Abstract
Abstract Potato ( Solanum tuberosum L.) production is hindered by several diseases, the worst being the late blight disease caused by Phytophthora infestans (Mont) de Bary. This study aimed at determining an appropriate frequency of ametoctradin + dimethomorph ([26.9 + 20.2]%) spray for late blight disease management in potato genotypes. Field experiments were conducted in Bansoa, Cameroon, from August to October in 2019 and 2020 growing seasons The experimental design was a split‐plot design with three replications. Three ametoctradin + dimethomorph spray frequencies (4‐, 7‐, and 10‐day intervals) were tested at the plot level, whereas seven genotypes including Banso, CIPIRA, Desiree, Dosa, Jacob2005, Manate, and Tezelfo were tested at the subplot level. The commonly used fungicide combination, which includes Mancozeb 80% wettable powder supplemented with cymoxanil + chlorotalomil [(30 + 6)%] wettable powder, was sprayed at 3‐day intervals (a total of 18 sprays) and was used as a positive control. Negative control plots were not sprayed. Data were collected on late blight rAUDPC (relative area under the disease progress curve) and yield components. Results showed all fungicide spray frequencies reduced rAUDPC and consequently increased potato yield. The most economically efficient spray frequency was the 7‐day interval with a total of nine sprays, which resulted in an increased net return of $9738 ha −1 with 9.6% profitability against the commonly used fungicide mix. The total number of fungicide sprays could be reduced to six for genotypes Banso and CIPIRA, which showed lower rAUDPC. The mean yield loss associated with unsprayed plots was 93.2%.
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Claims 6
Claim · model-written summary
Each fungicide spray frequency reduced late blight rAUDPC.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- fungicide spray frequenciese0
- Outcome
- rAUDPCe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all fungicide spray frequencies reduced rAUDPC”
t0“potato genotypes”
Claim · model-written summary
Each spray frequency increased potato yield.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- fungicide spray frequenciese0
- Outcome
- potato yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all fungicide spray frequencies reduced rAUDPC and consequently increased potato yield”
Claim · model-written summary
Seven-day spraying produced an increased net return of $9738 ha −1 versus the common fungicide mix.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 7‐day intervale0
- Outcome
- net returne0
- Direction
- increasede0
- Value
- $9738 ha −1e0
- Comparator
- commonly used fungicide mixe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most economically efficient spray frequency was the 7‐day interval with a total of nine sprays, which resulted in an increased net return of $9738 ha −1 with 9.6% profitability against the commonly used fungicide mix”
t0“potato genotypes”
Claim · model-written summary
Seven-day spraying had 9.6% profitability versus the common mix.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 7‐day intervale0
- Outcome
- profitabilitye0
- Direction
- increasede0
- Value
- 9.6%e0
- Comparator
- commonly used fungicide mixe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most economically efficient spray frequency was the 7‐day interval with a total of nine sprays, which resulted in an increased net return of $9738 ha −1 with 9.6% profitability against the commonly used fungicide mix”
t0“potato genotypes”
Claim · model-written summary
Sprays could be reduced to six for Banso and CIPIRA, which had lower rAUDPC.
- Taxon
- potatoSolanum tuberosumt0
- Material
- Banso and CIPIRAe0
- Outcome
- total number of fungicide sprays could be reduced to sixe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total number of fungicide sprays could be reduced to six for genotypes Banso and CIPIRA, which showed lower rAUDPC”
t0“potato genotypes”
Claim · model-written summary
Unsprayed plots had mean yield loss of 93.2%.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- unsprayed plotse0
- Outcome
- mean yield losse0
- Value
- 93.2%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mean yield loss associated with unsprayed plots was 93.2%”
t0“potato genotypes”
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See all 191 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.