3U8 Repokt of the Departmeixt of Entomology of the 



in sotting, tlicse bows furnished approximately tlie same amount 

 of space for each tree, no matter what the size and shape, thus 

 making it unnecessary to calculate the amount of chemicals 

 that must be used for each, and at the same time prevented 

 breaking branches and rubbing the buds from them. The extra 

 labor of handling combined with their expense would forbid their 

 use except in special cases. The small gain in form, and the 

 slight advantage acquired by their use for getting a tent on and 

 off a tree was too small to be considered. They could not be 

 used on frozen ground as it was uecessary to sink them into the 

 ground one and one-half to two feet. 



Tents made over thirty feet in diameter require special ap- 

 paratus for handling, which adds to the expense of the outfit. 

 In addition large tents increase rapidly in cost compared to 

 size. Forty-foot tents cost between $45 and |50, when made to 

 order. 



BOX FUMIGATORS. 



PREVIOUSLY described FORMS. 



One style of box fumigator, with the method of using and its 

 advantages, has been described by V. H. Lowe in Bui. No. 181 

 of this Station, hence need not be described at this time. 



The only other form of covering for orchard fumigation that 

 has been described and is being used at present time, which is 

 not simply a variation of the octagonal tent, is the Emory fumi- 

 gator designed and described by Prof. W. G. Johnson.^ This a 

 half-box, half-tent affair for which it is just as difficult to esti- 

 mate cubic contents as for a tent; furthermore it is more un- 

 wieldly than a tent. 



At first Johnson^ claimed that his fumigator could be built 

 for $12. An attempt was made in 1899 to purchase a set of 

 these fumigators. The price asked was |35 each. In a later 

 publication^ Johnson puts the cost of construction at |30 apiece. 



^U. S. Dept. Agr. Div. Ent. Bui. No. 20, n. s., pp. 43^5, 1809. 



"1. c. 



"Ritral Neic-Yorker, Jan. 20, 19()0. 



