Abstract
ABSTRACT Late blight of potatoes, caused by Phytophthora infestans, is particularly difficult to prevent or control in organic agriculture. In this study, the host resistance of selected varieties to foliar and tuber blight and their yield under organic growing conditions were assessed in trials carried out in four countries (Switzerland, France, England and Norway) in 2001 and 2002. The objective was to identify new, more resistant varieties, which might replace some of the more susceptible varieties which are currently grown in organic agriculture. In each country, five test varieties were compared with two reference varieties, identical for all sites, and with two locally popular varieties. In addition, the effect of copper fungicides was assessed for all varieties in England. Several new potato varieties (Appell, Derby, Innovator and Naturella in Switzerland; Derby, Eden, Escort and Naturella in France; Sarpo Axona, Eve Balfour, Lady Balfour, Sarpo Mira and Sarpo Tominia in England; N89-1756 and N92-15138 in Norway) proved for less susceptible to foliar and tuber blight than most of the varieties currently grown. However, market requirement could restrict their introduction in to practice. The copper fungicide treatment reduced foliar blight severity in all varieties tested in England and in both years, by 27% on average, and increased yield by 20% on average, but did not affect tuber blight. In organic farming, a shift towards the use of blight resistant varieties should thus be strongly encouraged, although this is unlikely to eliminate the need to use copper fungicides.
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Claims 5
Claim · model-written summary
The listed new potato varieties were less susceptible to foliar and tuber blight than most currently grown varieties.
- Taxon
- potato
Solanum tuberosume0 - Material
- Appell, Derby, Innovator and Naturellae0
- Interactor
- Phytophthora infestans
Phytophthora infestanse1pathogen - Outcome
- foliar and tuber blighte0
- Direction
- less susceptiblee0
- Comparator
- most of the varieties currently growne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Several new potato varieties (Appell, Derby, Innovator and Naturella in Switzerland; Derby, Eden, Escort and Naturella in France; Sarpo Axona, Eve Balfour, Lady Balfour, Sarpo Mira and Sarpo Tominia in England; N89-1756 and N92-15138 in Norway) proved for less susceptible to foliar and tuber blight than most of the varieties currently grown”
e1“Late blight of potatoes, caused by Phytophthora infestans”
t0“potato varieties and Copper Based Fungicides”
Claim · model-written summary
Copper fungicide treatment reduced foliar blight severity by 27% on average.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- copper fungicide treatmente0
- Interactor
- Phytophthora infestansPhytophthora infestanse1pathogen
- Outcome
- foliar blight severitye0
- Direction
- reducede0
- Value
- 27%e0
- Setting
- Englande0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The copper fungicide treatment reduced foliar blight severity in all varieties tested in England and in both years, by 27% on average”
e1“Late blight of potatoes, caused by Phytophthora infestans”
t0“potato varieties and Copper Based Fungicides”
Claim · model-written summary
Copper fungicide treatment increased yield by 20% on average.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- copper fungicide treatmente0
- Interactor
- Phytophthora infestansPhytophthora infestanse1pathogen
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 20%e0
- Setting
- Englande0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The copper fungicide treatment reduced foliar blight severity in all varieties tested in England and in both years, by 27% on average, and increased yield by 20% on average”
e1“Late blight of potatoes, caused by Phytophthora infestans”
t0“potato varieties and Copper Based Fungicides”
Claim · model-written summary
Copper fungicide treatment did not affect tuber blight.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Copper Based Fungicidest0
- Interactor
- Phytophthora infestansPhytophthora infestanse1pathogen
- Outcome
- tuber blighte0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but did not affect tuber blight”
e1“Late blight of potatoes, caused by Phytophthora infestans”
t0“potato varieties and Copper Based Fungicides”
Claim · model-written summary
The authors strongly encouraged use of blight resistant varieties in organic farming.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- a shift towards the use of blight resistant varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In organic farming, a shift towards the use of blight resistant varieties should thus be strongly encouraged”
t0“potato varieties and Copper Based Fungicides”
The same questions in other papers
copper atom · Phytophthora infestans · Solanum tuberosum (potato)Positive and negative results
3 papers in the same direction as this paper · 1 reporting no difference from an alternative
- positive
- no effect
- positive
1 paper more in this group
See all 5 papers →fungicide · Phytophthora infestans · Solanum tuberosum (potato)Positive and negative results
31 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- no effect
36 papers more in this group
See all 40 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.