Abstract
ABSTRACT A field study at three highland sites near Quito, Ecuador, was conducted to determine whether host-diversity effects on potato late blight would be as important as recently found in studies conducted in temperate areas. We compared three potato mixtures and use of mixtures in combination with different planting densities and two fungicide regimes. Treatment comparisons were made by absolute and relative measures of host-diversity effects and incorporating a truncated area under the disease progress curve as a means of standardizing comparisons across sites. Potato-faba intercrops consisting of only 10% potato provided an estimate of the effects of dilution of susceptible host tissue. Host-diversity effects were very different across study sites, with a large host-diversity effect for reduced disease only at the site most distant from commercial potato production. Planting density had little influence on host-diversity effects or on late blight in single-genotype stands. Fungicide use in combination with potato mixtures enhanced a host-diversity effect for reduced late blight. Potato-faba intercrops produced only a small decrease in potato late blight. Effects of host diversity on yield were variable, with the greatest increase in yield for mixtures treated with fungicides at the site most distant from commercial potato production. The effects of host diversity on late blight severity may be less consistent in the tropical highlands than in the temperate zone, but can contribute to integrated disease management.
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Claims 8
Claim · model-written summary
A large host-diversity effect for reduced late blight occurred only at the site most distant from commercial potato production.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- host-diversitye1
- Outcome
- diseasee1
- Direction
- reducede1
- Setting
- site most distant from commercial potato productione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study at three highland sites near Quito, Ecuador, was conducted to determine whether host-diversity effects on potato late blight would be as important as recently found in studies conducted in temperate areas”
e1“Host-diversity effects were very different across study sites, with a large host-diversity effect for reduced disease only at the site most distant from commercial potato production”
Claim · model-written summary
Planting density had little influence on host-diversity effects or on late blight in single-genotype stands.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- Planting densitye2
- Outcome
- late blighte2
- Direction
- little influencee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study at three highland sites near Quito, Ecuador, was conducted to determine whether host-diversity effects on potato late blight would be as important as recently found in studies conducted in temperate areas”
e2“Planting density had little influence on host-diversity effects or on late blight in single-genotype stands”
Claim · model-written summary
Fungicide use combined with potato mixtures enhanced a host-diversity effect for reduced late blight.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- Fungicide use in combination with potato mixturese3
- Outcome
- host-diversity effect for reduced late blighte3
- Direction
- enhancede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study at three highland sites near Quito, Ecuador, was conducted to determine whether host-diversity effects on potato late blight would be as important as recently found in studies conducted in temperate areas”
e3“Fungicide use in combination with potato mixtures enhanced a host-diversity effect for reduced late blight”
Claim · model-written summary
Potato-faba intercrops produced only a small decrease in potato late blight.
- Taxon
- potatoSolanum tuberosume4
- Treatment
- Potato-faba intercropse4
- Outcome
- potato late blighte4
- Direction
- decreasee4
- Qualifier
- only a smalle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Potato-faba intercrops produced only a small decrease in potato late blight”
Claim · model-written summary
The greatest yield increase from host diversity occurred in fungicide-treated mixtures at the site most distant from commercial potato production.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- mixtures treated with fungicidese5
- Outcome
- yielde5
- Direction
- greatest increasee5
- Setting
- site most distant from commercial potato productione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study at three highland sites near Quito, Ecuador, was conducted to determine whether host-diversity effects on potato late blight would be as important as recently found in studies conducted in temperate areas”
e5“with the greatest increase in yield for mixtures treated with fungicides at the site most distant from commercial potato production”
Claim · model-written summary
Effects of host diversity on yield were variable.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- host diversitye6
- Outcome
- yielde6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study at three highland sites near Quito, Ecuador, was conducted to determine whether host-diversity effects on potato late blight would be as important as recently found in studies conducted in temperate areas”
e6“Effects of host diversity on yield were variable”
Claim · model-written summary
Host-diversity effects on late blight severity may be less consistent in the tropical highlands than in the temperate zone.
Verbatim
e7“The effects of host diversity on late blight severity may be less consistent in the tropical highlands than in the temperate zone”
Claim · model-written summary
Host diversity can contribute to integrated disease management of potato late blight.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- integrated disease managemente7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study at three highland sites near Quito, Ecuador, was conducted to determine whether host-diversity effects on potato late blight would be as important as recently found in studies conducted in temperate areas”
e7“but can contribute to integrated disease management”