Abstract
The efficacy of metalaxyl-m (Ridomil Gold 480EC) and phosphite (Phostrol) applied at planting in-furrow against pink rot (Phytophthora erythroseptica) of potato (Solanum tuberosum) 'Shepody' and 'Russet Burbank' was evaluated in field trials conducted in 2005 and 2006 in Florenceville, New Brunswick, Canada. Inoculum made from a metalaxyl-m-sensitive isolate of P. erythroseptica from New Brunswick was applied either in-furrow as a vermiculite slurry at planting or as a zoospore drench in soils adjacent to potato plants in late August. After harvest, the number and weight of tubers showing pink rot symptoms were assessed and expressed as percentages of the total tuber number and total weight of tubers. Metalaxyl-m applied in-furrow was significantly more effective against pink rot than phosphite. The mean percentage of diseased tubers as a percentage of total tuber weight was 1.5% (2005) and 1.2% (2006) for metalaxyl-m-treated plots and 9.6% (2005) and 2.8% (2006) for phosphite-treated plots, a percentage similar to that obtained in inoculated control plots with no fungicide treatment. The mean percentage of diseased tubers expressed as a percentage of the total number of tubers was 1.7% (2005) and 1.3% (2006) for metalaxyl-m-treated plots and 10.1% (2005) and 3.1% (2006) for phosphite-treated plots. Disease incidence was significantly higher using the late-season inoculation technique (respective means in 2005 and 2006 were 9.9 and 3.8% diseased tubers, by weight, and 10.6 and 3.9%, by number) than with the in-furrow inoculation method (respective means in 2005 and 2006 were 3.3 and 0.7% by weight, and 3.7 and 1.3%, by number). The potato cv. Shepody was significantly more susceptible to pink rot (9.9 and 3.3% diseased tubers, by weight, in 2005 and 2006, respectively, and 10.6 and 3.9%, by number) than Russet Burbank (respective means in 2005 and 2006 were 3.4,% and 1.2%, by weight, and 3.7,% and 1.2%, by number). Our findings indicate that metalaxyl applied in-furrow at planting is a viable option for control of pink rot caused by metalaxyl-sensitive strains of P. erythroseptica, whereas phosphite was ineffective.
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Claims 8
Claim · model-written summary
In-furrow metalaxyl-m controlled pink rot more effectively than phosphite.
- Taxon
- Potato
Solanum tuberosumt0 - Treatment
- Metalaxyl-m applied in-furrowe0
- Interactor
- Phytophthora erythroseptica
_with_Phytophthora_erythroseptica_zoospores_fmicb-10-00131-g003.jpg?width=60)
Phytophthora erythrosepticat0pathogen - Outcome
- pink rote0
- Direction
- more effectivee0
- Comparator
- phosphitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_with_Phytophthora_erythroseptica_zoospores_fmicb-10-00131-g003.jpg?width=500)
Verbatim
e0“Metalaxyl-m applied in-furrow was significantly more effective against pink rot than phosphite.”
t0“Pink Rot (Phytophthora erythroseptica) of Potato”
Claim · model-written summary
Metalaxyl-m plots had 1.5% and 1.2% diseased tuber weight in 2005 and 2006, versus 9.6% and 2.8% for phosphite.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- metalaxyl-m-treated plotse0
- Interactor
- Phytophthora erythrosepticaPhytophthora erythrosepticat0pathogen
- Outcome
- percentage of diseased tubers as a percentage of total tuber weighte0
- Value
- 1.5% (2005) and 1.2% (2006)e0
- Qualifier
- 9.6% (2005) and 2.8% (2006)e0
- Comparator
- phosphite-treated plotse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mean percentage of diseased tubers as a percentage of total tuber weight was 1.5% (2005) and 1.2% (2006) for metalaxyl-m-treated plots and 9.6% (2005) and 2.8% (2006) for phosphite-treated plots”
t0“Pink Rot (Phytophthora erythroseptica) of Potato”
Claim · model-written summary
Metalaxyl-m plots had 1.7% and 1.3% diseased tubers by number, versus 10.1% and 3.1% for phosphite.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- metalaxyl-m-treated plotse0
- Interactor
- Phytophthora erythrosepticaPhytophthora erythrosepticat0pathogen
- Outcome
- percentage of diseased tubers expressed as a percentage of the total number of tuberse0
- Value
- 1.7% (2005) and 1.3% (2006)e0
- Qualifier
- 10.1% (2005) and 3.1% (2006)e0
- Comparator
- phosphite-treated plotse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mean percentage of diseased tubers expressed as a percentage of the total number of tubers was 1.7% (2005) and 1.3% (2006) for metalaxyl-m-treated plots and 10.1% (2005) and 3.1% (2006) for phosphite-treated plots.”
t0“Pink Rot (Phytophthora erythroseptica) of Potato”
Claim · model-written summary
Late-season inoculation gave higher pink rot incidence by tuber weight than in-furrow inoculation.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- late-season inoculation techniquee0
- Interactor
- Phytophthora erythrosepticaPhytophthora erythrosepticat0pathogen
- Outcome
- diseased tubers, by weighte0
- Direction
- highere0
- Value
- 9.9 and 3.8%e0
- Qualifier
- 3.3 and 0.7%e0
- Comparator
- in-furrow inoculation methode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease incidence was significantly higher using the late-season inoculation technique (respective means in 2005 and 2006 were 9.9 and 3.8% diseased tubers, by weight, and 10.6 and 3.9%, by number) than with the in-furrow inoculation method (respective means in 2005 and 2006 were 3.3 and 0.7% by weight, and 3.7 and 1.3%, by number).”
t0“Pink Rot (Phytophthora erythroseptica) of Potato”
Claim · model-written summary
Late-season inoculation gave higher pink rot incidence by tuber number than in-furrow inoculation.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- late-season inoculation techniquee0
- Interactor
- Phytophthora erythrosepticaPhytophthora erythrosepticat0pathogen
- Outcome
- Disease incidencee0
- Direction
- highere0
- Value
- 10.6 and 3.9%e0
- Qualifier
- 3.7 and 1.3%e0
- Comparator
- in-furrow inoculation methode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease incidence was significantly higher using the late-season inoculation technique (respective means in 2005 and 2006 were 9.9 and 3.8% diseased tubers, by weight, and 10.6 and 3.9%, by number) than with the in-furrow inoculation method (respective means in 2005 and 2006 were 3.3 and 0.7% by weight, and 3.7 and 1.3%, by number).”
t0“Pink Rot (Phytophthora erythroseptica) of Potato”
Claim · model-written summary
Shepody was more susceptible to pink rot than Russet Burbank.
- Taxon
- potatoSolanum tuberosume0
- Material
- Shepodye0
- Interactor
- Phytophthora erythrosepticaPhytophthora erythrosepticat0pathogen
- Outcome
- susceptible to pink rote0
- Direction
- more susceptiblee0
- Comparator
- Russet Burbanke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The potato cv. Shepody was significantly more susceptible to pink rot (9.9 and 3.3% diseased tubers, by weight, in 2005 and 2006, respectively, and 10.6 and 3.9%, by number) than Russet Burbank”
t0“Pink Rot (Phytophthora erythroseptica) of Potato”
Claim · model-written summary
The authors consider in-furrow metalaxyl viable for pink rot caused by sensitive strains.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- metalaxyl applied in-furrow at plantinge0
- Interactor
- P. erythrosepticaPhytophthora erythrosepticae0pathogen
- Outcome
- viable option for control of pink rote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“metalaxyl applied in-furrow at planting is a viable option for control of pink rot caused by metalaxyl-sensitive strains of P. erythroseptica”
t0“of Potato”
Claim · model-written summary
The authors judged phosphite ineffective against pink rot.
- Taxon
- PotatoSolanum tuberosumt0
- Interactor
- Phytophthora erythrosepticaPhytophthora erythrosepticat0pathogen
- Outcome
- phosphite was ineffectivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas phosphite was ineffective.”
t0“Pink Rot (Phytophthora erythroseptica) of Potato”
The same questions in other papers
metalaxyl-M · Phytophthora erythroseptica · Solanum tuberosum (potato)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →inoculation · Phytophthora erythroseptica · Solanum tuberosum (potato)Positive and negative results
1 in the opposite direction
- positive
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.