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Symptoms and signs

TSWV infects over 650 plant species and causes significant economic damage to many agronomic and horticultural corps. Symptoms of tomato spotted wilt differ among hosts and can be variable in a single host species. Stunting is a common symptom of TSWV infection, and is generally more severe when young plants are infected (Figure 3). Chlorotic or necrotic rings form on the leaves of many infected hosts (Figure 4), and may also appear on the fruits of some hosts (Figure 1). Necrosis may develop in the foliage of some hosts, making diagnosis based on symptoms alone difficult (Figure 5). Although TSWV is not seed transmitted, it may cause the discoloration of seed produced on infected hosts (Figure 6). Hence, tomato spotted wilt may affect both the quantity and quality of plant products.

Figure 3	Figure 4
Figure 1	Figure 5
Figure 6