Dissecting the economic impact of soybean diseases in the United States over two decades

Bandara, Ananda Y.; Weerasooriya, Dilooshi K.; Bradley, Carl A.; Allen, Tom; Esker, Paul D.

doi:10.1101/655837

Cited by 17 publications

(10 citation statements)

References 46 publications

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“…However, because of the difficulty and complexity of assessing yield and economic losses caused only by CLB and PSS under field conditions, there are still no accurate estimates of yield losses in Argentina. In the USA, the average economic losses due to CLB/PSS across 28 states were estimated at $77.8 million per year between 1996 to 2016 (Bandara et al ., 2020).…”

Section: Introductionmentioning

confidence: 99%

Fungicide resistance in Cercospora species causing cercospora leaf blight and purple seed stain of soybean in Argentina

et al. 2020

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Cercospora species cause cercospora leaf blight (CLB) and purple seed stain (PSS) on soybean. Because there are few resistant soybean varieties available, CLB/PSS management relies heavily upon fungicide applications. Sensitivity of 62 Argentinian Cercospora isolates to demethylation inhibitor (DMI), methyl benzimidazole carbamate (MBC), quinone outside inhibitor (QoI), succinate dehydrogenase inhibitor (SDHI) fungicides, and mancozeb was determined in this study. All isolates were sensitive to difenoconazole, epoxiconazole, prothioconazole, tebuconazole, and cyproconazole (EC50 values ranged from 0.006 to 2.4 µg/ml). In contrast, 51% of the tested isolates were sensitive (EC50 values ranged from 0.003 to 0.2 µg/ml), and 49% were highly resistant (EC50 > 100 µg/ml) to carbendazim. Interestingly, all isolates were completely resistant to azoxystrobin, trifloxystrobin, and pyraclostrobin, and insensitive to boscalid, fluxapyroxad, and pydiflumetofen (EC50 > 100 µg/ml). The G143A mutation was detected in 82% (53) of the QoI‐resistant isolates and the E198A mutation in 97% (31) of the carbendazim‐resistant isolates. No apparent resistance mutations were detected in the succinate dehydrogenase genes (subunits sdhB, sdhC, and sdhD). Mancozeb completely inhibited mycelial growth of the isolates evaluated at a concentration of 100 µg/ml. All Argentinian Cercospora isolates were sensitive to the DMI fungicides tested, but we report for the first time resistance to QoI and MBC fungicides. Mechanism(s) other than fungicide target‐site modification may be responsible for resistance of Cercospora to QoI and MBC fungicides. Moreover, based on our results and on the recent introduction of SDHI fungicides on soybean in Argentina, Cercospora species causing CLB/PSS are insensitive (naturally resistant) to SDHI fungicides. Insensitivity must be confirmed under field conditions.

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Section: Introductionmentioning

confidence: 99%

Fungicide resistance in Cercospora species causing cercospora leaf blight and purple seed stain of soybean in Argentina

et al. 2020

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“…Soybean production is continuously challenged by various abiotic and biotic factors including unpredictable weather, diseases, insect pests, weeds and variable soil quality (Bandara et al., 2020; Bandara, Weerasooriya, Conley, et al, 2020), but is disproportionately impacted by climate change‐associated abiotic factors. For instance, from 1994 to 2013, variability in growing season temperature and precipitation caused by climate change was estimated to reduce soybean seed yield gain in the U.S. by approximately 30%, which translated into an economic loss of US$11 billion (Mourtzinis et al., 2015).…”

Section: Soybean Production In the United States And Perceived Impactmentioning

confidence: 99%

Prospects of alleviating early planting‐associated cold susceptibility of soybean using microbes: New insights from microbiome analysis

Bandara

Weerasooriya

Bell

et al. 2020

J Agronomy Crop Science

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Cold susceptibility is a concern when growing crops of tropical origin in temperate regions. Crops such as rice, corn, sorghum, and soybean are generally susceptible to chilling stress. From production standpoint, a crop's cold tolerance is particularly important when the general recommendation is to adopt earlier than currently practicing planting dates in the spring. Early planting is a potential route to increase soybean yield in the United States. Nonetheless, early planting is often not practically feasible due to low soil temperatures. Although some commercial varieties are cold‐tolerant, soybean is generally prone to cold stress. Soil temperatures below 10°C reduce germination and seedling vigour. Cold temperatures can also increase soybean vulnerability to soilborne seed/seedling diseases. Microorganisms are experimentally shown to alleviate cold stress in agriculturally important crops such as rice, wheat, tomato and grapes. Although microbial inoculants are available to augment soybean yields through enhanced nitrogen fixation, phosphorus solubilization and improved water/nutrient uptake, currently there are no commercially available inoculants to enhance soybean cold tolerance. Here we provide insights into the value of soybean rhizosphere microbiome analysis to identify microbial taxa that could potentially enhance soybean cold tolerance. Formulation of promising candidates into a seed treatment could contribute to early planting‐enabled soybean yield gains.

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“…is the most important legume crop worldwide, being used in human and animal nutrition, and industrial applications. Soybean diseases are responsible for an economic loss of 4.6 billion dollars only in the US [11]. Likewise, soybean yield is significantly affected by multiple environmental factors [12].…”

Section: Introductionmentioning

confidence: 99%

Pathogenesis-related protein 1 (PR-1) genes in soybean: genome-wide identification, structural analysis and expression profiling under multiple biotic and abiotic stresses

Almeida‐Silva

Venancio

2021

Preprint

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Plant pathogenesis-related (PR) proteins are a large group of proteins, classified in 17 families, that are induced by pathological conditions. Here, we characterized the soybean PR-1 (GmPR-1) gene repertoire at the sequence, structural and expression levels. We found 24 GmPR-1 genes, clustered in two phylogenetic groups. GmPR-1 genes are under strong purifying selection, particularly those that emerged by tandem duplications. GmPR-1 promoter regions are abundant in cis-regulatory elements associated with major stress-related transcription factor families, namely WRKY, ERF, HD-Zip, C2H2, NAC, and GATA. We observed that 23 GmPR-1 genes are induced by stress conditions or exclusively expressed upon stress. We explored 1972 transcriptome samples, including 26 stress conditions, revealing that most GmPR-1 genes are differentially expressed in a plethora of biotic and abiotic stresses. Our findings highlight stress-responsive GmPR-1 genes with potential biotechnological applications, such as the development of transgenic lines with increased resistance to biotic and abiotic stresses.

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Dissecting the economic impact of soybean diseases in the United States over two decades

Cited by 17 publications

References 46 publications

Fungicide resistance in Cercospora species causing cercospora leaf blight and purple seed stain of soybean in Argentina

Fungicide resistance in Cercospora species causing cercospora leaf blight and purple seed stain of soybean in Argentina

Prospects of alleviating early planting‐associated cold susceptibility of soybean using microbes: New insights from microbiome analysis

Pathogenesis-related protein 1 (PR-1) genes in soybean: genome-wide identification, structural analysis and expression profiling under multiple biotic and abiotic stresses

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