Abstract
Verticillium dahliae Kleb. is a soilborne fungal pathogen of many crops. In potato, it is the major causal agent of Early Dying. In Manitoba, potato fields planted with cv. Russet Burbank are infested with highly pathogenic V. dahliae isolates, which can produce up to 90 % disease severity. The objective of the study was to evaluate selected compost, green manure, and seed-meal treatments, in comparison with the soil fumigant Vapam, for their ability to reduce propagule density of V. dahliae in soil and decrease disease, and to enhance potato yield. Select green manure crops (oriental and white mustard, Canada milk vetch, sorghum-sudangrass, rye, alfalfa, oat/pea mixture), organic amendments (composted cattle manure and mustard seed-meal), and Vapam, and crop sequences that contribute to the suppression of Verticillium, or the improvement of potato yield were used in a 3-year field study initiated in 2006. Survival in soil of microsclerotia was evaluated as a measure of treatments’ success in potentially reducing Early Dying. Compost and seed-meal treatments, compared to an untreated control, reduced incidence to 30 and 40 %, respectively, but only seed-meal reduced V. dahliae propagule density. Overall, green manures over 1 or 2-years were ineffective in reducing propagule density or improving potato yield. Vapam was partially effective in reducing the propagule density only at the beginning of the potato season, but it did not reduce disease incidence compared to the control. Compost and seed-meal are promising as alternative control of V. dahliae. Only compost reduced disease and increased potato yield, which was associated with improved nutrient availability (phosphorus and sulfate) in soil.
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Claims 9
Claim · model-written summary
Compost reduced potato disease incidence to 30% versus untreated control.
- Taxon
- Potato
Solanum tuberosumt0 - Treatment
- Composte0
- Outcome
- incidencee0
- Direction
- reducede0
- Value
- 30e0
- Comparator
- untreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compost and seed-meal treatments, compared to an untreated control, reduced incidence to 30 and 40 %, respectively”
t0“Potato Early Dying”
Claim · model-written summary
Seed-meal reduced potato disease incidence to 40% versus untreated control.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- seed-meal treatmentse0
- Outcome
- incidencee0
- Direction
- reducede0
- Value
- 40 %e0
- Comparator
- untreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compost and seed-meal treatments, compared to an untreated control, reduced incidence to 30 and 40 %, respectively”
t0“Potato Early Dying”
Claim · model-written summary
Only seed-meal reduced V. dahliae soil propagule density among the two amendments.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- seed-meale0
- Interactor
- V. dahliae
Verticillium dahliaee0pathogen - Outcome
- V. dahliae propagule densitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but only seed-meal reduced V. dahliae propagule density”
t0“Potato Early Dying”
Claim · model-written summary
Green manures over one or two years did not reduce propagule density.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- green manures over 1 or 2-yearse0
- Outcome
- propagule densitye0
- Direction
- ineffective in reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“green manures over 1 or 2-years were ineffective in reducing propagule density”
t0“Potato Early Dying”
Claim · model-written summary
Green manures over one or two years did not improve potato yield.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- green manures over 1 or 2-yearse0
- Outcome
- potato yielde0
- Direction
- ineffective ine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“green manures over 1 or 2-years were ineffective in reducing propagule density or improving potato yield”
Claim · model-written summary
Vapam reduced propagule density only at the start of the potato season.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- Vapame0
- Outcome
- propagule densitye0
- Direction
- reducinge0
- Qualifier
- only at the beginning of the potato seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vapam was partially effective in reducing the propagule density only at the beginning of the potato season”
Claim · model-written summary
Vapam did not reduce disease incidence versus control.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Vapame1
- Outcome
- disease incidencee0
- Direction
- did not reducee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it did not reduce disease incidence compared to the control”
e1“Vapam was partially effective”
t0“Potato Early Dying”
Claim · model-written summary
Compost increased potato yield.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- composte0
- Outcome
- potato yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only compost reduced disease and increased potato yield”
Claim · model-written summary
Improved soil phosphorus and sulfate availability was associated with compost benefits.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- composte0
- Compound
- phosphorus and sulfatee0
- Outcome
- potato yielde0
- Direction
- increasede0
- Qualifier
- improved nutrient availabilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only compost reduced disease and increased potato yield, which was associated with improved nutrient availability (phosphorus and sulfate) in soil”
The same questions in other papers
fertilization · disease · Solanum tuberosum (potato)Positive and negative results
32 papers in the same direction as this paper · 14 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- negative
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See all 48 papers →fertilization · yield · Solanum tuberosum (potato)Positive and negative results
393 papers in the same direction as this paper · 48 in the opposite direction · 8 reporting no difference from an alternative
- positive
- positive
- positive
446 papers more in this group
See all 450 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.