[Arabidopsis] Powdery mildew in growth chambers

[vnunes from igc.gulbenkian.pt]

Hello,

For the first time we are having a contamination with powdery mildew  
in our growth chambers. Can you please give me some practical advices,  
based on your experience, that might be effective in dealing with this  
disease towards its prevention and erradication?

Thank you,
Vera Nunes
Instituto Gulbenkian de Ciência