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Light Traps for Surveying Adult Fly Populations 



Each of two light traps at the tilling site caught different numbers 

 of the monitored fly species from month to month and presented two dif- 

 ferent pictures of monthly changes in fly popul at ion. numbers . Because 

 of such variation in catches, light traps are recommended for survey 

 work but are not considered consistent enough to accurately estimate fly 

 populations (Pickens et al., 1972). 



Driggers (1971) and Pickens et al . (1975) increased fly catches by 

 lowering traps from ceiling level to ground level. At the tilling site, 

 traps were hung at ceiling level because ground level traps would have 

 interfered with the rototiller and would have been covered with manure 

 as a result of the rototiller. 



The yellow trap consistently caught more flies than the black trap. 

 This was due to the differences in wave lengths emitted by the light 

 sources of the two traps. Although the traps themselves were two 

 different colors, it is doubtful that trap color influenced the fly 

 catch (Mitchel 1 et al . , 1975) . 



Although their influence on fly populations may be questionable, 

 light traps are looked upon favorably by some poultrymen. Light traps 

 provide results that the poultryman can see and hear all day long. 



Granular Baits for House Fly Control 



A combination of Kill 'em Fly Killer II (Bomyl) plus Lure'em II 

 attractant produced the best results in the field although laboratory 

 testing indicated Kill 'em Fly Killer II had a relatively long knockdown 

 period of ca . 4 hr. Kill 'em Fly Killer (Vapona + ronnel) had the 

 fastest knockdown, but the lowest fly catches of all baits tested with 



