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Tomato spotted wilt virus (TSWV), a member of the Orthotospovirus genus, was first described in 1915 in Australia and later confirmed as the causal agent of spotted wilt disease in the 1930s. Its global emergence intensified in the 1980s and 1990s, driven largely by the spread of western flower thrips (Frankliniella occidentalis), a highly efficient vector. TSWV was first detected in North Carolina in 1988 and became widespread by 1997, with average incidence reaching 10–15% in the Coastal Plains and severe crop losses reported. In the southeastern U.S., the primary vector in tobacco is the tobacco thrips (F. fusca), which, along with the virus's ability to infect over 1,000 plant species, contributes to its persistent threat to diverse agricultural systems.
Black shank is an economically important disease of tobacco that threatens production in North Carolina. This factsheet provides information about the causal organism (Phytophthora nicotianae) and its management.
Brown spot is a disease of increasing importance in flue cured tobacco production.This disease is most severe on mature or otherwise injured tobacco.
Frogeye leaf spot disease on flue-cured tobacco is caused by the fungal pathogen, Cercospora nicotianae. This disease has historically been an issue for ripe tobacco, but has become more common over the last couple of years. The disease is found most commonly on lower, more mature leaves of the plant, but can also affect green tissues. Infections are not often severe enough to impact yield, but, under conducive environmental conditions, can cause severe damage to leaves.
Nematodes are an economically important pest for flue-cured tobacco production. Root knot nematode is particularly damaging due to the wide host range and number of species of root knot nematode found in North Carolina.
Target spot is a potentially devastating leaf spot disease in tobacco in North Carolina. This factsheet summarizes the signs and symptoms and offers treatment plans.
This factsheet shares the symptoms and control of Granville Wilt, a devastating disease of tobacco in North Carolina.
