Spotted Wilt Virus of Capsicums and Tomatoes

TSWV

Description:

A viral disease.

Broad Bean

Young leaves mottled, stems with brown streaks and death of the main shoot. Pods with black spots.

Capsicum

Leaves with yellow parallel lines or concentric rings. Fruit with yellow rings and blotches up to 10 mm wide that may not be apparent until the fruit ripens.

Calla Lily

Leaves with yellow spots or streaks parallel to the veins.

Chrysanthemum

Leaves with irregular wavy lines bordered by other lines. Leaves may go brown and die.

Dahlia

Leaves with irregular wavy lines bordered by other lines. Leaves may go brown and die. Stems streaked with brown or purple.

Potato

Brown, dead, angular spots on young leaves and brown zones and spot on older leaves. The shoots may show die back.

Tomato

It starts as small brown spots on young leaves that form bronze coloured spots or rings between the veins as leaves grow. Stems may have brown streaks. Young plants are often killed. Late infection may result tin fruit with circular blotches that ripens unevenly.

Species Affected:

Broad Bean, Calla Lily, Capsicums, Chrysanthemum, Dahlia, Iceland Poppy, Lettuce, Potato, Tomato and Zinnia.
Many weeds.

Biology:

Favoured by hot, dry weather
Carried between plants by Onion Thrip (Thrips tabaci).
Carried on rhizomes and tubers of infected plants.

Life Cycle:

Origin and History:

Distribution:

Significance:

Management and Control:

Control Thrips.
Control alternate hosts in crops and surrounding areas.
Remove and destroy infected plants.
Control weeds.

Related and Similar Species:

References:

1291

Acknowledgments:

Collated by HerbiGuide. Phone 08 98444064 or www.HerbiGuide.com.au for more information.