Severity of potato late blight under different weather conditions in Mymensingh region of Bangladesh

An experiment has been conducted to observed the disease severity of late blight of potato in the different weather parameters viz., air temperature, soil temperature, dew points, percent relative humidity and period of sunshine. The experiment was conducted in the Net-house, Department of Plant Pathology, Bangladesh Agricultural University (BAU), Mymensingh during July 2016 to November 2017. Weather data were collected on daily basis from BAU weather station during the experimental period. A significant role of weather parameters was detected in disease development and disease progress. Temperature was strongly linked with the late blight infection in potato. From 15 December, 2016 to 12 January, 2017 air temperature was ranged from 21.00-23.50°C and soil temperature was ranged from 19.00-22.00°C, and this range late blight incidence was not detected in the potato plant. From 13-14 January air and soil temperature suddenly decreased 2°C and from next day again increased the temperature as well as starting late blight disease symptoms. It was observed that dew point and percent relative humidity have a big role on late blight disease severity of potato. In 13-14 January, 2017 dew point decreased from 14°C to 8°C and Percent RH decreased from 80% to 51%. From 14 January, 2017, disease symptoms were observed in potato leaves and rapidly increased. Thus, late blight of potato disease may respond to the variation of temperature, dew point and relative humidity. Progressive Agriculture 31 (2): 74-80, 2020

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Potato late blight disease prediction using meteorological parameters in Northern Himalayas of India

Journal of Agrometeorology ◽

10.54386/jam.v23i3.35 ◽

2021 ◽

Vol 23 (3) ◽

pp. 310-315

Author(s):

W. A. DAR ◽

F. A. PARRY ◽

B. A. BHAT

Keyword(s):

Wind Speed ◽

Relative Humidity ◽

Late Blight ◽

Weather Conditions ◽

Potato Late Blight ◽

Disease Development ◽

Potato Blight ◽

Late Blight Disease ◽

Weather Parameters ◽

Blight Disease

Weather parameters play an important role in the spread of potato late blight of caused by Phytophthora infestans (Mont.) de Bary has historically been serious disease of potatoes through worldwide, including India. Due to spatial variation in prevailing weather conditions, its severity varies from region to region. Disease development process and the weather parameters are well understood and have been utilized for disease developing forecasting models and decision support system. Therefore, an experiment was conducted for two consecutive cropping seasons (2017 & 2018) to develop a forecasting model against late blight of potato using stepwise regression analysis for Northern Himalayas in India. Maximum and minimum temperature, relative humidity, rainfall and wind speed appeared to be most significant factors in the potato late blight disease development. The meteorological conditions conducive for the development of potato late blight disease were characterized. Maximum and minimum temperatures in the range of 15.0 – 28.0°C and 2.0 – 12.0°C were found favorable for potato blight disease. Similarly, relative humidity, rainfall and wind speed in the range of 85 - 95 per cent, 15.5 - 20.75 mm and 1.0 - 5.5 Km h-1, respectively, were conducive for potato late blight disease which are helpful in disease development.

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Efficacy of fungicides in controlling late blight of potato

Progressive Agriculture ◽

10.3329/pa.v26i2.25963 ◽

2015 ◽

Vol 26 (2) ◽

pp. 103-108

Author(s):

MM Anwar ◽

A Parveen ◽

MM Hossain ◽

NU Mahamud ◽

RK Roy

Keyword(s):

Late Blight ◽

Tuber Yield ◽

Cultural Practices ◽

Disease Incidence ◽

Integrated Approach ◽

Control Treatment ◽

Commercial Potato ◽

Late Blight Disease ◽

Blight Disease ◽

Late Blight Of Potato

Potato cultivars grown in Bangladesh have low levels of general resistance to late blight. As such, most commercial potato farmers rely on fungicide applications for control of Phytophthora infestans, the causal agent of late blight. Management of late blight of potato requires an integrated approach that includes rotation with non-hosts, resistant cultivars, cultural practices, and fungicides. The study on efficacy of some new fungicides against late blight disease of potato was conducted at ARS, Alamnagar Rangpur during rabi season 2010-2011 to select suitable fungicides against late blight of potato. Thirteen different fungicides were tested and all the tested fungicides showed significantly better performance over control. Considering percentage disease incidence T4,T6 and T12 showed better performance than all other treatment. In case of T4,T6 and T12 treatment disease reduction was more than 80 % over control. Significantly the highest tuber yield 25.5 t ha-1was obtained from T3 which was statistically similar to the yield of T2,T5 , T6, T9, T10, T11and T12 treatment whereas the lowest tuber yield 14.5 t ha-1 was obtained from control treatment. Field experiment was conducted from 2010 to 2011 to investigate the comparative efficacy of the fungicides. In the field, applications of fungicide that preceded the largest incremental increase in disease incidence provided the best control of disease or increased yield.Progressive Agriculture 26 (2): 103-108, 2015

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Prediction of Potato Late Blight Disease Based Upon Weather Parameters Using Artificial Neural Network Approach

2018 9th International Conference on Computing, Communication and Networking Technologies (ICCCNT) ◽

10.1109/icccnt.2018.8494024 ◽

2018 ◽

Cited By ~ 1

Author(s):

Priyanka Sharma ◽

B.K. Singh ◽

R.P. Singh

Keyword(s):

Neural Network ◽

Artificial Neural Network ◽

Late Blight ◽

Potato Late Blight ◽

Network Approach ◽

Neural Network Approach ◽

Late Blight Disease ◽

Weather Parameters ◽

Blight Disease ◽

Artificial Neural Network Approach

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Evaluation of bio-agents and neem based products against late blight disease (Phytophthora infestans) of potato

Indian Phytopathology ◽

10.1007/s42360-021-00330-6 ◽

2021 ◽

Vol 74 (1) ◽

pp. 181-187

Author(s):

Mehi Lal ◽

Sorabh Chaudhary ◽

Sanjay Rawal ◽

Sanjeev Sharma ◽

Manoj Kumar ◽

...

Keyword(s):

Late Blight ◽

Phytophthora Infestans ◽

Late Blight Disease ◽

Blight Disease

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Two new defensive constituents from potato tubers (Solanum tuberosum)

Zeitschrift für Naturforschung B ◽

10.1515/znb-2016-0234 ◽

2017 ◽

Vol 72 (6) ◽

pp. 393-396

Author(s):

Liangyan Liu ◽

Jun Han ◽

Yong Shen

Keyword(s):

Solanum Tuberosum ◽

Late Blight ◽

Quantum Chemical ◽

Spectroscopic Analysis ◽

2D Nmr ◽

Moderate Activity ◽

Potato Tubers ◽

Mycelia Growth ◽

Late Blight Disease ◽

Blight Disease

AbstractTwo new defensive constituents, solatuberenol A (1) and 3-O-β-d-glucopyranosyl stigmasta-5(6),24(28)-diene (2), were isolated from the potato tubers (Solanum tuberosum) infected with late blight disease. Their structures were identified by extensive spectroscopic analysis, including HRMS, IR, UV, 1D/2D NMR, ECD and quantum chemical calculations. Compounds 1 and 2 showed moderate activity against Phytophthora infestans with mycelia-growth inhibition of 30.1% and 52.4%, respectively, at the concentration of 500 ppm.

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Phenotypic Characterization of Recent Clonal Lineages of Phytophthora infestans in the United States

Plant Disease ◽

10.1094/pdis-07-12-0682-re ◽

2013 ◽

Vol 97 (7) ◽

pp. 873-881 ◽

Cited By ~ 48

Author(s):

G. Danies ◽

I. M. Small ◽

K. Myers ◽

R. Childers ◽

W. E. Fry

Keyword(s):

United States ◽

Late Blight ◽

Phytophthora Infestans ◽

The United States ◽

Phenotypic Characterization ◽

Phenotypic Traits ◽

Mating Types ◽

Late Blight Disease ◽

Blight Disease

Phytophthora infestans, the causal agent of late blight disease, has been reported in the United States and Canada since the mid-nineteenth century. Due to the lack of or very limited sexual reproduction, the populations of P. infestans in the United States are primarily reproducing asexually and, thus, show a simple genetic structure. The emergence of new clonal lineages of P. infestans (US-22, US-23, and US-24) responsible for the late blight epidemics in the northeastern region of the United States in the summers of 2009 and 2010 stimulated an investigation into phenotypic traits associated with these genotypes. Mating type, differences in sensitivity to mefenoxam, differences in pathogenicity on potato and tomato, and differences in rate of germination were studied for clonal lineages US-8, US-22, US-23, and US-24. Both A1 and A2 mating types were detected. Lineages US-22, US-23, and US-24 were generally sensitive to mefenoxam while US-8 was resistant. US-8 and US-24 were primarily pathogenic on potato while US-22 and US-23 were pathogenic on both potato and tomato. Indirect germination was favored at lower temperatures (5 and 10°C) whereas direct germination, though uncommon, was favored at higher temperatures (20 and 25°C). Sporangia of US-24 released zoospores more rapidly than did sporangia of US-22 and US-23. The association of characteristic phenotypic traits with genotype enables the prediction of phenotypic traits from rapid genotypic analyses for improved disease management.

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The Assessment of Potato Late Blight Disease in Western Amhara Region, Ethiopia

SSRN Electronic Journal ◽

10.2139/ssrn.3882375 ◽

2021 ◽

Author(s):

Gebremariam Asaye Emrie ◽

Merkuz Abera Admassu ◽

Adane Tesfaye Lema

Keyword(s):

Late Blight ◽

Potato Late Blight ◽

Amhara Region ◽

Late Blight Disease ◽

Blight Disease

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Influence of weather parameters on alternaria leaf blight severity of makhana under the agro-climate of Koshi region of Bihar

Journal of Agrometeorology ◽

10.54386/jam.v23i1.88 ◽

2021 ◽

Vol 23 (1) ◽

pp. 54-59

Author(s):

SANTOSH KUMAR ◽

MD. NADEEM AKHTAR ◽

SANTOSH KUMAR ◽

MAHESH KUMAR ◽

TRIBHUWAN KUMAR

Keyword(s):

High Temperature ◽

Relative Humidity ◽

Disease Severity ◽

Infection Process ◽

Leaf Blight ◽

Alternaria Leaf Blight ◽

Weather Parameters ◽

Maximum Temperatures ◽

Blight Disease ◽

Cent Disease

Weather parameters play a pivotal role in the infection process and spread of pathogen. It also influences the expression of susceptibility/resistance of the host plant during post-infection phases. Therefore, an experiment was conducted for two consecutive cropping seasons (2018 &2019) to study the influence of weather parameters such as temperature, humidity, rainfall and wind direction on the emergence of alternaria leaf blight of makhana in Koshi region of Bihar. Maximum per cent disease severity of alternarialeaf blightwas observed during the peak monsoon months (June to August). Highest disease severity of leaf blight (14.80% & 15.7%) was observed in the mid June during crop season, 2018 and 2019. High temperature (36.9oC & 38.1oC), and relative humidity (94% & 96.4%) of both the year 2018 and 2019 were found correlated with higher severity to alternaria leaf blight. Similarly average HTR values (3.1) were also found correlated with the average high temperature and relative humidity of both years (2018 and 2019) in terms of severity of leaf blight disease. Maximum temperatures, relative humidity and rainfall exhibited strong positive linear relationship and influenced the occurrence of alternaria leaf blight disease significantly. We also developed a geo-phytopathological model for the prediction of alternaria leaf blight disease of makhana on the basis of congenial mean temperature and relative humidity.

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Plant pathogen effector utilizes host susceptibility factor NRL1 to degrade the immune regulator SWAP70

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.1808585115 ◽

2018 ◽

Vol 115 (33) ◽

pp. E7834-E7843 ◽

Cited By ~ 20

Author(s):

Qin He ◽

Shaista Naqvi ◽

Hazel McLellan ◽

Petra C. Boevink ◽

Nicolas Champouret ◽

...

Keyword(s):

Late Blight ◽

Plant Pathogens ◽

Dominant Negative ◽

Host Protein ◽

Host Susceptibility ◽

Dominant Negative Mutant ◽

Virus Induced Gene Silencing ◽

Pathogen Effector ◽

Late Blight Disease ◽

Blight Disease

Plant pathogens deliver effectors into plant cells to suppress immunity. Whereas many effectors inactivate positive immune regulators, other effectors associate with negative regulators of immunity: so-called susceptibility (S) factors. Little is known about how pathogens exploit S factors to suppress immunity. Phytophthora infestans RXLR effector Pi02860 interacts with host protein NRL1, which is an S factor whose activity suppresses INF1-triggered cell death (ICD) and is required for late blight disease. We show that NRL1 interacts in yeast and in planta with a guanine nucleotide exchange factor called SWAP70. SWAP70 associates with endosomes and is a positive regulator of immunity. Virus-induced gene silencing of SWAP70 in Nicotiana benthamiana enhances P. infestans colonization and compromises ICD. In contrast, transient overexpression of SWAP70 reduces P. infestans infection and accelerates ICD. Expression of Pi02860 and NRL1, singly or in combination, results in proteasome-mediated degradation of SWAP70. Degradation of SWAP70 is prevented by silencing NRL1, or by mutation of Pi02860 to abolish its interaction with NRL1. NRL1 is a BTB-domain protein predicted to form the substrate adaptor component of a CULLIN3 ubiquitin E3 ligase. A dimerization-deficient mutant, NRL1NQ, fails to interact with SWAP70 but maintains its interaction with Pi02860. NRL1NQ acts as a dominant-negative mutant, preventing SWAP70 degradation in the presence of effector Pi02860, and reducing P. infestans infection. Critically, Pi02860 enhances the association between NRL1 and SWAP70 to promote proteasome-mediated degradation of the latter and, thus, suppress immunity. Preventing degradation of SWAP70 represents a strategy to combat late blight disease.

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