480 REPORT OF THE HORTICULTURAL DEPARTMENT OF THE 
Resistance to disease.— The amounts of leaf blight and mildew 
were noted from time to time during the growing season. The 
extent of these injuries is often largely determined by soil and air 
drainage and by the frequency and duration of rainfall, and varies 
widely in different years. Under similar conditions, however, there 
was considerable variation in the ability of different varieties to 
withstand attacks of fungi. These differences are recorded in the ~ 
description of varieties. J ifty-five varieties were wholly free from 
disease, fourteen varieties but slightly affected, and twenty varieties 
considerably injured, principally by leaf blight. 
Season of ripening.— In some localities the commercial value of 
a variety is largely determined by the time at which the fruit is 
ready to harvest. Some markets require early fruit while others 
find the late varieties most satisfactory. The terms early, midsea- 
son and late, as used in this bulletin, are relative, referring to com- 
parative time of ripening rather than to specific dates. The follow- 
ing table shows that seventeen varieties ripened early and only seven 
late, while a large majority, sixty-five in number, fruited in mid- 
season. 
EARLY SEASON. 
Advance Ernie Miss Boston 
Almo Excelsior Oaks Early 
Chipman Fairfield Pres. Roosevelt 
Colossus Florella Riehl No. 28 
Early Beauty Gill Saint Louis 
Ekey Golden Gate 
LATE SEASON. 
Blaine Prof. Fisher Rough Rider 
Columbia Quality Williams 
Nettie 
Productiveness.— During the ripening period the fruit was picked 
and weighed several times each week as occasion required. As the 
rows of the different varieties were not of the same length the total 
weight was reduced to the estimated yield per acre for comparison. 
No less than 12 plants of a variety were set, and in some cases the 
rows included roo or more plants. The results indicate wide 
ranges in productiveness, varying from 14,409 quarts per acre in the 
case of Arnouts to.622 quarts per acre with Stevens Late Champion. 
The latter variety, however, produced very few runners and the 
original plants might have been set much closer, which would have 
