Abstract
A field trial was established in 1994 in Prince Edward Island, Canada, to determine the effects of 2- and 3-year crop rotations, with either conventional or minimum tillage treatments, on the severity of potato diseases caused by soil-borne pathogens. The 2-yr rotation consisted of spring barley and potato (cv. Russet Burbank) and the 3-yr rotation was barley (undersown with red clover), red clover and potato. In the potato years only, the main plots were split to examine conventional and minimum tillage (sub-plot) treatments. Potato diseases were assessed during the period 2000–2002, 6–8 yr after the initial establishment of the field trial. In each year of the study, potato plants grown in 3-yr rotations developed significantly (P = 0.05) lower levels of stem and stolon canker and black scurf (Rhizoctonia solani) compared with those from 2-yr rotations. Overall, rotation duration (not tillage type) was the main factor contributing to reduction of disease caused by R. solani. The severity of silver scurf (Helminthosporium solani) was significantly (P = 0.05) lower in tubers from plots managed in 3-yr rotations under minimum tillage practices in 2000, significantly higher in plots managed with minimum tillage in 2001, and unaffected by treatment in 2002. The severity of dry rot (Fusarium spp.) was significantly (P = 0.05) lower in tubers from plots managed with 3-yr rotations under minimum tillage practices in 2000, but was unaffected by either tillage regime in 2001 and 2002. The severity of common scab (Strep tomyces scabiei) was low and not influenced by tillage or rotation in any year of study. In summary, a 3-yr crop rotation combined with minimum tillage reduced potato diseases caused by R. solani and did not affect disease caused by other soil-borne pathogens. From a crop health perspective, there appear to be no constraints to the use of minimum tillage practices in association with 3-yr rotations in potato production in regions of temperate humid agriculture. Key words: Crop rotation, minimum tillage, potato, Solanum tuberosum, soil-borne pathogens, Rhizoctonia solani
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Claims 9
Claim · model-written summary
Three-year rotation reduced stem and stolon canker and black scurf relative to two-year rotation.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- 3-yr rotationse0
- Interactor
- Rhizoctonia solani
Rhizoctonia solanie0pathogen - Outcome
- stem and stolon canker and black scurfe0
- Direction
- lowere0
- Comparator
- 2-yr rotationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato plants grown in 3-yr rotations developed significantly (P = 0.05) lower levels of stem and stolon canker and black scurf (Rhizoctonia solani) compared with those from 2-yr rotations”
Claim · model-written summary
Rotation length was the main factor reducing Rhizoctonia disease.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- rotation duratione0
- Interactor
- R. solaniRhizoctonia solanie0pathogen
- Outcome
- disease caused by R. solanie0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rotation duration (not tillage type) was the main factor contributing to reduction of disease caused by R. solani”
t0“Potato”
Claim · model-written summary
Silver scurf was lower under three-year rotation with minimum tillage in 2000.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 3-yr rotations under minimum tillage practicese0
- Interactor
- Helminthosporium solani
.jpg?width=60)
Helminthosporium solanie0pathogen - Outcome
- severity of silver scurfe0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“severity of silver scurf (Helminthosporium solani) was significantly (P = 0.05) lower in tubers from plots managed in 3-yr rotations under minimum tillage practices in 2000”
t0“Potato”
Claim · model-written summary
Silver scurf was higher with minimum tillage in 2001.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- minimum tillagee0
- Outcome
- silver scurfe2
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significantly higher in plots managed with minimum tillage in 2001”
t0“Potato”
e2“severity of silver scurf (Helminthosporium solani)”
Claim · model-written summary
Silver scurf was unaffected by treatment in 2002.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- treatmente0
- Outcome
- silver scurfe2
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“unaffected by treatment in 2002”
t0“Potato”
e2“severity of silver scurf (Helminthosporium solani)”
Claim · model-written summary
Dry rot was lower with three-year rotation and minimum tillage in 2000.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 3-yr rotations under minimum tillage practicese0
- Outcome
- severity of dry rote0
- Direction
- lowere0
FusariumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“severity of dry rot (Fusarium spp.) was significantly (P = 0.05) lower in tubers from plots managed with 3-yr rotations under minimum tillage practices in 2000”
t0“Potato”
Claim · model-written summary
Dry rot was unaffected by tillage in 2001 and 2002.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- tillage regimee0
- Outcome
- dry rote2
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“unaffected by either tillage regime in 2001 and 2002”
t0“Potato”
e2“severity of dry rot (Fusarium spp.)”
Claim · model-written summary
Common scab was low and unaffected by tillage or rotation.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- tillage or rotatione0
- Interactor
- Strep tomyces scabieie0pathogen
- Outcome
- severity of common scabe0
- Direction
- not influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“severity of common scab (Strep tomyces scabiei) was low and not influenced by tillage or rotation in any year of study”
t0“Potato”
Claim · model-written summary
Authors found no crop-health constraint to minimum tillage with three-year rotations.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- use of minimum tillage practices in association with 3-yr rotationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there appear to be no constraints to the use of minimum tillage practices in association with 3-yr rotations in potato production in regions of temperate humid agriculture”
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