FLORIDA STATE HORTICULTURAL SOCIETY 
203 
every larva that it touches, and greatly 
reduces the quantity of flies in the fol¬ 
lowing brood. 
With the coming of the rainy season, 
and several times during that period, 
fungous parasites of white fly are distrib¬ 
uted through the trees by means of 
spraying the trees with water in which 
fungous-bearing leaves have been soaked 
until the water has become charged with 
the fungous spores. The rainy season with 
its warm, moist atmosphere is conducive 
to the rapid development of the fungous 
parasites upon the larvae of the white 
fly and the increase of the fly is greatly 
checked. 
Wherever the insecticides and fun¬ 
gi have gained the mastery over the 
fly so that little or no sooty mould is 
seen on leaves and fruit in the fall of the 
year, any further spraying before the 
following spring is hardly necessary, but 
should the sooty mould appear in quan¬ 
tity, it is advisable to spray the trees in 
the fall, following the disappearance of 
the last brood of adult flies with a miscible 
oil solution in order to remove the sooty 
mould from leaves and fruit, and such 
spraying will also destroy such larva as 
it touches. 
This double method—spraying with 
insecticide and fungus—has apparently 
given excellent results over a very large 
portion of the white fly infected area, 
and seems to be the most economical 
method as measured by results. 
SCALE. 
During the summer of 1912 an appa¬ 
rent decided increase of the common 
scale insects of citrus were noted in sev¬ 
eral widely separated sections, but short¬ 
ly the fungous parasites of the scale were 
noticed in abundance attacking the scale, 
so that comparatively little loss of limbs, 
due to scale, was noticed. Observations 
this spring seem to indicate that a very 
large per cent, of the scale insects have 
been destroyed by their fungous parasites, 
and they now appear to be on the de¬ 
cline. Instances are known where scale 
infection has been exceedingly severe, 
and where the fungous parasites have not 
put in their appearance. Such instances 
usually occur on young trees planted in 
new localities that have not been set out 
more than a year, and frequently seem 
to indicate that the scale had been 
brought in with the nursery stock. 
Where scale infection is severe on 
young trees the growers find it advisable 
to scrub the trees. Spraying with some 
scalicide is resorted to on larger trees, 
and is usually effective, especially after 
a second application. 
SIX SPOTTED MITE, OR RED SPIDER. 
These minute pests which attack the 
under side of the leaves, usually along 
the center vein, and cause yellow spots 
to show through the upper side of the 
leaves, and also cause the dropping of 
leaves and young fruits whenever they 
propagate in sufficient numbers, do not 
seem to have made themselves felt this 
spring, except in a few localities where 
there has been a lack of rain. They are 
easily destroyed by spraying with a sul¬ 
phur solution. 
PURPLE MITES. 
These attack the upper side of leaves 
and are also frequently the cause of 
