August, '11] 



JOURNAL OF ECONOMIC ENTOMOLOGY 



Plate 15 



i 



t ._ 



Dose 



44 

 4^ 

 40 

 38 

 36 

 54 

 32. 

 30 

 28 

 26 

 24 



20 

 18 



Leaka?re 



mmmm 



25 .S 



Fumigation dosage for l)la(^k scale based on size of tent and leakage of gas 



