56 
BULLETIN 1474, U. S. DEPARTMENT OF AGRICULTURE 
in early in June and resulted in a rather heavy infection. It is a 
noteworthy fact that the general melanose-infection outbreak was 
several weeks later than usual, owing doubtless to the absence of 
prolonged rainy periods in April or May. 
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Fig. 17. — Comparison of grading of fruit with respect to melanose blemish in 
sprayed and unsprayed grapefruit groves in 1924. Bordeaux-oil emulsion was 
used by the owners 
SECONDARY BENEFICIAL RESULTS FROM SPRAYING 
It has long been recognized that Bordeaux mixture or Bordeaux- 
oil emulsion has a marked beneficial effect upon citrus trees suffering 
from certain diseases of a noninfectious nature, such as die-back and 
the so-called "wither tip." In addition to controlling melanose. 
