Abstract
Single applications of liquid swine manure (LSM; ca. 49 hL/ha), ammonium lignosulfonate (ALS; a product derived from the pulp and paper processing industry, 50% solids at ca. 10 hL/ha), and Nature Safe (NS) 10:2:8 (N:P:K; an organic fertilizer made primarily of poultry feathers, ca. 8.6 t/ha) were made at two commercial potato (Solanum tuberosum) fields (sites P-I and P-II) in Prince Edward Island in the spring of 1999. Potato tubers were planted 3 weeks later and again in 2000 and 2001 without further addition of amendments. The effects on potato scab, black scurf, silver scurf, fusarium dry rot, verticillium wilt, and tuber yield were determined. Potato scab severity was significantly reduced (77%–84%) by NS compared with the controls at both sites in the first year. Scab severity remained significantly lower in the second year, but there was no difference from the controls in the third year. ALS significantly reduced scab severity (54%) compared with the controls at both sites in the first year, and scab severity remained lower than the control at only one site (P-I) and only for the second year. The mechanism by which ALS reduced scab severity is not known. LSM significantly reduced scab severity (38%) at one site only (P-II) and only in the first year. The control at site P-II was likely due to the favourable pH (5.4) for biotoxic activity of volatile fatty acids (VFAs) in the LSM, whereas the soil pH of 6.4 at site P-I was unfavourable for VFA toxicity to Streptomyces scabiei. The severity of black scurf was significantly reduced compared with the control at both sites by LSM (51% at P-I and 48% at P-II) and NS (40% at P-I and 61% at P-II) but in the first year only. There was no significant effect on the severity of silver scurf or fusarium dry rot or tuber yield by any amendment in any year. Verticillium wilt was significantly reduced compared with the control by ALS (88%) and NS (66%) at only one site (P-I) and only in the second year. Marketable yield was increased at both sites for NS and ALS, and at one site for LSM.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 19
Claim · model-written summary
Nature Safe reduced potato scab severity by 77%–84% at both sites in year one.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- NSe0
- Outcome
- Potato scab severitye0
- Direction
- reducede0
- Value
- 77%–84%e0
- Qualifier
- both sites in the first yeare0
- Comparator
- the controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato scab severity was significantly reduced (77%–84%) by NS compared with the controls at both sites in the first year”
t0“potato tuber disease”
Claim · model-written summary
Nature Safe kept potato scab severity significantly lower in year two.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- NSe1
- Outcome
- Scab severitye0
- Direction
- lowere0
- Qualifier
- second yeare0
- Comparator
- the controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“Scab severity remained significantly lower in the second year, but there was no difference from the controls in the third year”
e1“by NS compared with the controls at both sites in the first year”
Claim · model-written summary
Nature Safe scab severity did not differ from controls in year three.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- NSe1
- Outcome
- Scab severitye0
- Direction
- no differencee0
- Qualifier
- third yeare0
- Comparator
- the controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“Scab severity remained significantly lower in the second year, but there was no difference from the controls in the third year”
e1“by NS compared with the controls at both sites in the first year”
Claim · model-written summary
ALS reduced potato scab severity 54% at both sites in year one.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ALSe0
- Outcome
- scab severitye0
- Direction
- reducede0
- Value
- 54%e0
- Comparator
- the controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“ALS significantly reduced scab severity (54%) compared with the controls at both sites in the first year”
Claim · model-written summary
ALS maintained lower potato scab severity only at P-I in year two.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ALSe1
- Outcome
- scab severitye0
- Direction
- lowere0
- Comparator
- the controle0
- Setting
- P-Ie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“scab severity remained lower than the control at only one site (P-I) and only for the second year”
e1“ALS significantly reduced scab severity”
Claim · model-written summary
LSM reduced potato scab severity 38% only at P-II in year one.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- LSMe0
- Outcome
- scab severitye0
- Direction
- reducede0
- Value
- 38%e0
- Setting
- P-IIe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“LSM significantly reduced scab severity (38%) at one site only (P-II) and only in the first year”
Claim · model-written summary
The authors attributed the site-specific LSM scab control to pH-dependent toxicity of volatile fatty acids against Streptomyces scabiei.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- LSMe0
- Interactor
- Streptomyces scabieiStreptomyces scabieie0pathogen
- Compound
- volatile fatty acidse0
- Outcome
- control at site P-IIe0
- Qualifier
- likelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The control at site P-II was likely due to the favourable pH (5.4) for biotoxic activity of volatile fatty acids (VFAs) in the LSM, whereas the soil pH of 6.4 at site P-I was unfavourable for VFA toxicity to Streptomyces scabiei”
t0“potato tuber disease”
Claim · model-written summary
LSM reduced black scurf severity 51% at P-I in year one.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- LSMe0
- Outcome
- severity of black scurfe0
- Direction
- reducede0
- Value
- 51%e0
- Comparator
- the controle0
- Setting
- P-Ie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“The severity of black scurf was significantly reduced compared with the control at both sites by LSM (51% at P-I and 48% at P-II) and NS (40% at P-I and 61% at P-II) but in the first year only”
Claim · model-written summary
LSM reduced black scurf severity 48% at P-II in year one.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- LSMe0
- Outcome
- severity of black scurfe0
- Direction
- reducede0
- Value
- 48%e0
- Comparator
- the controle0
- Setting
- P-IIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“The severity of black scurf was significantly reduced compared with the control at both sites by LSM (51% at P-I and 48% at P-II) and NS (40% at P-I and 61% at P-II) but in the first year only”
Claim · model-written summary
NS reduced black scurf severity 40% at P-I in year one.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- NSe0
- Outcome
- severity of black scurfe0
- Direction
- reducede0
- Value
- 40%e0
- Comparator
- the controle0
- Setting
- P-Ie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“The severity of black scurf was significantly reduced compared with the control at both sites by LSM (51% at P-I and 48% at P-II) and NS (40% at P-I and 61% at P-II) but in the first year only”
Claim · model-written summary
NS reduced black scurf severity 61% at P-II in year one.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- NSe0
- Outcome
- severity of black scurfe0
- Direction
- reducede0
- Value
- 61%e0
- Comparator
- the controle0
- Setting
- P-IIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“The severity of black scurf was significantly reduced compared with the control at both sites by LSM (51% at P-I and 48% at P-II) and NS (40% at P-I and 61% at P-II) but in the first year only”
Claim · model-written summary
Amendments had no significant effect on silver scurf severity in any year.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- any amendmente0
- Outcome
- severity of silver scurfe0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“There was no significant effect on the severity of silver scurf or fusarium dry rot or tuber yield by any amendment in any year”
Claim · model-written summary
Amendments had no significant effect on fusarium dry rot severity in any year.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- any amendmente0
- Outcome
- fusarium dry rote0
- Direction
- no significant effecte0
FusariumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“There was no significant effect on the severity of silver scurf or fusarium dry rot or tuber yield by any amendment in any year”
Claim · model-written summary
Amendments had no significant effect on tuber yield in any year.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- any amendmente0
- Outcome
- tuber yielde0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“There was no significant effect on the severity of silver scurf or fusarium dry rot or tuber yield by any amendment in any year”
Claim · model-written summary
ALS reduced verticillium wilt 88% at P-I in year two.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ALSe0
- Outcome
- Verticillium wilte0
- Direction
- reducede0
- Value
- 88%e0
- Comparator
- the controle0
- Setting
- P-Ie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“Verticillium wilt was significantly reduced compared with the control by ALS (88%) and NS (66%) at only one site (P-I) and only in the second year”
Claim · model-written summary
NS reduced verticillium wilt 66% at P-I in year two.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- NSe0
- Outcome
- Verticillium wilte0
- Direction
- reducede0
- Value
- 66%e0
- Comparator
- the controle0
- Setting
- P-Ie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“Verticillium wilt was significantly reduced compared with the control by ALS (88%) and NS (66%) at only one site (P-I) and only in the second year”
Claim · model-written summary
NS increased marketable yield at both sites.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- NSe0
- Outcome
- Marketable yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“Marketable yield was increased at both sites for NS and ALS, and at one site for LSM”
Claim · model-written summary
ALS increased marketable yield at both sites.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ALSe0
- Outcome
- Marketable yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“Marketable yield was increased at both sites for NS and ALS, and at one site for LSM”
Claim · model-written summary
LSM increased marketable yield at one site.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- LSMe0
- Outcome
- Marketable yielde0
- Direction
- increasede0
- Qualifier
- one sitee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber disease”
e0“Marketable yield was increased at both sites for NS and ALS, and at one site for LSM”
The same questions in other papers
other · yield · Solanum tuberosum (potato)Results differ
4 papers in the same direction as this paper · 73 in the opposite direction
- positive
- positive
- positive
74 papers more in this group
See all 78 papers →other · Fusarium · Solanum tuberosum (potato)Positive and negative results
1 in the opposite direction
- positive
other · disease · Solanum tuberosum (potato)Positive and negative results
1 paper in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
6 papers more in this group
See all 10 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.