0.050- 



> 



d 0.195 



OQ 



O 



o 



LU 



cc 

 O 



X 



o 



cc 



H 

 O 

 LLI 



_1 

 LU 



> 



UJ 

 CC 



e 



■ . 48-Hour LC50, 

 Mo/ use species ^ ,j ^^ 



1 L. stagnalis 



2 P. corneus 



0.5 

 50.0 



Figure 1. Acetychol inesterase in nervous ganglia of molluscs 

 with varying resistance to Dylox. 



1 - Limnaea stagnalis , LC50 " ^-^ "^S/l 48-hrs. exposure, 



2 - Planorbis corneus , LC50 - 50 mg/1 48-hrs. exposure. 



88 



