A FUMIGATOR FOR SMALL ORCHARD TREES.* 



V. H. Lowe. 



INTRODUCTION. 



The fumi^ator described herein was planned at the Station for 

 use in a series of orchard fumigation experiments witli hydrocy- 

 anic acid gas. It has been carefully tested with such good results 

 that a brief description in bulletin form seems desirable. This 

 style of fumigator is intended for use with the smaller orchard 

 trees, such as peach, pear, plum and quince. Trees larger than 

 the dimensions of the fumigator can often be trimmed back suffi- 

 ciently to go under it without injury, 



DESCRIPTION OF FUMIGATOR.1 



CONSTRUCTION. 



A picture of the fumigator in position ready for use is shown 

 at Plate XLVI. The dimensions are 10x6x6 feet. The frame con- 

 sists of well-seasoned pine strips three inches wide and seven- 

 eighths inch thick, braced on three sides by double cross pieces of 

 the same thickness and one and one-fourth inches wide, midway 

 between the top and bottom, and short braces at the angles, as 

 shown at Plate XLII. The base is made of four-inch strips and 

 has but three sides, the fourth being omitted to avoid the neces- 

 sity of lifting the fumigator over the top of the tree before 

 putting it in place. To add to the rigidity of the base two strips 

 three by seven-eighths inches extend from the rear strip to the 



•Reprint of Bailletin No. 181. 



'Since writing the bulletin tlie author has been told, by Prof. W. G. 

 Johnson, that he has designed and used a similar fumigator. 



