INJURIOUS INSECTS OF 1904. 



23 



Preventive Measures. 



Cleanliness: 



Because a mill is clean or new is no reason why the moth can- 

 not be introduced, if sacks containing eggs or larvae, or second- 

 hand machinery from an infested mill are allowed to enter. At 

 the same time, scrupulous cleanliness has much to do with im- 

 munity, for eggs and larvae are dislodged by processes involved in 

 the term, and not allowed to develop. Every mill, it would seem, 

 should, and many do, have cleaners or sweepers, whose sole duty 



Fig. 10. — Flour matted together by web spun by larvae, one-half natural size. — Lugger. 



it is to see that every floor and all machinery, purifiers, spouts and 

 elevators are kept clean. Naturally such an employe or employes 

 should have some knowledge of insects found in flourinsr mills. 



Fumigation House: 



The writer is convinced, from talking with millers who have 

 had experience with this pest, that the chief source of contagion 

 lies in receiving into the mill returned sacks, and also second-hand 

 machinery from an infested mill, which may harbor the eggs or 



