Citrus Insect and Disease Conditions—General 
Summary and Observations 
J. A. Stevens. 
WHITE FLY. 
It is the impression of a great many 
growers that the white fly is on the de¬ 
cline. Climatic conditions during the past 
ten or twelve months, lots of rain, 
coupled with warm weather and the mild 
winter seem to have aided in the develop¬ 
ment of the fungous enemies of the white- 
fly to such an extent as to enable them to 
gain the mastery for the time being, at 
least. 
Along the border land of white fly in¬ 
fection the fly is still found encroaching 
on the parts heretofore uninfected. 
Quite a number of growers have re¬ 
ported finding the white fly in their 
groves this spring, which have not been 
infected up to this time. In most cases 
the growers are alive to the situation, 
and are taking steps to spray their trees 
with some good insecticide or to in¬ 
troduce the fungus enemies of white 
fly. In rare instances, however, an indi¬ 
vidual grower has been heard to re¬ 
mark that he believes the white fly is 
dying out, and that it will not be worth 
while to bother with spraying, or that 
the fungus will spread of itself and wipe 
out the white fly. Fortunately, growers 
with such views are very much in the 
minority, and it is needless to add are 
not progressive enough to be members 
of the Horticultural Society. 
Observations made throughout most 
of the white fly infected sections of the 
State bear out the conclusion that a combi¬ 
nation method of both spraying with an 
insecticide and the distribution of fungus 
parasites give better results in control¬ 
ling white fly than where either one meth¬ 
od is employed without the other. 
Those who have employed the double 
method with success, begin by spraying 
with a suitable insecticide in the spring 
soon after the first brood of adult flies 
have disappeared from the wing. The 
exact time when such condition exists 
varies slightly from year to year accor¬ 
ding to climatic conditions, and is slight¬ 
ly different with different latitudes. 
There is also some little difference as to 
time for spraying, between the different 
species of white fly. When the first 
swarm of flies appear in the spring, the 
grower observes them closely, and as 
soon as they are noticed to diminish in 
numbers, a date is set about two weeks 
ahead, at which time he is to begin 
spraying. When the spraying is begun, 
great care is exercised in an effort to 
wet thoroughly the underside of every 
leaf. The spray destroys practically 
