​​​CLRDV: What We Know, and What We Don’t

February 2020 | 22 min., 21 sec.
by Tom Allen
Mississippi State University

Audio IconSummary Webcast IconStudy Guide IconSlide Deck Icon​​​



​Cotton leafroll dwarf virus (CLRDV) in cotton produces a new disease: cotton leafroll dwarf disease (CLRDD). CLRDD was initially reported from Alabama in 2007, and since then, it has been observed in several states across the southern United States, including Mississippi. This presentation provides field-level practitioners with information to aid them in observationally diagnosing plants to determine if they have CLRDD and knowing where to submit samples for laboratory analysis to confirm the presence of the virus.

About the Presenter

Tom AllenTom Allen received his BS in biology from Indiana University in Bloomington in 1994. He received MS and PhD degrees from Auburn University in forestry and plant pathology in 1999 and 2003, respectively. After graduating, he was a postdoctoral research associate with The University of Georgia at Griffin (2003–2005), where he worked on yeasts present in the phylloplane of turfgrass as potential biocontrol agents with Dr. James Buck and Dr. Lee Burpee. In 2005, Allen moved to Amarillo, Texas, and joined Dr. Charlie Bush’s research program as an assistant research scientist with Texas A&M University in Amarillo–Bushland (2005–2007). Allen worked exclusively on Karnal bunt of wheat in wheat fields around Phoenix, Arizona. In 2007, he joined the faculty at Mississippi State University at the Delta Research and Extension Center in Stoneville as an extension plant pathologist for the major row crops grown in the Mississippi Delta, including corn, cotton, grain sorghum, rice, soybean, and wheat. His appointment changed in 2008 and is currently 80% extension and 20% research. He has been a member of APS and the Southern Division of APS since 2000. He has also been actively involved in the Mississippi Association of Plant Pathologists and Nematologists, Southern Soybean Disease Workers, and several regional projects, including NCERA-208 (response to emerging threat: soybean rust), NCERA-212 (soybean diseases), the predecessors of NCERA-137 (soybean diseases), and NCERA-184 (management of small grain diseases). Allen has been active in bacterial blight of cotton research since 2011 in addition to working with target spot as well as Cotton leafroll dwarf virus research efforts in Mississippi.​

Contact Information:
Email: tallen@drec.msstate.edu


In 2020, Grow webcasts had more than 110,000 views. Help support our mission to provide comprehensive high-quality, science-based resources to and for plant health researchers and practitioners at no cost.

PDMR submission guidelines and schedule information are available online.


Plant Health Progress is a peer-reviewed multidiciplinary, online journal of applied plant health.