Abstract
Phytophthora infestans (Mont.) de Bary, belongs to order Peronosporales is one of the most destructive phytopathogen causing late blight disease of potato (Solanum tuberosum L.). The disease symptoms appear on leaf, petiole, stem, and tubers at any stage of crop growth and may cause severe disease epidemics leading to complete defoliation and extensive yield loss. The field experiments were conducted during 2020–21 and 2021–22 at Chesrimai GP, Charilam block, Sepahijala, Tripura to find out the effective management strategies with fungicides to mitigate the losses caused by the devastating disease. The experiment was laid out in a randomized block design (RBD) in 3 replications with 8 treatments having different fungicides in different combinations for determining the best spray schedule against late bight disease. Results revealed that one spraying of Mancozeb 75% @0.25% at 35 days after sowing (DAS), second spraying of Cymoxanil 8% + Mancozeb 64% @0.25% at 42 DAS, and third spraying of Mancozeb 75% @0.25% at 49 DAS and fourth spraying of Cymoxanil 8% + Mancozeb 64% @ 0.25% at 56 DAS recorded the best performing treatment, with the least mean disease severity (10.54 and 7.30%), the least mean disease incidence (15.00 and 12.75%), the least coefficient of disease index (CODEX) value (1.58% and 0.93%), and highest tuber yield (21.27 and 21.68 t/ha) during 2020–21 and 2021–22, respectively. In addition, there were 26.6 and 27.7% increase in yield over control during 2020–21 and 2021–22, respectively and the pooled incremental cost benefit ratio (ICBR) of 1:16.09 was found to be highest among all other treatments. Efficient spray schedule of prophylactic/ preventive spray with contact fungicide followed by spraying with translaminar/systemic + contact fungicide can effectively manage the late blight disease of potato under field conditions.
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Claims 7
Claim · model-written summary
The four spray schedule gave the least disease severity, 10.54 and 7.30% in the two years.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- one spraying of Mancozeb 75% @0.25% at 35 days after sowing (DAS), second spraying of Cymoxanil 8% + Mancozeb 64% @0.25% at 42 DAS, and third spraying of Mancozeb 75% @0.25% at 49 DAS and fourth spraying of Cymoxanil 8% + Mancozeb 64% @ 0.25% at 56 DASe1
- Interactor
- Phytophthora infestans
Phytophthora infestanst0pathogen - Outcome
- mean disease severitye0
- Direction
- leaste0
- Value
- 10.54 and 7.30%e0
- Comparator
- all other treatmentse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“recorded the best performing treatment, with the least mean disease severity (10.54 and 7.30%)”
t0“late blight (Phytophthora infestans) of potato”
e1“one spraying of Mancozeb 75% @0.25% at 35 days after sowing (DAS), second spraying of Cymoxanil 8% + Mancozeb 64% @0.25% at 42 DAS, and third spraying of Mancozeb 75% @0.25% at 49 DAS and fourth spraying of Cymoxanil 8% + Mancozeb 64% @ 0.25% at 56 DAS”
e2“all other treatments”
Claim · model-written summary
The schedule gave the least disease incidence, 15.00 and 12.75%.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- one spraying of Mancozeb 75% @0.25% at 35 days after sowing (DAS), second spraying of Cymoxanil 8% + Mancozeb 64% @0.25% at 42 DAS, and third spraying of Mancozeb 75% @0.25% at 49 DAS and fourth spraying of Cymoxanil 8% + Mancozeb 64% @ 0.25% at 56 DASe1
- Interactor
- Phytophthora infestansPhytophthora infestanst0pathogen
- Outcome
- mean disease incidencee0
- Direction
- leaste0
- Value
- 15.00 and 12.75%e0
- Comparator
- all other treatmentse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the least mean disease incidence (15.00 and 12.75%)”
t0“late blight (Phytophthora infestans) of potato”
e1“one spraying of Mancozeb 75% @0.25% at 35 days after sowing (DAS), second spraying of Cymoxanil 8% + Mancozeb 64% @0.25% at 42 DAS, and third spraying of Mancozeb 75% @0.25% at 49 DAS and fourth spraying of Cymoxanil 8% + Mancozeb 64% @ 0.25% at 56 DAS”
e2“all other treatments”
Claim · model-written summary
The schedule gave the least disease index, 1.58% and 0.93%.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- one spraying of Mancozeb 75% @0.25% at 35 days after sowing (DAS), second spraying of Cymoxanil 8% + Mancozeb 64% @0.25% at 42 DAS, and third spraying of Mancozeb 75% @0.25% at 49 DAS and fourth spraying of Cymoxanil 8% + Mancozeb 64% @ 0.25% at 56 DASe1
- Interactor
- Phytophthora infestansPhytophthora infestanst0pathogen
- Outcome
- coefficient of disease index (CODEX)e0
- Direction
- leaste0
- Value
- 1.58% and 0.93%e0
- Comparator
- all other treatmentse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the least coefficient of disease index (CODEX) value (1.58% and 0.93%)”
t0“late blight (Phytophthora infestans) of potato”
e1“one spraying of Mancozeb 75% @0.25% at 35 days after sowing (DAS), second spraying of Cymoxanil 8% + Mancozeb 64% @0.25% at 42 DAS, and third spraying of Mancozeb 75% @0.25% at 49 DAS and fourth spraying of Cymoxanil 8% + Mancozeb 64% @ 0.25% at 56 DAS”
e2“all other treatments”
Claim · model-written summary
The schedule produced the highest tuber yield, 21.27 and 21.68 t/ha.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- one spraying of Mancozeb 75% @0.25% at 35 days after sowing (DAS), second spraying of Cymoxanil 8% + Mancozeb 64% @0.25% at 42 DAS, and third spraying of Mancozeb 75% @0.25% at 49 DAS and fourth spraying of Cymoxanil 8% + Mancozeb 64% @ 0.25% at 56 DASe1
- Outcome
- tuber yielde0
- Direction
- higheste0
- Value
- 21.27 and 21.68 t/hae0
- Comparator
- all other treatmentse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest tuber yield (21.27 and 21.68 t/ha)”
t0“late blight (Phytophthora infestans) of potato”
e1“one spraying of Mancozeb 75% @0.25% at 35 days after sowing (DAS), second spraying of Cymoxanil 8% + Mancozeb 64% @0.25% at 42 DAS, and third spraying of Mancozeb 75% @0.25% at 49 DAS and fourth spraying of Cymoxanil 8% + Mancozeb 64% @ 0.25% at 56 DAS”
e2“all other treatments”
Claim · model-written summary
Yield increased 26.6 and 27.7% over control in the respective years.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- one spraying of Mancozeb 75% @0.25% at 35 days after sowing (DAS), second spraying of Cymoxanil 8% + Mancozeb 64% @0.25% at 42 DAS, and third spraying of Mancozeb 75% @0.25% at 49 DAS and fourth spraying of Cymoxanil 8% + Mancozeb 64% @ 0.25% at 56 DASe1
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 26.6 and 27.7%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were 26.6 and 27.7% increase in yield over control during 2020–21 and 2021–22, respectively”
t0“late blight (Phytophthora infestans) of potato”
e1“one spraying of Mancozeb 75% @0.25% at 35 days after sowing (DAS), second spraying of Cymoxanil 8% + Mancozeb 64% @0.25% at 42 DAS, and third spraying of Mancozeb 75% @0.25% at 49 DAS and fourth spraying of Cymoxanil 8% + Mancozeb 64% @ 0.25% at 56 DAS”
Claim · model-written summary
The pooled incremental cost benefit ratio was highest at 1:16.09.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- pooled incremental cost benefit ratio (ICBR)e0
- Direction
- higheste0
- Value
- 1:16.09e0
- Comparator
- all other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the pooled incremental cost benefit ratio (ICBR) of 1:16.09 was found to be highest among all other treatments”
t0“late blight (Phytophthora infestans) of potato”
Claim · model-written summary
The authors recommend preventive contact fungicide followed by translaminar or systemic plus contact fungicide for field late blight management.
- Taxon
- potatoSolanum tuberosume0
- Interactor
- Phytophthora infestansPhytophthora infestanst0pathogen
- Outcome
- prophylactic/ preventive spray with contact fungicide followed by spraying with translaminar/systemic + contact fungicidee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Efficient spray schedule of prophylactic/ preventive spray with contact fungicide followed by spraying with translaminar/systemic + contact fungicide can effectively manage the late blight disease of potato under field conditions.”
t0“late blight (Phytophthora infestans) of potato”
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