187 



on the templates with four cages on each template and 10 flies per cage. 

 A cotton ball soaked in a sucrose solution was placed on top of each 

 cage as a food source. Mortality was recorded after 2k hr. Criterion 

 for death was total lack of movement. Control templates were processed 

 like the treated templates except that they were not sprayed with 

 permethr in. 



Testing continued at selected intervals until mortality dropped 

 below 50%. Between tests, templates were stored outside under the eaves 

 of the laboratory to simulate aging under field conditions. After each 

 use, cages were baked in an oven at 1A8.9 C for a 2^-hr period. 



Resul ts. Mortality on the tin templates dropped below 50% within 

 3 days (Table 51) and testing ceased after 8 days. Mortality on the 

 cement block templates never exceeded 50% and testing was also discon- 

 tinued after 8 days (Table 51). 



The breakdown of JFU 5021A was slower on wood (Table 51). Mortality 

 on the 0.005% template began to fluctuate 56 days post-treatment and 

 dropped below 50% 75 days post-treatment. As a check, the template was 

 tested again the following summer, but permethr in had broken down 

 (Table 51) and testing was discontinued. 



The 0.05% template continued to produce mortalities of 100% through 

 1976. When testing resumed in 1977, however, the mortality rate began 

 to fluctuate (Table 51). Mortality dropped below 50% on 25 August and 

 8 November, but was back to 77-3% by 5 December. The reasons for this 

 are not clear, but may be related to lower ambient testing temperature. 

 The mean mortality for the year was 65.8%. 



