DAYLIGHT FUMIGATION, COST OF APPLICATION 89 



fumigating could be done on cool, cloudy days with 

 comparative safety. But in Riverside County, where 

 the fumigation is almost entirely for red scale, where a 

 much greater amount of cyanide is required, and 

 where it is necessary to do the work during the warm 

 weather, it would certainly be a very unsafe thing to 



FIG. 45 CHARGING A CALIFORNIA HOO.P TENT 



do. And the orchardist who attempts it will probably 

 be reminded of this fact by having his trees damaged. ' ' 

 The cost of or chard fumigation depends upon the loca- 

 tion of the orchard, the kind and size of the tree, and, 

 to a certain extent, upon the prevailing weather condi- 

 tions under which the work is done. The actual cost of 

 fumigation is not necessarily very great after the out- 

 fit is once secured. With a small number of Emory 

 fumigators, or sheet tents, most fruit growers can apply 



