Description

Cotton leafroll dwarf virus (CLRDV) is a destructive viral pathogen that infects cotton (Gossypium hirsutum). This disease causes leaf curling, vein yellowing on younger leaves and reddening of the plant stalks, along with severe stunting of affected plants (Sharman et al., 2015). The single stranded RNA virus is the causal agent for cotton blue disease and is responsible for yield losses around the world.

Cotton leafroll dwarf virus is an aphid transmitted cotton disease that was first documented throughout the southeastern region of the U.S. Cotton Belt in 2018 (AL, MS, GA) (Avelar et al., 2018; Aboughanem-Sabanadzovic et al., 2019; Tabassum et al., 2019). Currently, very little is known about the yield or quality impacts of CLRDV in the United States.

NAGC has developed a quantitative PCR assay that identifies the presence of the viral pathogen, as well as quantifies viral loads in tested materials.

This project was funded in part by the National Predictive Modeling Tool Initiative

References

Aboughanem-Sabanadzovic, N., Allen, T. W., Wilkerson, T. H., Conner, K. N., Sikora, E. J., Nichols, R. L. & Sabanadzovic, S. 2019. First Report of Cotton Leafroll Dwarf Virus in Upland Cotton (Gossypium hirsutum) in Mississippi. Plant Disease, 103, 1798.

Avelar, S., Schrimsher, D. W., Lawrence, K. & Brown, J. K. 2018. First Report of Cotton leafroll dwarf virus Associated with Cotton Blue Disease Symptoms in Alabama. Plant Disease, 103, 592-592.

Sharman, M., Lapbanjob, S., Sebunruang, P., Belot, J. L., Galbieri, R., Giband, M. & Suassuna, N. 2015. First report of Cotton leafroll dwarf virus in Thailand using a species-specific PCR validated with isolates from Brazil. Australasian Plant Disease Notes, 10, 24.

Tabassum, A., Bag, S., Roberts, P., Suassuna, N., Chee, P., Whitaker, J. R., Conner, K. N., Brown, J., Nichols, R. L. & Kemerait, R. C. 2019. First Report of Cotton Leafroll Dwarf Virus Infecting Cotton in Georgia, U.S.A. Plant Disease, 103, 1803.