FLORIDA .STATE HORTICULTURAL SOCIETY. 
93 
scale. What time is the best time to spray 
for the scale ? What time are they gener¬ 
ally on the move ? 
Dr. Berger: Some varieties first be¬ 
gin to move freely during March and 
April. They begin to move again later 
on, say June or July. According to what 
has been written about scales, we consid¬ 
er that there are three broods. I have 
not had occasion to work much with 
scales myself. The best way would be 
to watch the grove carefully. It is not 
so difficult to watch the trees and see the 
condition existing; whether the eggs or 
adults or crawlers are there. If they are 
hatching, that is, the young are crawling, 
that would be a signal to spray. In the 
spring, while spraying for the rust mite, 
you might mix Whale Oil Soap at the rate 
of one pound to about six gallons of the 
soda-sulphur or potash sulphur spray, 
which would apply against the young 
scales present as well as the mites. Soap 
would not mix with lime-sulphur solu¬ 
tions. 
Mr. Skinner: We generally use six¬ 
teen pounds of Whale Oil Soap to the 
barrel, and sometimes we kill them, and 
sometimes we don’t. 
Dr. Berger: Of course, no strength 
of soap will destroy the eggs. It may de¬ 
stroy the adults but not the eggs. Spray 
one or two times during spring or sum¬ 
mer when the young are crawling and 
note results. 
Mr. Skinner: Is there any solution to 
effectually kill the scale ? 
Dr. Berger: I have seen very nice re¬ 
sults with Schnarr’s solution. It was 
used at Boardman in Mr. Sampson’s 
grove last July and apparently it did not 
do any injury to the trees or the fruit. 
The Target Brand is considered in the 
same class. I have not had occasion to 
compare them, but reports put them about 
equal. 
Mr.—How about kerosene emulsion? 
Dr. Berger : Generally considered 
good; it is considered one of the best. 
Mr.—What do you think of Thrip 
Juice? 
Dr. Berger: Thrip Juice is recom¬ 
mended only against the young, crawling 
scales. 
Prof. Rolfs: I would like to have a 
word. I think in a large measure our 
scourge of the whitefly has been due to 
our carelessness and indifference to the 
information we already have. In other 
words, we let infested chinaberry trees 
grow and breed whitefly by the millions, 
and then weep and bemoan our fate be¬ 
cause the plague of whitefly is sent upon 
us. Now, I have in mind where a certain 
community thought it wiser to fight the 
whitefly when it was in another locality 
rather than to wait until it got into their 
own place. I found that it cost the peo¬ 
ple in that community one cent per tree 
per year to fight the whitefly in another 
fellow’s grove. Now, if they had waited 
until the whitefly got into their own 
groves, they would have had to pay 25c. 
or 30c. a tree. We have adopted the “let 
alone” policy, when we should have gone 
out and been in the thick of the fray. 
Dr. Inman: I think Prof. Rolfs was 
referring to our community. Winter Ha¬ 
ven. I am drawing the attention to my¬ 
self, but don’t claim any of the praise. 
I was away when the whitefly was dis- 
