66 
FLORIDA STATE HORTICULTURAL SOCIETY 
-: Do you conduct experiments 
during warm weather? 
Yothers: The sunlight was very hot 
along about September 20th, about the 
hottest weather of last year. No, I guess 
the hottest was in May, but I remember 
it was extremely hot. 
-: What per cent of oil should 
be used in spraying? 
Sadler: Use 1 to 63, and in using 
Fico, 1 to 60, and Ideal paste, the same. 
They contain 63 to 65% of oil. 
Last year we used the paste and it took 
all the leaves and the fruit. Had very 
satisfactory results in spraying for white 
fly; sprayed Dec. 1st, but in every case 
had some leaves fall and scalding of fruit. 
-: How satisfactory is it in us¬ 
ing hard water? 
Sadler: We use Mt. Dora well water 
and it is 135 feet deep, very hard and 
called good drinking water. 
Krome: You did not do anything to 
break it? 
Sadler: No. I have had a fourth of 
a tree killed by spray. I think it was due 
to a little oil on the surface of the last of 
the tank. I know too much oil will kill 
everything and that happened while I was 
not present. We have to have dependable 
help in spraying trees. 
Krome: When I used the water with¬ 
out breaking I got that same burning that 
you got. 
-: Mr. Chairman, I used to have 
the same experience in my groves from 
free oil in the bottom of the tank. When 
a product is put on the market it should 
be dependable and not allow the grower 
run a risk like this. I have seen lots of 
fruit that has been burned and also de¬ 
stroyed by the spraying. 
Yothers: You will get some shadow¬ 
ing, even when the soluble sulphur is used 
with the oil. That is the only objection 
we find to the use of oil in the trees. It 
does produce some shadowing when the 
temperature is very hot. That shadowing 
can be eliminated by a slight mixture of 
Bordeaux Mixture. I am not prepared to 
say how little a quantity of Bordeaux will 
prevent shadowing. I regret to say that 
is the only objection the oil emulsion has, 
there will be some shadowing. In Pinel¬ 
las county, because the emulsion produces 
that shadowing, they spray in winter time. 
They stop spraying in summer time and 
spray about twice in the winter time, and 
let it go at that. 
-: Will not the use of hydrate of 
lime prevent that shadowing? 
Yothers: I don’t know. 
Krome: I have tried the use of hvdrate 
of lime and it prevented any shadowing. 
My experience with soluble sulphur has 
been directly in line with yours. I have 
had severe shadowing and burning and it 
is traced directly to the use of soluble sul¬ 
phur. 
Sadler: Can you mix lime sulphur with 
oil emulsion? 
Yothers: That is a rather delicate 
question to answer. Several people have 
mixed lime sulphur with oil emulsion. In 
fact I think if used by the proper grower, 
is all right. I know one grower in Orange 
