177 



Muscamone plus Lure'em II attractant caught 3 times as many females as 

 Golden Malrin with Muscamone. 



Burroughs Wellcome bait. The bait submitted by Burroughs Wellcome 

 was Atroban (BW 21Z) 0.25% sugar bait. Golden Malrin with Muscamone 

 was used as a standard. These two baits were subjected to knockdown, 

 residual, attractancy, and field tests. The amount of each bait used 

 per replication was 5 g- 



Knockdown test. Both baits required the same amount of time to 

 produce mortality rates of 100% (Table kS) . Atroban took much longer 

 to actually kill flies than Golden Malrin with Muscamone, but after 

 60 min, flies exposed to Atroban were completely incapacitated. However, 

 criterion for death was total lack of movement, and flies could not be 

 considered dead until all movement ceased. 



Residual test. Results are shown in Table A6. After 6 weeks of 

 testing, Atroban and Golden Malrin with Muscamone baits were producing 

 mortality rates of 87.5 and 100.0% respectively. Mortality was still 

 occurring in the manner described in the knockdown test. 



Attractiveness test. There were no dead flies in the Atroban bait 

 station (Table k7) . This indicates that Atroban was either unattractive 

 to house flies or, due to the slow killing action of Atroban, flies died 

 after leaving the bait station. 



There were 25 dead flies in the Golden Malrin with Muscamone bait 

 station. 



Field test. Results are shewn in Table ^8. No flies were found 

 in the Atroban bait stations, but a mean of 12.5 flies were found in 

 the Golden Malrin with Muscamone bait stations. The ability of Atroban 



