white rust control

//I apologize for any cross-postings

Any suggestions for organic practices for control of white rust (Albugo
candida) in leafy brassicas? I know few or no materials are available for
'conventional' growers to control this disease. Thank-you for any leads,
suggestions. Hector. 

Hector Valenzuela
Horticulture, Univ. Hawaii at Manoa
3190 Maile Way No. 102
Honolulu, HI 96822-2279
fax 808-956-3894