<94 
FLORIDA STATE HORTICULTURAL SOCIETY. 
covered, but I don’t think it was more 
than forty-eight hours before a fund was 
raised to fight the whitefly. The assess¬ 
ment was one cent, per tree. There were 
very few of the people who did not join. 
Since that time, we have held the white- 
fly in check and have kept our groves 
•clean and have not had a smutty leaf or 
fruit. The area over which the whitefly 
has spread, is very little, as far as we 
know. 
Another question that I will discuss 
here, is the scale question. We all have 
.some scale in the Winter Haven region, 
but we have it pretty well under control 
by adding Hammond’s Thrip Juice as 
follows: 
One-half pint Thrip Juice, beaten into 
an emulsion with an equal quantity of 
kerosene. Then add water to make a 
bucketful. Then strain the whole through 
•cheese cloth into a fifty gallon barrel of 
Sulphur Spray, and stir thoroughly. 
Thrip Juice should be used with cau¬ 
tion and only early in the season and not 
after the fruit has become larger than an 
English walnut. Continuing its use after 
the fruit has assumed considerable size, 
may cause spots on the under side of the 
fruit where the concentrated drip evapo¬ 
rates and burns the skin. Another objec¬ 
tion to using it late in the season is that 
ft destroys the acidity of the fruit and ren¬ 
ders it insipid. It is quite generally used 
in the Florence Villa and Winter Haven 
regions, and I have not for years heard 
■of a grower complaining seriously of the 
scale pests. 
It is very unusual to see scale infested 
fruit brought into the Exchange packing 
bouses. 
Mr. Porcher: We have used at Day¬ 
tona Whale Oil Soap, Good’s No. 3, as 
strong as eighteen pounds to fifty gallons 
of water. We have held the whitefly 
there in check, but have done nothing 
more than that. 
I think I read an article by Dr. Back 
in the Florida Fruit and Produce 
News in which he speaks of the Schnarr 
and of the Target Brand insecticides, 
very favorably. 
We are impressed by the fact that for 
years we have heard talk of the extermi¬ 
nation of the whitefly pest, but we are 
no nearer this end than we were when we 
began. It seems to me that these gov¬ 
ernment people, after they have made 
their scientific tests should give us com¬ 
plete, clear statement as to facts upon 
which to base conclusions. This Schnarr 
preparation as I understand it, has given 
very good results, and as Dr. Back has 
written an article, it seems to me that it 
would be a good idea for him to lead us 
along a little farther. I mean, the spray 
is recommended highly, but we hear noth¬ 
ing further than that. I would like a def¬ 
inite statement as to what it will and will 
not do. 
Dr. Back: I would like to say that 
it is a very easy matter for entomologists 
to test our various patent insecticides and 
to determine their relative value. In fact, 
we have already done this with nearly all 
the whitefly insecticides and now have in 
press a circular on the subject which will 
give the information desired more fully 
than my recent article in the Produce 
News. One objection to our spending 
time in trying out patent insecticides is 
