Table 2. Modified Ko and Hora medium (Hennis et al. 1978, Ko & Hora 1971, Castro et al. 1988).
 

Components Active ingredient (g)  
     
K2HPO4 1  
MgSO4.7H2O 0.5  
KCl 0.5  
FeSO4. 7H2 0.01  
NaNO2 0.2  
chloramphenicol 0.05  
agar 20  
destiled water 1000  
     
After sterilization in autoclave at 121oC/20 min, wait until the medium cool down to 50oC, then add: 
Components Active ingredient (g) Comercial product (g)
galic acid 0.4  
streptomycin 0.05  
metalaxyl (Ridomil 2E: 25%) 0.0633 0.2532
prochloraz (Prochloraz 38.1%) 0.005 0.0131

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