Mushroom Diseases 165 



while they are being fumigated since formaldehyde 

 gas explodes upon coming in contact with fire. Mush- 

 room houses thus treated may be thoroughly rid of 

 the Mycogone disease, but care must be taken to 

 prevent reinfection. 



It is hardly necessary to add that all tools and 

 wagons which were used in connection with the in- 

 fected houses should be disinfected before being used 

 again. All such tools and vehicles should be washed 

 in a solution of one pint of formaldehyde in twenty 

 gallons of water. Throughout the process the oper- 

 ator must exercise extreme care not to inhale any of 

 the poisonous formaldehyde fumes. 



