Seasonal Dynamics of Alternaria during the Potato Growing Cycle and the Influence of Weather on the Early Blight Disease in North-West Spain

Escuredo, Olga; Seijo-Rodríguez, Ana; Meno, Laura; Seijo, María Carmen

doi:10.1007/s12230-019-09739-2

Cited by 19 publications

(15 citation statements)

References 30 publications

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“…In Spain, increases on temperatures, shorter winters and longer, drier and hotter summers are some of the reliable effects. Thus, a longer duration and intensity of early blight attacks in potato crops for future years is expected [5,18].…”

Section: Discussionmentioning

confidence: 99%

“…Wet periods favor germination and infection of Alternaria [18,25,41,42]. The relative humidity of air is the most studied variables influencing positively in the sporulation and infection of potato early blight [5,18,25]. However, some researchers concluded that leaf wetness duration together with potato variety are critical factors to forecast the risk of infection of early blight in Solanaceae [14].…”

Section: Discussionmentioning

confidence: 99%

“…In terms of economic losses, one of the most important fungal diseases is early blight caused by various Alternaria species. This pathogen has devastating effects in many potato-growing regions [3][4][5][6]. The main causal agents are the species A. solani Soraeur and A. alternata (Fr.)…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, a higher incidence of early blight has been observed on potato plants in A Limia [5,18]. Several researchers have highlighted the effects of global climatic changes on agricultural pests [19][20][21], considering the temperature as the main limiting factor [14,15,22,23].…”

Section: Introductionmentioning

confidence: 99%

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Modification of the TOMCAST Model with Aerobiological Data for Management of Potato Early Blight

et al. 2020

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The present study focuses on establishing thresholds of weather variables for predict early blight in potato crops. For this, the TOMCAST model was adjusted using weather variables and Alternaria conidia levels (mainly A. solani and A. alternata) during six growing seasons in A Limia (Northwest Spain). TOMCAST for the effective management of early blight considers leaf wetness and air temperature to calculate daily severity values (DSVs). Spearman correlations between temperature (minimum and average), mean temperature during leaf wetness period and Alternaria concentration showed the highest positive significant coefficients (0.386, 0.230 and 0.372, respectively; p < 0.01). Specifically, Alternaria levels higher than 50 spores/m3 were found the days with air mean temperature above 18 °C, more than 7 h of leaf wetness. Leaf wetness was decisive to estimate the concentration of Alternaria, resulting in a significant linear regression model (R2 = 0.41; p < 0.001). TOMCAST was adapted to the area, considering 10 °C the minimum threshold for the mean value of temperature during the wet period and 10–15 accumulated disease severity values (DSV). Using TOMCAST, it was possible to predict the first Alternaria peak in most of potato growing seasons. Combining aerobiological and meteorological data to control fungal diseases during crops are a useful tool for sustainable agriculture.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modification of the TOMCAST Model with Aerobiological Data for Management of Potato Early Blight

et al. 2020

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“…The mild temperature and mean rainfall recorded in winter represent the oceanic features, while the drought periods, accompanied by a great thermal amplitude in summer correspond to the continental features of the area. In the last decade, the annual average temperature in the A Limia region (based on an analysis of data obtained from various meteorological stations in the area) has increased by approximately 1.6 • C [33,34]. This progressive increase in temperature could affects the development of potato crops.…”

Section: Discussionmentioning

confidence: 99%

Changes in the Morphological Characteristics of Potato Plants Attributed to Seasonal Variability

et al. 2020

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The development of a potato crop differs according to the environmental conditions and growing season of an area. Periods of high temperatures and drought have been frequent in recent years, and this has affected crops worldwide. The effect of meteorological factors on the plant morphology of potato cultivars growing in A Limia was analyzed for three consecutive years. The crop cycle with the highest temperatures and least accumulated rainfall (2016) showed plants with a higher number of leaflets, which were shorter in length. The crop cycle (2014) with a lower temperature and more rainfall had the tallest plants, the highest degree of flowering, fewer pairs of leaflets and the highest length of the floral peduncle. Kennebec and Fontane were the varieties that showed the least variability in morphological characteristics during the seasons analyzed. Considering the meteorological and morphological data, a principal component analysis was carried out, which explained 80.1% of the variance of the data. Spearman rank correlations showed higher significant coefficients between the temperature and foliar characteristics. The leaf size of plants was estimated using a multiple linear regression analysis, which included the mean temperature, explaining 64% of the variability of the data.

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Review: Holistic pest management against early blight disease towards sustainable agriculture

Jindo

Evenhuis

Kempenaar

et al. 2021

Pest Management Science

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Alternaria species are well‐known aggressive pathogens that are widespread globally and warmer temperatures caused by climate change might increase their abundance more drastically. Early blight (EB) disease, caused mainly by Alternaria solani, and brown spot, caused by Alternaria alternata, are major concerns in potato, tomato and eggplant production. The development of EB is strongly linked to varieties, crop development stages, environmental factors, cultivation and field management. Several forecasting models for pesticide application to control EB were created in the last century and more recent scientific advances have included modern breeding technology to detect resistant genes and precision agriculture with hyperspectral sensors to pinpoint damage locations on plants. This paper presents an overview of the EB disease and provides an evaluation of recent scientific advances to control the disease. First of all, we describe the outline of this disease, encompassing biological cycles of the Alternaria genus, favorite climate and soil conditions as well as resistant plant species. Second, versatile management practices to minimize the effect of this pathogen at field level are discussed, covering their limitations and pitfalls. A better understanding of the underlying factors of this disease and the potential of novel research can contribute to implementing integrated pest management systems for an ecofriendly farming system. © 2021 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Seasonal Dynamics of Alternaria during the Potato Growing Cycle and the Influence of Weather on the Early Blight Disease in North-West Spain

Cited by 19 publications

References 30 publications

Modification of the TOMCAST Model with Aerobiological Data for Management of Potato Early Blight

Modification of the TOMCAST Model with Aerobiological Data for Management of Potato Early Blight

Changes in the Morphological Characteristics of Potato Plants Attributed to Seasonal Variability

Review: Holistic pest management against early blight disease towards sustainable agriculture

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