Cotton Leafroll Dwarf Disease: An Emerging Virus Disease on Cotton in the U.S.

Bag, Sudeep; Roberts, Phillip M.; Kemerait, Robert C.

doi:10.1002/crso.20105

Cited by 13 publications

(10 citation statements)

References 9 publications

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“…The critical need to control cotton volunteers is actually driven by boll weevil (Anthonomus grandis Boem.) and cotton diseases such as the newly identified cotton leafroll dwarf virus disease (Bag et al 2019;Francischini et al 2019;Greenberg et al 2007).…”

Section: Interference Of Herbicide-resistant Cotton Volunteersmentioning

confidence: 99%

“…Cotton leafroll dwarf virus disease, transmitted by aphids, was identified in the United States during 2017. With no current leafroll dwarf virus-resistant cotton cultivars, concern of spread and impact has become relevant (Bag et al 2019). Preventing cotton plants and potentially the disease from overwintering may be one critical component in a long-term disease mitigation plan protecting the cotton industry (Nichols 2020).…”

Section: Interference Of Herbicide-resistant Cotton Volunteersmentioning

confidence: 99%

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Interference and management of herbicide-resistant crop volunteers

et al. 2021

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Since the commercialization of herbicide-resistant (HR) crops, primarily glyphosate-resistant (GR) crops, their adoption increased rapidly. Multiple HR traits in crops such as canola (Brassica napus L.), corn (Zea mays L.), cotton (Gossypium hirsutum L.), and soybean [Glycine max (L.) Merr.] are available in recent years, and management of their volunteers need attention to prevent interference and yield loss in rotational crops. The objectives of this review were to summarize HR crop traits in barley (Hordeum vulgare L.), canola, corn, cotton, rice (Oryza sativa L.), soybean, sugarbeet (Beta vulgaris L.), and wheat (Triticum aestivum L.); assess their potential for volunteerism; and review existing literature on the interference of HR crop volunteers, yield loss, and their management in rotational crops. Herbicide-resistant crop volunteers are problem weeds in agronomic cropping systems, and the impact of volunteerism depends on several factors such as crop grown in rotation, the density of volunteers, management practices, and micro-climate. Interference of imidazolinone-resistant (IR) barley or wheat volunteers can be a problem in rotational crops, particularly when IR crops such as canola or wheat are grown. Herbicide-resistant canola volunteers are abundant in the Northern Great Plains due to high fecundity, seed loss before or during harvest, secondary seed dormancy, and can interfere in crops grown in rotation such as flax (Linum usitatissimum L.), field peas (Pisum sativum L.), and soybean. Herbicide-resistant corn volunteers are competitive in crops grown in rotation such as corn, cotton, soybean, and sugarbeet, with yield loss depending on the density of HR corn volunteers. Volunteers of HR cotton, rice, soybean, and sugarbeet are not major concerns and can be controlled with existing herbicides. Herbicide options would be limited if the crop volunteers are multiple HR; therefore, a record-keeping of cultivar planted the previous year and selecting herbicide is important. The increasing use of 2,4-D, dicamba, glufosinate, and glyphosate in North American cropping systems requires research on herbicide interactions and alternative herbicides or methods for controlling multiple HR crop volunteers.

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Section: Interference Of Herbicide-resistant Cotton Volunteersmentioning

confidence: 99%

Section: Interference Of Herbicide-resistant Cotton Volunteersmentioning

confidence: 99%

Interference and management of herbicide-resistant crop volunteers

et al. 2021

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“…Cotton leafroll dwarf virus (CLRDV; family Solemoviridae, genus Polerovirus) is known to cause cotton blue disease (CBD), and its occurrence was first reported in Africa in 1949, followed by reports of the disease in Asia and South America (Fang et al, 2010). Cotton yield losses up to 80% have been observed from CLRDV in South America (Silva et al, 2008), and the virus is now an emerging threat to cotton production in the United States (Avelar et al, 2019). CLRDV was first reported in Alabama in 2017 (Avelar et al, 2019) and has subsequently been documented in 10 other cotton producing states, with disease incidence varying from less than 1% to more than 20% across the United States cotton belt (Aboughanem-Sabanadzovic et al, 2019;Tabassum et al, 2019;Alabi et al, 2020;Faske et al, 2020;Iriarte et al, 2020;Price et al, 2020;Thiessen et al, 2020;Wang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Cotton yield losses up to 80% have been observed from CLRDV in South America (Silva et al, 2008), and the virus is now an emerging threat to cotton production in the United States (Avelar et al, 2019). CLRDV was first reported in Alabama in 2017 (Avelar et al, 2019) and has subsequently been documented in 10 other cotton producing states, with disease incidence varying from less than 1% to more than 20% across the United States cotton belt (Aboughanem-Sabanadzovic et al, 2019;Tabassum et al, 2019;Alabi et al, 2020;Faske et al, 2020;Iriarte et al, 2020;Price et al, 2020;Thiessen et al, 2020;Wang et al, 2020). Interestingly, cotton plants infected with the United States strains of CLRDV showed different symptoms from CBD; therefore, the disease caused by this virus has been named as cotton leafroll dwarf disease (CLRDD; Brown et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Effect of Cotton Leafroll Dwarf Virus on Physiological Processes and Yield of Individual Cotton Plants

et al. 2021

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Cotton leafroll dwarf disease (CLRDD) caused by cotton leafroll dwarf virus (CLRDV) is an emerging threat to cotton production in the United States. The disease was first reported in Alabama in 2017 and subsequently has been reported in 10 other cotton producing states in the United States, including Georgia. A field study was conducted at field sites near Tifton, Georgia in 2019 and 2020 to evaluate leaf gas exchange, chlorophyll fluorescence, and leaf temperature responses for a symptomatic cultivar (diseased plants observed at regular frequency) at multiple stages of disease progression and for asymptomatic cultivars (0% disease incidence observed). Disease-induced reductions in net photosynthetic rate (An, decreased by 63–101%), stomatal conductance (gs, decreased by 65–99%), and efficiency of the thylakoid reactions (32–92% decline in primary photochemistry) were observed, whereas leaf temperature significantly increased by 0.5–3.8°C at advanced stages of the disease. Net photosynthesis was substantially more sensitive to disease-induced declines in gs than the thylakoid reactions. Symptomatic plants with more advanced disease stages remained stunted throughout the growing season, and yield was reduced by 99% by CLRDD due to reductions in boll number per plant and declines in boll mass resulting from fewer seeds per boll. Asymptomatic cultivars exhibited more conservative gas exchange responses than apparently healthy plants of the symptomatic cultivar but were less productive. Overall, it is concluded that CLRDV limits stomatal conductance and photosynthetic activity of individual leaves, causing substantial declines in productivity for individual plants. Future studies should evaluate the physiological contributors to genotypic variation in disease tolerance under controlled conditions.

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“…Plants infected with CLRDV may develop shortened internodes, and thus the extent of overall stunting may range from extensive to none. Infected cotton leaves may develop reddening of leaf blades and petioles, curling and downward cupping, blue green, intense green, or red rust-coloration, vein-yellowing, or blistering, with yield loss attributed to reduced boll set [14,18,19,32,33]. Perhaps unexpectedly, CLRDV has been found to infect non-cotton hosts, including several uncultivated plant species [34].…”

Section: Introductionmentioning

confidence: 99%

Cotton Leafroll Dwarf Virus US Genomes Comprise Divergent Subpopulations and Harbor Extensive Variability

Ramos-Sobrinho

Adegbola

Lawrence

et al. 2021

Viruses

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Cotton leafroll dwarf virus (CLRDV) was first reported in the United States (US) in 2017 from cotton plants in Alabama (AL) and has become widespread in cotton-growing states of the southern US. To investigate the genomic variability among CLRDV isolates in the US, complete genomes of the virus were obtained from infected cotton plants displaying mild to severe symptoms from AL, Florida, and Texas. Eight CLRDV genomes were determined, ranging in size from 5865 to 5867 bp, and shared highest nucleotide identity with other CLRDV isolates in the US, at 95.9–98.7%. Open reading frame (ORF) 0, encoding the P0 silencing suppressor, was the most variable gene, sharing 88.5–99.6% and 81.2–89.3% amino acid similarity with CLRDV isolates reported in cotton growing states in the US and in Argentina and Brazil in South America, respectively. Based on Bayesian analysis, the complete CLRDV genomes from cotton in the US formed a monophyletic group comprising three relatively divergent sister clades, whereas CLRDV genotypes from South America clustered as closely related sister-groups, separate from US isolates, patterns reminiscent of phylogeographical structuring. The CLRDV isolates exhibited a complex pattern of recombination, with most breakpoints evident in ORFs 2 and 3, and ORF5. Despite extensive nucleotide diversity among all available CLRDV genomes, purifying selection (dN/dS < 1) was implicated as the primary selective force acting on viral protein evolution.

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Cotton Leafroll Dwarf Disease: An Emerging Virus Disease on Cotton in the U.S.

Cited by 13 publications

References 9 publications

Interference and management of herbicide-resistant crop volunteers

Interference and management of herbicide-resistant crop volunteers

Effect of Cotton Leafroll Dwarf Virus on Physiological Processes and Yield of Individual Cotton Plants

Cotton Leafroll Dwarf Virus US Genomes Comprise Divergent Subpopulations and Harbor Extensive Variability

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