Widespread Occurrence of Quinone Outside Inhibitor Fungicide-Resistant Isolates of <i>Cercospora sojina</i>, Causal Agent of Frogeye Leaf Spot of Soybean, in the United States

Zhang, Guirong; Allen, Tom; Bond, Jason P.; Fakhoury, Ahmad M.; Dorrance, Anne E.; Weber, L.; Faske, Travis; Giesler, Loren J.; Hershman, D. E.; Kennedy, Brenda; Neves, Danilo L.; Hollier, C. A.; Kelly, Heather; Newman, M. A.; Kleczewski, Nathan M.; Koenning, S. R.; Thiessen, Lindsey; Mehl, H. L.; Zhou, Tian; Meyer, Michael D.; Mueller, Daren S.; Kandel, Yuba R.; Price, Paul P.; Rupe, J. C.; Sikora, Edward J.; Standish, Jeffrey R.; Tomaso‐Peterson, Maria; Wise, Kiersten; Bradley, Carl A.

doi:10.1094/php-04-18-0016-rs

Cited by 43 publications

(22 citation statements)

References 16 publications

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“…For example, compared to the control, application of benomyl at different application timings based on growth stage did not significantly reduce frogeye leaf spot severity or associated grain yield loss on resistant soybean genotypes, although significant disease severity and yield loss reductions were observed with susceptible soybean genotypes [39]. Resistance within the targeted pathogen population to the active ingredient contained in the applied fungicide/s could also contribute to a positive relationship between fungicide use and yield losses [28, 29, 31–33]. Furthermore, fungicides are applied with self-propelled, pull type, or aerial spray applicators in the U.S.…”

Section: Discussionmentioning

confidence: 99%

“…Widespread fungicide use can ultimately lead to an increased risk of selecting fungicide-resistant strains out of the targeted pathogen population. Fungicide resistance is an issue increasing in importance across soybean production areas in the U.S. as a result of automatic fungicide applications at specific growth stages, as well as fungicide applications with specific fungicide classes where the goal is a curative response [28–31]. Currently, QoI fungicide resistance has been reported for several soybean pathogens in the U.S., including C. sojina , in Illinois, Tennessee [32], South Dakota [33], and Mississippi [29].…”

Section: Introductionmentioning

confidence: 99%

“…Currently, QoI fungicide resistance has been reported for several soybean pathogens in the U.S., including C. sojina , in Illinois, Tennessee [32], South Dakota [33], and Mississippi [29]. Zhang et al [31] recently reported QoI resistant C. sojina isolates from 14 states including Alabama, Arkansas, Delaware, Illinois, Indiana, Iowa, Kentucky, Louisiana, Mississippi, Missouri, North Carolina, Ohio, Tennessee, and Virginia. Additionally, the fungi responsible for causing Cercospora leaf blight ( C .…”

Section: Introductionmentioning

confidence: 99%

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Modeling the relationship between estimated foliar fungicide use and soybean yield losses due to foliar fungal diseases in the United States

Bandara

Weerasooriya

Conley

et al. 2019

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24Fungicide use in the United States to manage soybean diseases has increased in recent years. The 25 ability of fungicides to reduce disease-associated yield losses varies greatly depending on multiple 26 factors. Nonetheless, historical data are useful to understand the broad sense and long-term trends 27 related to fungicide use practices. In the current study, the relationship between estimated soybean 28 yield losses due to selected foliar diseases and foliar fungicide use was investigated using annual 29 data from 28 soybean growing states over the period of 2005 to 2015. At a national scale, a 30 significant quadratic relationship was observed between total estimated yield losses and total 31 fungicide use (R 2 = 0.123, P < 0.0001) where yield losses initially increased, reached a plateau, 32 and subsequently decreased with increasing fungicide use. The positive phase of the quadratic 33 curve could be associated with insufficient amount of fungicides being used to manage targeted 34 diseases, application of more-than-recommended prophylactic fungicides under no/low disease 35 pressure, application of curative fungicides after economic injury level, and reduced fungicide 36 efficacy due to a variety of factors such as unfavorable environmental conditions and resistance of 37 targeted pathogen populations to the specific active ingredient applied. Interestingly, a significant 38 quadratic relationship was also observed between total soybean production and total foliar 39 fungicide use (R 2 = 0.36, P < 0.0001). The positive phase of the quadratic curve may suggest that 40 factors like plant physiological changes, including increased chlorophyll content, photosynthetic 41 rates, water use efficiency, and delayed senescence that have been widely reported to occur after 42 application of certain foliar fungicides could have potentially contributed to enhanced yield. 43Therefore, the current study provides evidence of the potential usefulness of foliar fungicide 44 applications to mitigate soybean yield losses associated with foliar diseases and their potential to 45 3 positively impact soybean production/yield at national and regional scales although discrepancies 46 to the general trends observed at national and regional scales do prevail at the local (state) level. 47 48 49 50 51 Soybean [Glycine max (L.) Merrill] is a key agricultural commodity in the United States and has 52 been cultivated on 34.7 million hectares on average annually between 2015 and 2019 (USDA-53 NASS). Similar to the production of other economically important crops, numerous abiotic and 54 biotic stressors like adverse weather, variation in soil characteristics, diseases, insects, and weeds 55 present enormous challenges to soybean production [1, 2]. Soybean diseases are detrimental to 56 production due to their deleterious effects on yield. In the U.S., the average annual disease-57 associated soybean yield losses are approximately 11% [3]. However, the relative importance of 58 diseases and concomitant yield losses vary both tempora...

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling the relationship between estimated foliar fungicide use and soybean yield losses due to foliar fungal diseases in the United States

Bandara

Weerasooriya

Conley

et al. 2019

Preprint

Self Cite

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show abstract

“…A variety of practices can be used individually or in combination to mitigate the negative impact of diseases, including, pesticide applications, seed sanitation and cultural techniques, and deployment of resistance. Nonetheless, long-term control of soybean diseases has been challenging due to several reasons including the lack of durable resistance (e.g., soybean cyst nematode- [11]), lack of resistant cultivars (e.g., soybean rust- [12]) or partially resistant cultivars (e.g., Sclerotinia sclerotiorum- [13]), lack of highly efficacious fungicides (e.g., S. sclerotiorum- [14]), development of fungicide resistance (e.g., Cercospora sojina variant isolates that are nonresponsive to quinone outside inhibitor (QoI) fungicides- [15]), and extreme environmental stress (e.g., charcoal rot under drought- [16]).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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Soybean (Glycine max L. Merrill) is an economically important commodity for United States agriculture. Nonetheless, the profitability of soybean production has been negatively impacted by soybean diseases. The economic impacts of 23 common soybean diseases were estimated in 28 soybean-producing states in the U.S., from 1996 to 2016 (the entire data set consisted of 13,524 data points). Estimated losses were investigated using a variety of statistical approaches. The main effects of state, year, pre-and post-discovery of soybean rust, region, and zones based on yield, harvest area, and production, were significant on "total economic loss" as a function of diseases. Across states and years, the soybean cyst nematode, charcoal rot, and seedling diseases were the most economically damaging diseases while soybean rust, bacterial blight, and southern blight were the least economically damaging. A significantly greater mean loss (51%) was observed in states/years after the discovery of soybean rust (2004 to 2016) compared to the pre-discovery (1996 to 2003).

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“…A variety of practices can be used individually or in combination to mitigate the negative impact of diseases, including, pesticide applications, seed sanitation and cultural techniques, and deployment of resistance. Nonetheless, long-term control of soybean diseases has been challenging due to several reasons including the lack of durable resistance (e.g., soybean cyst nematode - Niblack et al 2002), lack of resistant cultivars (e.g., soybean rust - Yorinori et al 2005) or partially resistant cultivars (e.g., Sclerotinia sclerotiorum - Kim and Diers 2000), lack of highly efficacious fungicides (e.g., S. sclerotiorum - Peltier et al 2012), development of fungicide resistance (e.g., Cercospora sojina variant isolates that are nonresponsive to quinone outside inhibitor (QoI) fungicides - Zhang et al 2018), and extreme environmental stress (e.g., charcoal rot under drought - Mengistu et al 2011).…”

Section: Introductionmentioning

confidence: 99%

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

Bandara

Weerasooriya

Bradley

et al. 2019

Preprint

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ABSTRACTSoybean (Glycine max L. Merrill) is a key commodity for United States agriculture. Here we analyze the economic impacts of 23 common soybean diseases in 28 soybean-producing states in the U.S., from 1996 to 2016. From 1996 to 2016, the total estimated economic loss due to soybean diseases in the U.S. was $81.39 billion, with $68.98 billion and $12.41 billion accounting for the northern and southern U.S. losses, respectively. Across states and years, soybean cyst nematode, charcoal rot, and seedling diseases were the most economically damaging pathogens/diseases while soybean rust, bacterial blight, and southern blight were the least economically damaging. Significantly positive linear correlation of mean soybean yield loss with the mean state-wide soybean production (MT) and mean soybean yield (kg ha−1) indicated that high production zones are more vulnerable to soybean diseases-associated yield losses. Our findings provide useful insights into how research, policy, and educational efforts should be prioritized in soybean disease management.

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Widespread Occurrence of Quinone Outside Inhibitor Fungicide-Resistant Isolates of Cercospora sojina, Causal Agent of Frogeye Leaf Spot of Soybean, in the United States

Cited by 43 publications

References 16 publications

Modeling the relationship between estimated foliar fungicide use and soybean yield losses due to foliar fungal diseases in the United States

Modeling the relationship between estimated foliar fungicide use and soybean yield losses due to foliar fungal diseases in the United States

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

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

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