66 



CIRCULAR 9 7 



U. S. DEPARTMENT OF AGRICULTURE 



treated surfaces. Reinfestation is not likely to occur for many 

 months. 



Although sprays are usually recommended for bed bug control, 

 DDT dusts are also effective. Troops provided with DDT or MYL 

 louse powder can obtain protection by applying it to the bed, mat- 

 tress, and blankets. Owing to the slow action of DDT, complete 

 protection from annoj^ance may not be experienced the first night. 

 The MYL powder acts more quickly, although final results may not 

 be as good as with DDT. 



Figure 27. — Spraying a mattress for control of bed bugs. 



