First Report of <i>Cotton leafroll dwarf virus</i> Associated with Cotton Blue Disease Symptoms in Alabama

Avelar, S.; Schrimsher, Drew W.; Lawrence, Kathy; Brown, Judith K.

doi:10.1094/pdis-09-18-1550-pdn

Cited by 48 publications

(42 citation statements)

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“…In addition to Africa and South America, CLRDV has also been reported in Timor-Leste [ 14 ], Thailand [ 15 ], India [ 16 ], and from Soybean aphid ( Aphis glycines ) in China [ 17 ]. Recently, there have been several reports on the detection of CLRDV in the USA: Arkansas [ 18 ], Alabama [ 19 ], Florida [ 20 ], Georgia [ 21 ], Kansas [ 22 ], Louisiana [ 23 ], Mississippi [ 24 ], North Carolina [ 25 ], Oklahoma [ 26 ], South Carolina [ 27 ] and Texas [ 28 ]. Since the first report of CLRDV, it has been detected in all the major cotton-growing counties in Georgia with 0–30% of disease incidence.…”

Section: Introductionmentioning

confidence: 99%

Genome analysis of cotton leafroll dwarf virus reveals variability in the silencing suppressor protein, genotypes and genomic recombinants in the USA

et al. 2021

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Cotton leafroll dwarf virus (CLRDV) is an emerging virus in cotton production in Georgia and several other Southeastern states in the USA. To better understand the genetic diversity of the virus population, the near complete genome sequences of six isolates from Georgia and one from Alabama were determined. The isolates sequenced were 5,866 nucleotides with seven open reading frames (ORFs). The isolates from Georgia were >94% identical with other isolates from the USA and South America. In the silencing suppressor protein (P0), at amino acid position 72, the isolates from Georgia and Alabama had a valine (V), similar to resistant-breaking ‘atypical’ genotypes in South America, while the Texas isolate had isoleucine (I), similar to the more aggressive ‘typical’ genotypes of CLRDV. At position 120, arginine (R) is unique to Georgia and China isolates, but absent in Alabama, Texas and South American isolates. Ten potential recombinant events were detected in the isolates sequenced. An increased understanding of CLRDV population structure and genetic diversity will help develop management strategies for CLRDV in the USA cotton belt.

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Section: Introductionmentioning

confidence: 99%

Genome analysis of cotton leafroll dwarf virus reveals variability in the silencing suppressor protein, genotypes and genomic recombinants in the USA

et al. 2021

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“…Further investigations revealed the association of an aphid‐transmitted RNA virus with symptomatic plants. Partial gene sequences of the virus identified as cotton leafroll dwarf virus, the same virus associated with a disease of cotton commonly known as “cotton blue disease” prevalent in South American and Asian countries (Avelar et al., 2019).…”

Section: Figurementioning

confidence: 99%

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

2021

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Features I n 2017, symptoms of leaf crinkling, downward curling, and deformation resembling virus-like diseases were observed in Alabama. Since there was a high incidence of whitefly in the fields where the symptoms were observed, they were tested for the presence of whitefly-transmitted viruses; however, none were detected. In 2017, cultivated cotton in Alabama was affected with an estimated economic loss of $19 million. Further investigations revealed the association of an aphid-transmitted RNA virus with symptomatic plants. Partial gene sequences of the virus identified as cotton leafroll dwarf virus, the same virus associated with a disease of cotton commonly known as "cotton blue disease" prevalent in South American and Asian countries (Avelar et al., 2019). In late 2018, extensive surveys were carried out, and the presence of the virus was confirmed from 23 counties in AL and 14 counties in GA (Figure 1). The virus's presence was also confirmed from other cotton-growing regions in the Southeast,

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“…Cotton leafroll dwarf virus (CLRDV), a phloem-limited virus, is associated with the emerging cotton leafroll dwarf disease (CLRDD) in the United States. It was first reported from Alabama in 2019 ( 2 ) and subsequently from the major cotton-growing regions in the United States, including Florida ( 3 ), Georgia ( 4 ), Louisiana ( 5 ), Mississippi ( 6 ), South Carolina ( 7 ), and Texas ( 8 ). Symptoms of the disease include reddening of the leaves and petioles and drooling, crinkling, and deformation of the leaves ( Fig.…”

Section: Announcementmentioning

confidence: 99%