Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2024 Dec 5;19(12):e0310868.
doi: 10.1371/journal.pone.0310868. eCollection 2024.

Integrating weather indices with field performance of novel fungicides for management of late blight of potato (Phytophthora infestans) in North Eastern Himalayan Region of India

Utpal Dey  1 , Shatabhisa Sarkar  1 , Mukesh Sehgal  2 , D P Awasthi  3 , Biman De  3 , Pranab Dutta  4 , Saikat Majumdar  5 , Prasenjit Pal  6 , Subhash Chander  2 , Ph Ranjit Sharma  7 , A K Mohanty  8
Affiliations

Integrating weather indices with field performance of novel fungicides for management of late blight of potato (Phytophthora infestans) in North Eastern Himalayan Region of India

Utpal Dey et al. PLoS One. .

Abstract

The hemibiotrophic fungus-like oomycete phytopathogen, Phytophthora infestans (Mont.) de Bary, causing late blight disease of potato, is one of the most serious foliar diseases of potato. The pathogen spread very rapidly and can infect at any stage of crop growth.The field experiments were carried out during winter (rabi) season of 2020-21 and winter (rabi) season of 2021-22 to find out the correlation between the disease progress and environmental factors and the effective novel fungicides registered under Central Insecticide Board and Registration Committee (CIB&RC) against P. infestans. Results revealed that T7: Mandipropamid 23.4% SC @ 0.1% (1.0 ml/L) at 35 & 55 days after sowing (DAS) and Ametoctradin 27% + Dimethomorph 20.27% SC @ 0.1% (1.0 ml/L) at 45 & 65 DAS recorded least average per cent late blight disease incidence (PLBDI) of 13.00 and 9.33, per cent late blight disease severity/index (PLBDS) of 8.81 and 5.96 and maximum tuber yield of 21.58 and 21.86 t/ha with highest benefit cost ratio (BCR) value of 1:1.95 and 1: 1.99 as compared to control during winter (rabi) season of 2020-21 and winter (rabi) season of 2021-22, respectively. T7 exhibited minimum Area under the Disease Progress Curve (AUDPC) value during both the consecutive seasons. The disease is positively correlated with maximum and minimum temperature, morning and evening relative humidity and sunshine hours. Linearity assumption scatter matrix indicates coefficient of determination of 0.916 was calculated using the pooled data.The relative potato tuber yield loss ranged from 7.38 to 19.96% and 7.14 to 19.62% during 2020-21 and 2021-22, respectively. Spray schedule with contact fungicide followed by systemic/translaminar + contact fungicide recorded reduced potato late blight disease with highest BCR value under natural epiphytotic condition.

PubMed Disclaimer

Conflict of interest statement

The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1. Meteorological parameters during winter (rabi) season of 2020–21.
Fig 2
Fig 2. Meteorological parameters during winter (rabi) season of 2021–22.
Fig 3
Fig 3
Fig 4
Fig 4
Fig 5
Fig 5
Fig 6
Fig 6
Fig 7
Fig 7. Effect of weather parameters on PLBDS (Pooled data of 2020–21 and 2021–22).
*Error bar represent standard error of the mean.
Fig 8
Fig 8. Linearity assumption scatter matric with normal distribution diagonally of control plot.
Fig 9
Fig 9. Linearity assumption scatter matrix with normal distribution diagonally of treatment plot (T7).
Fig 10
Fig 10. Effect of weather parameters on AUDPC (Pooled data of 2020–21 and 2021–22).
Fig 11
Fig 11. Effect of fungicides on PLBDI (Pooled data of 2020–21 and 2021–22).
*Error bar represent Standrad Error.
Fig 12
Fig 12. Effect of fungicides on PLBDS (Pooled data of 2020–21 and 2021–22).
*Error bar represent Standrad Error.
Fig 13
Fig 13. AUDPC values of fungicide variants (Pooled data of 2020–21 and 2021–22).
*Error bar represent standard error of the mean.
See this image and copyright information in PMC

Similar articles

See all similar articles

References

    1. Das R. and Jha K.K. (2022). Information sources utilization among potato farmers in north east India. Indian Res. J. Ext. Edu. 22 (1):44–49.
    1. Thapa S. and Thapa S. (2019). Scope of Value- addition in Potato. International journal of Horticulture, Agriculture and Food Science. 3(3):132–146.
    1. Doboch M. Gedebo A. Haile A. and Beshir H. M. (2022). Improving potato productivity through optimum agronomic management to ensure food security of smallholder farmers. Cogent Food & Agriculture, 8:1–13, doi: 10.1080/23311932.2022.2131995 - DOI
    1. Robertson T. M. Alzaabi A. Z. Robertson M. D. and Fielding B. A. (2018). Starchy carbohydrates in a healthy diet: the role of the humble potato. Nutrients. 10(11):1764. doi: 10.3390/nu10111764 - DOI - PMC - PubMed
    1. FAO (2019). FAOSTAT, FAO Statistical Databases.

MeSH terms

Substances

LinkOut - more resources