Fusarium Wilt of Carnations

Fusarium oxysporum f.sp. dianthi

Description:

A fungal disease that causes yellowing and wilting of branches that gradually progresses until the plant dies. The stem shows staining of the vascular tissue if it is cut. In advanced cases the roots rot and the plants may be pale green to tan overall. The bark may also rot and fall off.

Species Affected:

Carnations.

Biology:

Favoured by warm weather.
The fungus may survive in the soil for a long time.
Most infections occur near ground level through damaged areas of the roots or stem or through cutting scars.
Spread in soil, on equipment and in drainage water.

Life Cycle:

Origin and History:

Distribution:

Significance:

Management and Control:

Fumigate soil if it has previously grown Carnations within the last 5-6 years.
Plant resistant varieties.
Plant disease free stock.
Rotate to resistant species.
Remove and destroy all plants as soon as they show symptoms. Don't spread disease while removing diseased plants.
Use pasteurised soil for root cuttings.
Apply fungicides.

Related and Similar Species:

References:

1291

Acknowledgments:

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