18 



FAEMEKS BULLETIN- 846. 



the aiDplication of steam the principal requisite is to see that the 

 tobacco does not become too Avet. The temperature should not be too 

 high or the steaming be long continued. 



In rooms where cigars or manufactured tobaccos are packed a 

 very few beetles are capable of doing a great deal of damage by- 

 depositing eggs on the finished product. In many cases the process 

 of manufacture has sterilized the tobacco thoroughly, and precau- 

 tions to keep the beetles away during the tune it is handled and 

 packed will prevent damage to the product later. The windows of 

 packing rooms should be examined daily and the adults destroyed by 

 brushing them onto sticky fly paper, or by other means. The adults 

 are readily attracted to hands of leaf tobacco suspended in the rooms 

 and may be collected in this way. The leaf tobacco used for this 

 purpose should be heated or fumigated once each week in order to 

 destroy the eggs before they have time to hatch. The adults are 

 attracted toward the light, and an effective means of trapping con- 

 sists of inclosing electric lights in sticky fly paper. (See fig. 7.) 

 Sheets of fly paper 

 spread on the window 

 sills also were found to 

 destroy many beetles. 

 The adults fly more 

 readily to blue or violet 

 light than to red or 

 orange. Color screens, 

 however, cut down the 

 intensity of a light. 

 Ordinary electric-light 

 bulbs of clear glass, of 

 the improved and ni- 

 trogen-filled types, 

 which transmit light 

 rich in rays of short 

 wave lengths, are well 

 adapted for use as 

 sources of light in con- 

 nection with trapping. 



FUMIGATION. 



Fumigation has been 

 in general use for 

 many years as a method ' 'aauu«' Johc''lXlJu''bcJti!^iu 'tobacco' wlirchoul 



