Tomato Spotted Wilt Virus (TSWV) of vinca

Disease Information

Tomato Spotted Wilt Virus (TSWV)

Symptoms and damage

This virus disease shows up occasionally in landscape plantings of vinca and many other herbaceous plants. TSWV is spread by tiny insects called thrips. Symptoms vary from host to host. On vinca, symptoms include black concentric ring spots or line patterns, yellowing, stunting and distortion.

Management

Inspect plants for virus symptoms prior to purchase. Remove all diseased plants from flower beds, as infected plants cannot be cured and can support spread of the disease. Thrips management hasn`t been shown to significantly slow the spread of TSWV. In addition, thrips are difficult to control because they often feed deep within flowers or flower buds, and two life stages, the eggs and the pupae, are unaffected by insecticides. Avoid planting vinca near vegetable gardens, as many vegetables are also susceptible. Controlling weeds is also essential because many weeds can harbor both thrips and the virus.

 



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