110 



SEVENTEENTH REPORT. 



TABLE XVII (b). 



SECOND SET. 



The average germination in this case Avas slightly over 1%, 

 showing that this wonld effectually kill the spores of the fungus if 

 it did not injure the plant too severely at the same time. 



There was little difference in amount of germination between the 

 two dilutions and if one were used, the .6% would be as valuable 

 as the other. 



This spray is so soluble in water however, that some other in- 

 gredient would have to be added to give it more adhesiveness, since 

 otherwise it would wash off in the first light rain or in heavy dews. 



CHECKS. 



A set of seven check slides were used for each series of spray tests 

 conducted. The spores were geraiinated in distilled water on clean 

 cover glasses and a careful count made to determine the actual 

 average germination. 



TABLE XVIII. 



CHECK. 



Average germination of check — 92%. 



SECOND SET OF TESTS. 



Average germination of check — 85%. 



