120 FUMIGATION METHODS 



room is the same as if Jhe entire enclosure was filled ; 

 therefore, the cost would be somewhat increased. 



Small room a necessity. Whatever may be the 

 size of the nursery, a small room, say 4x5x7 feet, is 

 a necessity. Very often a small order or a few trees 

 to complete a big order are needed quickly. It would 

 be poor economy to use eighteen ounces of cyanide, 

 costing about forty cents, to fumigate a handful of 

 trees in a large room, when one ounce, costing less than 

 two and one-half cents, in a small room would answer 

 the same purpose. It is not desirable, in most cases, 

 to mix up small orders with car-load lots, and in most 

 nurseries a small room will be found in almost con- 

 stant use. The kind, shape, size, and location of the 

 fumigating house rests entirely with the individual, 

 and he must be the judge as to what is best suited for 

 his purposes. One thing must be remembered at all 

 times, whatever may be constructed, and that is, it 

 must be gas-proof. 



Preparation of trees. The house having been con- 

 structed, the next step is the proper preparation of the 

 trees for treatment. In the first place, care should be 

 taken that the trees are thoroughly matured and dor- 

 mant before they are dug and passed into the fumi- 

 gating house. Nurserymen should heed carefully the 

 cautions cited in Chapter III. Well-matured nursery 

 stock should be dug in the customary way, tied in 

 loose bundles, brought to the fumigatorium, and piled 

 loosely, not packed, upon the floor, with the roots 

 toward the walls and tops overlapping. The trees 

 should be as dry as possible. They may be damp or 



