FLORIDA STATE HORTICULTURAL SOCIETY 
39 
and if this rubbish has been burned or 
plowed under a very great source of in¬ 
fection has been eliminated. However, 
some of the fungus has remained in the 
infected terminal branches, and as spores 
on the surface of the bark, which may be¬ 
come a source for infecting the new 
growth. This will have to be taken care 
of by pruning out the dead wood and by 
the use of fungicides. 
In many cases where trees were badly 
affected with the disease, the new growth 
that has put out since the freeze will be 
found comparativly free from Scab. This 
does not indicate a complete absence of 
the fungus, but rather the effect of the 
dry conditions under which such growth 
has developed. In such cases the fungus 
may remain quiescent or dormant until 
the rainy season and then attack a later 
flush of growth or any fruits that may 
develop from a June bloom. If a sufficient 
amount of June blossoms develop and it 
is desired to save the fruit it will be ad¬ 
visable to protect it through the danger 
period with some fungicide. This will 
apply particularly to those groves where 
scab has been troublesome in the past. 
Probably three sprayings will be sufficient, 
made at intervals of three weeks apart. 
The first should be applied about the mid¬ 
dle of the blooming period, using the 
Bordeaux Mixture of 3-3-50 strength. 
The Ammoniacal Solution of Copper Car¬ 
bonate may be substituted for the Bor¬ 
deaux Mixture if it is so desired. The 
probable increase in scale insects must 
also be kept in mind and when these are 
observed to become numerous a contact 
insecticide will be necessary. 
In seasons past, Citrus Scab has caused 
much injury to the foliage of young 
grapefruit trees, those that have not yet 
come into bearing and those of more re¬ 
cent planting. Where such trees have been 
completely defoliated and all dead twigs 
have been removed the disease may be 
practically eradicated. However, if the 
new foliage shows evidence of scab it 
will be well worth the efforts to eradicate 
the diseases from such groves. This can 
probably be accomplished by thorough 
spraying throughout the season. An ap¬ 
plication of Bordeaux Mixture of 3-3-50 
strength, once a month would be advisa¬ 
ble in order to protect the new growth that 
puts out. During the winter season all 
foliage showing infection should be re¬ 
moved and destroyed. Another thorough 
application of Bordeaux Mixture would 
be advisable before the new growth puts 
out in the spring. 
MELANOSE. 
(Phomopsis citri Fawcett.) 
Melanose is another fungus disease that 
may cause serious trouble during the sea¬ 
son. It is probably more widely distri¬ 
buted than any other citrus disease and it 
is responsible for most of the unsightly 
fruit that is grown in the State. The dis¬ 
ease is found on all varieties of citrus of 
commercial importance, and it may be eas¬ 
ily recognized by the characteristic mark¬ 
ing produced on the surfaces of the parts 
affected. Melanose is too well known to 
need further description. 
The disease causes the greatest loss 
through injury to citrus fruits. While 
this injury is entirely superficial and does 
not affect the quality of such fruits, it 
