Light Leaf Spot of Brassicas

Cylindrosporium concentricum

Description:

Silvery spots that become pale and diffuse with time and develop concentric rings of white to pale pink dots on a darker background.
Dark brown patches often with a lighter centre occur on petioles and Cauliflower heads.

Species Affected:

Brassicas.
Cauliflowers are very susceptible.

Biology:

Favoured by cool wet conditions.
Survives on crop residues.
Spread by wind and rain splash.

Life Cycle:

Origin and History:

Distribution:

Significance:

Management and Control:

Destroy crop residues.
Allow 3 years between Brassica crops.

Related and Similar Species:

References:

1292

Acknowledgments:

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