7O FUMIGATION METHODS 



forward, allowing the gas to escape before the appara- 

 tus is transferred from ne tree to another. 



With an equipment of fifteen fumigators of this 

 type three hundred to four hundred trees can be cov- 

 ered in a day at a cost, including labor and chemicals, 



FIG. 40 PLACING THE CHEMICALS UNDER FUM1GATOR 



of about six cents per tree. For an outfit of this char- 

 acter in mountain orchards, where the ground is rough, 

 ten men are necessary to manipulate it to best advan- 

 tage. Three men handle the boxes, as shown in Fig. 

 39. It also requires three individuals to shovel the 

 earth around the base of the f umigator, as seen in Fig. 



