
New York AGRICULTURAL EXPERIMENT STATION. 547 
of seed and uniform treatment was given to both. The crop was 
gathered as snap beans and a record of the yield was kept both 
by weight and by number of pods produced. In order to deter- 
mine accurately the severity of the disease the pods were classi- 
fied as follows: | 
a. Free from any appearance of disease. 
6 Slightly diseased. 
c. Badly diseased. 
d. Very badly diseased. 
Figures 6 and 7 from photographs will assist in giving an idea 
of this classification. The pods shown in Fig. 6 are from an 
untreated row. Those shown in Fig. 7 were picked at ihe same 
time from a corresponding row treated with Bordeaux mixture, 
and well illustrate the good effects of spraying. In each case the : 
plants came from diseased seed. Group No. 1 in each figure 
shows the amount free from disease; No. 2 shows those slightly 
diseased; No. 3 shows those badly diseased, and No. 4 shows 
those very badly diseased. 
_ ‘Five pickings were made, the last one September twenty-seventh. 
The records of the ‘season’s yield were then combined in one 
table. In order that this report might not be needlessly cumbered 
with tables, a somewhat arbitrary method was employed to 
find one numerical expression for the amount of injury from 
anthracnose in each case. To do ihis it was necessary to esti- 
mate the per cent. of injury represented by each one of the taree 
classes, “b,” “c,” and “d.” This was done, and, on conswt:tien 
with the two persons who assisted in assortiny, five per cent. was 
_adopted to express the amount of damage in class “0,” forty 
per cent. for class “c,’ and ninety per cent. for class “d.” If. 
the percentage of injury thus found is deducted from the total 
yield of each of these three classes and they are then combined 
with class “«,’* the result will state the yield for each experiment 
less the percentage of total damage to the pods from anthracnose. 
It is a difficult matter to express either in words or in figures 
the degree of damage to the crop from the disease. 'The above 
method was adopted because it includes in the record those pods 
which were too badly diseased to ripen seed. It will be secn at _ 
