Abstract
Abstract Fungicide application is an effective management option to control late blight of potato (caused by Phytophthora infestans ). Field experiments were conducted to evaluate the efficacy of recently introduced and previously used fungicides on late blight management and potato yields in the western plains of Nepal in 2015 and 2016 crop seasons. Fungicides and a non‐treated control (NTC) were replicated three times in a randomized block design planted with late blight susceptible cultivar Cardinal. Chlorothalonil, copper oxychloride, dimethomorph, fenamidone + mancozeb, mancozeb and metalaxyl were sprayed in 2015. In 2016, carbendazim was used instead of chlorothalonil. The area under disease progress curve (AUDPC) was consistently reduced in years by dimethomorph (90% and 65% in 2015 and 2016, respectively), fenamidone + mancozeb (68% and 62%) and mancozeb (40% and 47%) compared with the NTC. Similarly, tuber yield was increased with the application of dimethomorph (266% and 146% in 2015 and 2016, respectively), fenamidone + mancozeb (211% and 155%) and mancozeb (136% and 116%) compared with the NTC. Chlorothalonil reduced AUDPC by 43% and increased tuber yield by 170% in 2015. Other fungicides either had inconsistent results or did not reduce late blight severity and consequent effects on potato yield. The overall benefit–cost ratio was highest for dimethomorph in both years. These results show efficacy of dimethomorph, fenamidone + mancozeb and mancozeb in reducing late blight severity and increasing potato tuber yield in the plains of Nepal.
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Claims 10
Claim · model-written summary
AUDPC of potato late blight was consistently reduced by dimethomorph by 90% in 2015 and 65% in 2016 compared with the non-treated control.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- dimethomorphe0
- Interactor
- Phytophthora infestans
Phytophthora infestanst0pathogen - Outcome
- area under disease progress curve (AUDPC)e0
- Direction
- reducede0
- Value
- 90% and 65%e0
- Comparator
- NTCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The area under disease progress curve (AUDPC) was consistently reduced in years by dimethomorph (90% and 65% in 2015 and 2016, respectively), fenamidone + mancozeb (68% and 62%) and mancozeb (40% and 47%) compared with the NTC”
t0“potato late blight (Phytophthora infestans) in the plains of Nepal”
Claim · model-written summary
AUDPC of potato late blight was consistently reduced by fenamidone + mancozeb by 68% and 62% in the two years compared with the non-treated control.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- fenamidone + mancozebe0
- Interactor
- Phytophthora infestansPhytophthora infestanst0pathogen
- Outcome
- area under disease progress curve (AUDPC)e0
- Direction
- reducede0
- Value
- 68% and 62%e0
- Comparator
- NTCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The area under disease progress curve (AUDPC) was consistently reduced in years by dimethomorph (90% and 65% in 2015 and 2016, respectively), fenamidone + mancozeb (68% and 62%) and mancozeb (40% and 47%) compared with the NTC”
t0“potato late blight (Phytophthora infestans) in the plains of Nepal”
Claim · model-written summary
AUDPC of potato late blight was consistently reduced by mancozeb by 40% and 47% in the two years compared with the non-treated control.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- mancozebe0
- Interactor
- Phytophthora infestansPhytophthora infestanst0pathogen
- Outcome
- area under disease progress curve (AUDPC)e0
- Direction
- reducede0
- Value
- 40% and 47%e0
- Comparator
- NTCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The area under disease progress curve (AUDPC) was consistently reduced in years by dimethomorph (90% and 65% in 2015 and 2016, respectively), fenamidone + mancozeb (68% and 62%) and mancozeb (40% and 47%) compared with the NTC”
t0“potato late blight (Phytophthora infestans) in the plains of Nepal”
Claim · model-written summary
Potato tuber yield was increased with dimethomorph by 266% in 2015 and 146% in 2016 compared with the non-treated control.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- dimethomorphe1
- Interactor
- Phytophthora infestansPhytophthora infestanst0pathogen
- Outcome
- tuber yielde1
- Direction
- increasede1
- Value
- 266% and 146%e1
- Comparator
- NTCe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“tuber yield was increased with the application of dimethomorph (266% and 146% in 2015 and 2016, respectively), fenamidone + mancozeb (211% and 155%) and mancozeb (136% and 116%) compared with the NTC”
t0“potato late blight (Phytophthora infestans) in the plains of Nepal”
Claim · model-written summary
Potato tuber yield was increased with fenamidone + mancozeb by 211% and 155% in the two years compared with the non-treated control.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- fenamidone + mancozebe1
- Interactor
- Phytophthora infestansPhytophthora infestanst0pathogen
- Outcome
- tuber yielde1
- Direction
- increasede1
- Value
- 211% and 155%e1
- Comparator
- NTCe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“tuber yield was increased with the application of dimethomorph (266% and 146% in 2015 and 2016, respectively), fenamidone + mancozeb (211% and 155%) and mancozeb (136% and 116%) compared with the NTC”
t0“potato late blight (Phytophthora infestans) in the plains of Nepal”
Claim · model-written summary
Potato tuber yield was increased with mancozeb by 136% and 116% in the two years compared with the non-treated control.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- mancozebe1
- Interactor
- Phytophthora infestansPhytophthora infestanst0pathogen
- Outcome
- tuber yielde1
- Direction
- increasede1
- Value
- 136% and 116%e1
- Comparator
- NTCe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“tuber yield was increased with the application of dimethomorph (266% and 146% in 2015 and 2016, respectively), fenamidone + mancozeb (211% and 155%) and mancozeb (136% and 116%) compared with the NTC”
t0“potato late blight (Phytophthora infestans) in the plains of Nepal”
Claim · model-written summary
Chlorothalonil reduced AUDPC by 43% in 2015.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Chlorothalonile2
- Interactor
- Phytophthora infestansPhytophthora infestanst0pathogen
- Outcome
- AUDPCe2
- Direction
- reducede2
- Value
- 43%e2
- Qualifier
- in 2015e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Chlorothalonil reduced AUDPC by 43% and increased tuber yield by 170% in 2015”
t0“potato late blight (Phytophthora infestans) in the plains of Nepal”
Claim · model-written summary
Chlorothalonil increased potato tuber yield by 170% in 2015.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Chlorothalonile2
- Interactor
- Phytophthora infestansPhytophthora infestanst0pathogen
- Outcome
- tuber yielde2
- Direction
- increasede2
- Value
- 170%e2
- Qualifier
- in 2015e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Chlorothalonil reduced AUDPC by 43% and increased tuber yield by 170% in 2015”
t0“potato late blight (Phytophthora infestans) in the plains of Nepal”
Claim · model-written summary
The other fungicides either gave inconsistent results or did not reduce late blight severity and the consequent effects on potato yield.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Other fungicidese3
- Interactor
- Phytophthora infestansPhytophthora infestanst0pathogen
- Outcome
- late blight severitye3
- Direction
- did not reducee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Other fungicides either had inconsistent results or did not reduce late blight severity and consequent effects on potato yield”
t0“potato late blight (Phytophthora infestans) in the plains of Nepal”
Claim · model-written summary
The overall benefit-cost ratio was highest for dimethomorph in both years.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- dimethomorphe4
- Interactor
- Phytophthora infestansPhytophthora infestanst0pathogen
- Outcome
- benefit–cost ratioe4
- Direction
- higheste4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The overall benefit–cost ratio was highest for dimethomorph in both years”
t0“potato late blight (Phytophthora infestans) in the plains of Nepal”
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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.