drinking water of hens, bioassayed manure produced 100% fly mortality. 

 Methoprene sand granules topically applied to manure gave house Fly 

 larval control of greater than 90% for 3 days post-treatment in bio- 

 assayed manure samples. 



Ophyra aenescens (Wied.), the black dump fly, was reared in the 

 laboratory and the larvae were proven to be predators of house fly 

 larvae. In the field, 0. aenesaens adults were considered pestiferous, 

 and their use as a biocontrol agent is not recommended at this time. 



In laboratory competition studies, Hermetia illuaens (!_.), an 

 assumed biocontrol agent, did not prevent house fly larvae from reaching 

 maturity when the two species were reared in the same container. In 

 the field, a situation occurred where larvae of H. Ulucens and M. 

 domestiaa were living in the same manure pack, but in different strata. 



Light traps, baits, and residual sprays were evaluated for their 

 ability to effectively reduce adult house fly populations. Light traps 

 were generally ineffective, but baits gave good results. In laboratory 

 studies, a bait consisting of dichlorvos and ronnel had the fastest 

 knockdown, killing all flies in 10 minutes. A methomyl bait had the 



longest residual and was killing at a rate higher than 25'o after a 



TM 

 6-week testing period. A Bomyl bait with Lure'em II ' attractant 



killed a significantly greater number of flies than all baits tested. 



A permethrin bait was unattractive to flies in the field even though 



its fly killing ability was demonstrated in the laboratory. When 



ICI 143, BW 21 Z , and SD 43775 synthetic pyrethroid compounds were 



applied as a residual treatment to wooden panels hung in poultry houses, 



ail compounds produced 100% fly mortality 121 days post-treatment. 



xv i 



