FLORIDA STATE HORTICULTURAL SOCIETY. 
96 
Mr.-In spraying, how often dur¬ 
ing the season is it necessary to spray 
to get good results ? 
Dr. Morrill—Not less than three 
times a year. I would recommend two 
in the winter and one later on, about 
the middle of June. There are no two 
men who spray alike and good results 
are dependent upon thoroughness. 
The results from spraying would not 
be as satisfactory as by fumigation, 
but I believe, personally, that I could 
spray a grove three or four times 
a year and keep the white fly from 
smutting the fruit. The average or¬ 
ange grower has to depend on care¬ 
less hands to spray, and it is not done 
carefully and thoroughly, and half the 
good results are lost. . 
Mr. Mote—What do you think will 
control the rust mite? 
Dr. Morrill—To control the rust 
mite, you would have to add sulphur 
to the spray. 
Mr.-Did I understand you to say 
that one fumigation would equal the 
results of four sprayings ? 
Dr. Morrill—Yes, sir. The four 
sprayings in one season would not be 
as effective as one fumigation, and 
they would have to be repeated each 
year. Fumigation has been done so 
thoroughly that it was impossible to 
find a single white fly on more than 
two hundred trees, but absolute ex¬ 
termination should not be expected. 
Mr.—Can you fumigate during the 
summer months? 
Dr.Morrill—We fumigate very little 
in the summer time, but two or three 
weeks ago we fumigated some trees 
that were heavily laden with fruit, and 
while it seemed to cause quite a large 
percentage of the fruit to drop, we 
found that surrounding trees contin¬ 
ued to shed their fruit, and altogether 
the fumigated trees have not shed as 
much fruit as the unfumigated trees. 
However, it is not desirable to fumi¬ 
gate for scales or the fly while the 
fruit is green. 
