TOMATO 293 
well developed the loss may be very slight. Early and 
general infection invariably seriously interferes with 
nutrition, and results in a light crop of small fruits in- 
ferior in quality. The most thorough, early and repeated 
spraying of the upper and under surfaces of the leaves 
with bordeaux mixture is regarded as fairly effective in 
preventing serious ravages of the mold. It is exceed- 
ingly important to avoid working among the plants when 
they are wet, in order to prevent the spread of the fungus. 
If the disease becomes well established, no kind or 
amount of spraying will prove effective. 
Fig. 93.—Blossom end rot of tomato. 
Blossom-end rot is familiar to all growers of green- 
house tomatoes. The characteristic appearance of the 
affected fruit is shown in Fig. 93. The Ohio and other 
experiment stations have studied the causes of point rot 
and the means of preventing it, and there seems to be 
