Stempedia: a weather-based model to explore and manage the risk of lentil Stemphylium blight disease

Salam, Moin U.; ., T.K. Day; Ahmed, Ashraf Uddin; Nessa, B; Haque, A. H. M. M.; Subedi, Subash; Malik, Al Imran; Rahman, M. M.; Erskine, William

doi:10.1007/s13313-016-0434-3

Cited by 8 publications

(9 citation statements)

References 8 publications

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“…The Stempedia model predicts the potential severity of Stemphylium blight disease and associated yield reductions in lentil based on sowing date, first flowering date, and daily weather; model performance has been verified in western Nepal [49]. The model assumes that inoculum does not limit disease progression.…”

Section: Simulating Stemphylium Blight Disease Severity Simulation Usmentioning

confidence: 99%

“…Erskine and El Ashkar [47] reported that variability in rainfall during the lentil production period is responsible for 41% of the variation in mean yields. Furthermore, in recent years, the fungal disease Stemphylium blight (Stemphylium botryosum), has emerged as a major threat to lentil production in South Asia, including in Nepal [49,50]. Consequently, lentil yields in Nepal are judged to be highly sensitive to both rainfall deficit and rainfall excess, extremes that some projections suggest may increase in the future [51].…”

Section: Introductionmentioning

confidence: 99%

“…For the study region in the Mid-and Far-western Terai plain and mid-hill region of Nepal (henceforth 'western' Nepal), this study integrates three complementary research activities: 1) household surveys (2014 and 2015 harvests) to assess current productivity levels and drivers of technical efficiencies, 2) on-farm trials to assess the value of new agronomic production practices and varieties (2012/13-16/17), and 3) simulations with the Stempedia model [49] to assess inter-annual variations in Stemphylium disease risk and to establish the risk-reducing value of modifying planting dates.…”

Section: Introductionmentioning

confidence: 99%

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Climate and landscape mediate patterns of low lentil productivity in Nepal

Paudel¹,

Devkota²,

Keil

et al. 2020

PLoS ONE

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Lentil (Lens culinaris Medik.) is a cool-season pulse grown in winter cropping cycle in South Asia and provides a major source of nutrition for many low-income households. Lentil productivity is perceived to be sensitive to high rainfall, but few studies document spatial and temporal patterns of yield variation across climate, soil, and agronomic gradients. Using farm survey data from Nepal, this study characterizes patterns of lentil productivity and efficiency for two cropping seasons. Additional insights were derived from on-farm trials conducted over a 5-year period that assess agronomic, drainage, and cultivar interventions. To contextualize the inferences derived from farm surveys and trials, the Stempedia model was used to simulate the severity of Stemphylium blight (Stemphylium botryosum) risk-the principal fungal disease in lentil-with 30 years of historical climate data. Although development efforts in Nepal have prioritized pulse intensification, results confirm that lentil remains a risky enterprise highlighting the prevalence of crop failures (16%), modest yields (353 kg ha

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Section: Simulating Stemphylium Blight Disease Severity Simulation Usmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Climate and landscape mediate patterns of low lentil productivity in Nepal

Paudel¹,

Devkota²,

Keil

et al. 2020

PLoS ONE

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“…on many hosts and scheduling of fungicidal spray based on temperature and leaf wetness periods. Stempedia, a weather-based model was developed to understand the risk of SB disease in Bangladesh [59]. Sowing date, date of first flowering, and daily weather variables, like maximum temperature and sunshine hours, are the important input parameters of this model.…”

Section: Integrated Disease Managementmentioning

confidence: 99%

Current Knowledge on Pathogenicity and Management of Stemphylium botryosum in Lentils (Lens culinaris ssp. culinaris Medik)

et al. 2019

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Stemphylium blight (SB) caused by Ascomycete, Stemphylium botryosum Wallr. has been a serious threat to lentil cultivation, mainly in Bangladesh, Nepal, India, and Canada since its first outbreak in Bangladesh in 1986. The genus Stemphylium Wallr., a dematiaceous hyphomycete, comprises up to 150 species, and is pathogenic on a wide range of plants infecting leguminous as well as nonleguminous crops. In recent years, studies indicated overlapping in morphological characters among the different species under the genus Stemphylium, making the identification and description of species difficult. This necessitates different molecular phylogenetic analysis in species delimitation. Therefore, a detailed understanding of spatial diversity and population structure of the pathogen is pertinent for producing source material for resistance breeding. The role of different weather variables as predisposing factors for the rapid spread of the pathogen necessitates devising a disease predictive model for the judicial application of fungicides. A dearth of information regarding spore biology, epidemiology, race diversity, host-pathogen interaction, and holistic disease management approach necessitates immediate attention towards more intensive research efforts. This is the first comprehensive review on the current state of knowledge and research efforts being made for a better understanding of the SB resistance through cognizing biology, ecology, and epidemiology of S. botryosum and effective disease management strategies to prevent widespread outbreaks of SB. The information regarding the biology and epidemiology of S. botryosum is also crucial for strengthening the “Integrated Disease Management” (IDM) programme. The need for a regional research network is advocated where the disease is becoming endemic.

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“…Disease severity data was recorded in three times on the basis of 0-5 scale where, 0= No infection (HR), 1= Few scattered leaf but no twig blighted (R), 2= 5-10% leaflets infected and/or few scattered twig blighted (MS), 3= 11-20% leaflets infected and/or 1-5% twig blighted (MS), 4= 21-50% leaflet infected and/or 6-10% twig blighted (S) and 5= above 51% leaflet infected and/or more than 10% twig blighted (HS) [8,9].…”

Section: Assessment Of Stemphylium Blightmentioning

confidence: 99%

Screening of Lentil Germplasm Against Stemphylium Blight by Observing Disease Reaction in Three Different Stages

Razzak¹,

Islam²,

Rahman³

et al. 2018

Malays. j. halal res.

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Stemphylium blight of lentil (Stemphylium botryosum) a standout amongst the most vital constraints of lentil production in Bangladesh. An investigation was carried out at the Regional Agricultural Research Station (RARS), Bangladesh Agriculture Research Institute (BARI), Rahmatpur, Barisal to pick out lentil germplasms against Stemphylium blight. Under the present study 100 lentil lines and 2 check varieties were evaluated for their reaction to Stemphylium blight and yield performance under natural epiphytotic condition at three growth stage namely flowering stage, pod setting stage and maturity stage. Altogether 102 lines/varieties were screened where 5, 91 and 6 lines were selected as Highly Resistant (HR), Resistant (R) and Moderately Resistant (MR) respectably at flowering stage. The highly resistant 5 lines were BD-3921, BD-3930, BD-3931, BARI Masur-7 and Local check. In pod setting stage, out of 102 lines/varieties, 16, 78 and 8 lines were showed Resistant (R), Moderately Resistant (MR) and Moderately Susceptible (MS) reaction, respectably, to stemphylium blight disease of lentil. During maturity, 40, 52 and10 lines out of 102 lines/varieties were expressed as Moderately Resistant (MR), Moderately Susceptible (MS) and Susceptible (S) reaction, respectively.

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Stempedia: a weather-based model to explore and manage the risk of lentil Stemphylium blight disease

Cited by 8 publications

References 8 publications

Climate and landscape mediate patterns of low lentil productivity in Nepal

Climate and landscape mediate patterns of low lentil productivity in Nepal

Current Knowledge on Pathogenicity and Management of Stemphylium botryosum in Lentils (Lens culinaris ssp. culinaris Medik)

Screening of Lentil Germplasm Against Stemphylium Blight by Observing Disease Reaction in Three Different Stages

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