ANTHRACNOSE OF CUCURBITS. . Sa seco, 
in September. As may be noted in the accompanying diagram 
(fig. 14), this field occupied a decided westward slope, and the rows 
were parallel to the direction of the slope. Along the west side at 
the foot of the slope were grown the various cucurbits mentioned in 
the discussion of pathogenicity. While some anthracnose appeared 
among these earlier in the season, it was confined to a few well- 
defined centers. After the rains mentioned above, new even-aged 
infection of anthracnose was found on September’ 12 on all of the rows 
Fig. 14.—Diagram of field 1, Madison, Wis., 1916. The direction of the rows is indicated by broken lines, 
| theslope by the 4-foot contour intervals. Where not otherwise indicated the crop wascucumbers. The 
original centers of anthracnose noted on July 27 are shown by the circles. The location of the seedlings 
planted late in the summer is shown in the lower left corner. Water traps 5 to 8 areshown by trapezoids. 
of susceptible cucurbits, very evidently as a result of surface drainage 
from the diseased field above. 
Still more convincing evidence was furnished by rows of cucumber 
seedlings planted late in the season between the rows in field 2 and 
on the west edge of field 1 (fig. 14). On September 11 these seedlings 
in field 1 appeared healthy, while the next day practically all of them 
were thickly spotted with incipient anthracnose lesions, so numerous 
as to cause many leaves to curl. By the next day many seedlings 
were dying. Drainage channels from the field above led directly 
through these rows of seedlings. Very evidently these seedlings 
were so abundantly infected during the preceding rains that they 
were practically blighted outright by the numerous lesions that 
developed simultaneously. An added point of interest is that this 
