MICHIGAN ACADEMY OF SCIENCE. 



107 



The average germination for the entire series was 91%, which 

 shows that this spray would be useless as a control for scab, there 

 being practically no control if any, since the checks showed 92% 



germination. 



TESTS WITH AMMONIACAL COPPKR CARBONATE. 



This is a fungicide that is much used where a non-staining com- 

 pound is sought, but has not so strong fungicidal properties as 

 Bordeaux mixture. 



The common formula used is as folloAvs: 



5 ounces Copper Carbonate 

 3 pints Ammonia 

 50 gallons of water. 



This is approximately equivalent to the mixture used in these 

 tests, which was made up in these proportions: 



1 gm. CuCOs 

 8 cc. Ammonia 

 1600 cc. water. Dissolve the copper carbonate 

 in ammonia and add water. 



The average germination for this set was 85%. 



SECOND SERIES. 



The average germination in this case was 79%, while the average 

 for both, series was 82%. This would not seem to indicate that 

 it was valuable as a fungicide as was noted before but in the case 

 of the two sets it was found that soon after germination the germ 



