MUSHROOM ENEMIES 



the permanganate when this is dropped in. 

 With everything in readiness the operators 

 begin farthest from the exit and quickly 

 and successively drop the bags of perman- 

 ganate into the formalin, leaving the build- 

 ing before the fumes can cause discomfort 

 to the eyes. A vigorous action is set up 

 w^hen these ingredients come together, so 

 that the material boils over the sides of the 

 vessel if the latter is small. 



Keep the house closed for at least twenty- 

 four hours, then open all windows, ventila- 

 tors and doors from the outside and let the 

 house air and dry out. Be careful that no 

 lighted lamp comes near the house during 

 the fumigation, for while the liquid form- 

 alin is non-explosive, the gas in a confined 

 state is. 



Fumigation by burning sulphur is also 

 effective against both insects and fungi, and 

 has been used to fumigate both the houses 

 and the compost. Two ounces of the pow- 

 dered sulphur for each i,ooo cubic feet of 

 space are required. 



141 



