EPPO Global Database

EPPO Reporting Service no. 04 - 2000 Num. article: 2000/070

New host plants for impatiens necrotic spot and tomato spotted wilt tospoviruses

Tomato spotted wilt tospovirus (EPPO A2 quarantine pest) was found in 1998 on basil (Ocimum basilicum) in Louisiana, US. An outbreak of thrips was also observed at the same time. Symptoms consisted of ring spots, distortion and severe mosaic (Holcomb et al., 1999).

Impatiens necrotic spot tospovirus (EPPO A2 quarantine pest) was detected in field samples of peanut (Arachis hypogaea) collected in Texas and Georgia, US. Symptoms were similar to those caused by tomato spotted wilt tospovirus (yellowing, wilting of the plants, internal necrosis of taproot and crown, plant death). Pappu et al., 1999.

In 1998, severe impatiens necrotic spot (EPPO A2 quarantine pest) infections were found in various ornamental plants in Piemonte, northwestern Italy, associated with heavy infestations of Frankliniella occidentalis (EPPO A2 quarantine pest). The following new hosts were identified: Ageratum houstonianum, Cordyline terminalis, Dianthus chinensis, Episcia capreata, Godetia grandiflora, Maranta leuconeura, Peperomia obtusifolia, Scindapsus aureus, Torenia fournieri. Infected plants showed chlorotic, necrotic, concentric rings, necrosis of leaves and stems and reduced growth (Gotta et al., 1999 - Roggero et al., 1999).


Gotta, P.; Gallo, S.; Ciuffo, M.; Roggero, P.; Dellavalle, G.; Masenga, V.; Lisa, V. (199) ;Tospovirus infections in ornamental plants in Piedmont (Italy).
Informatore Fitopatologico, no. 12, 56-60.

Holcomb, G.E;; Valverde, R.A.; Sim, J.; Nuss, J. (1999) First report on natural occurrence of tomato spotted wilt tospovirus in basil (Ocimum basilicum).
Plant Disease, 83(10), p 966.

Pappu, S.S.; Black, M.C.; Pappu, H.R.; Brenneman, T.B.; Culbreath, A.L. Todd, J.W. (1999) First report of natural infection of peanut (groundnut) by impatiens necrotic spot tospovirus (Family Bunyaviridae).
Plant Disease, 83(10), p 966.

Roggero, P.; Ciuffo, M.; Dellavalle, G.; Gotta, P.; Gallo, S.; Peters, D. (1999) Additional ornamental species as hosts of impatiens necrotic spot tospovirus in Italy.
Plant Disease, 83(10), p 967.