Augusta Disease of Flowering bulbs

Disease Information

Augusta Disease

Symptoms and damage

The Augusta disease is caused by the tobacco necrosis virus, which is transferred to the roots by the swarm cells of the fungus Olpidiumbrassicae. This is particularly encouraged by soil temperatures above 9°C. Infected plants do not necessarily show symptoms. The disease may suddenly appear when the plants are planted out during frost. Augusta disease is most common in tulips that are planted early at high temperatures after storage on a standing ground.

Management

Use fresh planting soil, although this is not always sufficient since the virus can survive on other plants and weeds. When using soil suspected of being diseased, do not plant the bulbs until the ambient temperature has dropped to below 9°C.

 



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