122 FUMIGATION METHODS 



water, together with a cup or glass for dipping, should 

 be kept close at hand. 



Cellars and cars. It is not desirable to attempt to 

 fumigate trees after they are packed in cellars or cars. 

 In some cases serious injury has been done when trees 

 were fumigated in freight-cars after being packed. 

 As a rule, the roots are so closely packed with moss 

 and other materials when put in cars it is difficult 

 for the gas to get to them. It is practically im- 

 possible to properly ventilate the car afterward, and 

 more or less gas is left. The only proper place to 

 treat trees is in the fumigatorium. 



Canvas over wagon. An enterprising nursery firm 

 in Utah uses a canvas sheet over a wagon loaded with 

 trees, in addition to the use of a house. They give the 

 following description of house and method of handling 

 tent: " For a number of years we used a small room 

 about 12x12 feet. Finding this too slow a process, 

 we put up a building 22 x 56 and 9 feet high. The 

 roof and entire building is made with two thicknesses 

 of i x 12 feet boards, with building paper between, 

 which makes it very tight. As this was rather large 

 for ordinary use, we made a partition, making the 

 smaller room 22 x 20. This latter room we use mostly 

 when we store our stock inside to be treated. 



<l We think, however, by far the better and more 

 economical method is to do the fumigating on the wagon 

 at the time stock is dug and hauled in. This is done 

 by using a canvas sufficiently large to cover the entire 

 load, with a few feet of margin, which should be spread 

 on the ground and weighted down to keep the fumes 



