440 Brooks : The Fruit Spot of apples 



are given in the first of the tables below. The data were obtained 

 by actual count of the apples at harvest time. 



Only one bearing Baldwin tree was convenient to the labora- 

 tory. Inoculation experiments similar to those described above 

 were made on the limbs of this tree. No sugar solution was used, 

 however, and the spores were applied to the individual apple by 

 means of an atomizer. Some half-dozen limbs bearing from six to 

 twelve apples each were treated at a time. The limbs were selected 

 from different portions of the tree so as to eliminate the factors of 

 light and moisture as far as possible. Only one set of limbs was 

 sprayed more than once and this was treated twice a week through- 

 out the season. The sprayings were all made between four 

 six o'clock in the afternoon. The sprayed apples were not cov- 

 ered or protected in any way. Although the tree was large it is 

 readily seen that plenty of opportunity must have been given 

 the spores to be carried by the wind from the inoculated apples to 

 others near them. The results obtained from this experiment are 

 given in the second table below. 



and 



for 



Trees sprayed between 



July 5 and July 27 



July 27 and August 10 

 August 10 and September 1 2 

 Checks 



Limbs sprayed between 



July 2 and July 15 

 July 15 and July 31 

 July 3 1 and August 15 

 July 2 and August 1 5 

 Checks 



1 Percentage of picked appl* 



spotted 



70.4 



43*5 

 38.9 



33-8 



Average number of sp<* 

 per apple 



15 



28 

 9 



The results varied greatly with the individual limb and t«*- 

 It was intended to compare the data obtained with the wea 

 records but it was found at the close of the season that these w 

 in an unsatisfactory condition and could not be relied upon. 



Inoculation experiments similar to the above were carrie ^ 

 in the summer of 1908 and results equally as striking were n 



tained. 



J 



matte 



in that month were far more effective than those made 



