mancozebe0
- Outcome
- silver scurfe0
- Direction
- lesse0
- Comparator
- nontreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significantly less silver scurf occurred on progeny-tubers, regardless of location, when seed was treated with the fungicide treatments fludioxonil, fludioxonil + quintozene, azoxystrobin, or thiophanate-methyl + mancozeb compared with the nontreated control.”
t0“Potato”
Claim · model-written summary
Pathogen isolates differed significantly in sensitivity to the tested chemicals.
- Taxon
- H. solaniHelminthosporium solanie2
- Outcome
- sensitivity to both chemicalse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Isolates differed significantly in sensitivity to both chemicals.”
e1“Four isolates, selected as a subset from the 20 isolates tested for TBZ sensitivity, were tested for resistance to TPM, mancozeb, and TPM + mancozeb on amended V8 media.”
e2“20 isolates of H. solani”
Claim · model-written summary
Thirteen of twenty H. solani isolates were resistant to TBZ.
- Taxon
- H. solaniHelminthosporium solanie1
- Outcome
- resistant to TBZe0
- Value
- Thirteen isolates out of the 20e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thirteen isolates out of the 20 tested were resistant to TBZ.”
e1“20 isolates of H. solani”
Claim · model-written summary
One of four subset isolates was resistant to both TBZ and TPM.
- Taxon
- H. solaniHelminthosporium solanie1
- Outcome
- resistant to both TBZ and TPMe0
- Value
- One out of the foure0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One out of the four subsets of isolates was resistant to both TBZ and TPM.”
e1“20 isolates of H. solani”
Claim · model-written summary
TBZ sensitivity was not related to isolate geographic origin.
- Taxon
- H. solaniHelminthosporium solanie1
- Outcome
- TBZ sensitivitye0
- Setting
- geographic origine0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TBZ sensitivity was not related to geographic origin of the isolates.”
e1“20 isolates of H. solani”
Claim · model-written summary
One resistant and one sensitive H. solani isolate were collected from the same tuber.
- Taxon
- H. solaniHelminthosporium solanie1
- Outcome
- one resistant and one sensitive isolatee0
- Qualifier
- collected from the same tubere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Variation in resistance was evident on a small scale as seen with one resistant and one sensitive isolate collected from the same tuber.”
e1“20 isolates of H. solani”
The same questions in other papers
azoxystrobin · nutrient: content · Solanum tuberosum (potato)Positive and negative results
1 in the opposite direction
- negative
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.