195 



Table 54. Concentrations of acaricides and total, per cent, and 

 corrected per cent mortality for each concentration 

 tested against northern fowl mites. 



Test Concentration 



Total 





Per cent 



Corrected 



(ppm) 



Mortal i ty 





Mortal i ty 



% Mortal i ty 





Pen i ck 



138: 



,TM 





10.00 



54/60 





90.00 



88.10 



8.00 



54/61 





88.52 



86.90 



6.00 



40/62 





64.52 



58.33 



it. 00 



38/61 





62.30 



54.76 



2.00 



25/60 





41.67 



30.95 



1 .00 



25/62 





40.32 



28.57 



Control 



10/61 





16.39 



— 



BW 21 Z 



4.25 44/60 73.33 70.99 



2.75 33/60 55.00 51.06 



1.75 26/60 43.33 38.36 



1.25 19/60 31.67 25.68 



1.00 15/60 25.00 18.43 



Control 5/62 8.06 



Shel 1 SD 43775 



10.00 51/60 85.00 82.74 



8.00 45/60 75.00 71.23 



6.00 40/60 66.67 61.64 



4.00 29/60 48.33 ^0.53 



2.00 21/60 35-00 25.19 



1.00 12/61 19.67 7.55 



Control 8/61 13.11 



