What do I do if I find it?
Infected plants must be immediately removed, along with the surrounding soil, and burned.
White rot sclerotia persist in the soil for many years, surviving through cold winter temperatures. Ensure the implementation of biosecurity measures to prevent further spread.
For backyard gardeners, wash any soil from infected parts of the garden from their footwear and tools before moving to other areas of the property.
Report any suspect signs of white rot to the department’s Pest and Disease Information Service on freecall 1800 084 881 or by emailing info@agric.wa.gov.au.
Alternatively you can download the MyPestGuide reporting app or make an online report at mypestguide.agric.wa.gov.au.
How is it spread?
The little poppy seed growths on the base of infected allium bulbs are called ‘sclerotia’ and these are the means by which the disease spreads. They will drop off infected plants into soil, and will infect any new crops.
The disease can then be spread through the movement of infected planting material, infested soil, plant debris or water.
White rot sclerotia persist in the soil for many years, surviving through cold winter temperatures.