64 
FLORIDA STATE HORTICULTURAL SOCIETY 
so many eggs and crawlers as is usually 
present—perhaps not more than 20% of 
the females had either eggs or crawlers. 
Quite a number of first instar young were 
present. A single tree in the front yard 
was sprayed June 15th and again July 
28th with 1% oil. On August 15th there 
were 117 living and 43 dead adult females 
present on 13 leaves or 73% living. Eggs 
and crawlers were present but all recently 
settled young had been killed. 
Three 'Applications. — Sprayed July 
28th, 1%; August 16th, 0/2%, and Sep¬ 
tember 20th, 1%. Used 50 gallons of 
material and sprayed same trees on Sep¬ 
tember 20th as given under one and two 
application tests. Examined September 
29th or nine days after spraying. An ex¬ 
amination of 25 leaves gave 178 living 
and 227 dead adult females or 44% liv¬ 
ing. There were also 67 living females 
nearly adult which were beneath other 
scales, 283 crawlers and 156 normal eggs. 
A final examination was made December 
7th, when 29 living adult females were 
found on 15 leaves. The three applica¬ 
tions certainly reduced the red scale, but 
enough were left for a rapid re-infesta¬ 
tion. The health of the trees improved 
and no damage was done to the limbs or 
foliage, but some spotting was done to the 
fruit. 
TESTS WITH 2% OIL 
One Application. — Sprayed August 
16th; used 50 gallons material. Emulsion 
made of Nabob. On August 24th or eight 
days after spraying, an examination of 
10 leaves gave 53 living and 199 dead 
adult females or 21% living. A second 
examination of 33 leaves made on August 
30th, or 14 days after, treatment, gave 82 
living and 332 dead adult females, or 
19.8%. It is thus seen that there were as 
many dead eight days after spraying as 
there were on 14 days. On September 
20th sprayed additional trees infested with 
red scale. On September 29th an exami¬ 
nation of 25 leaves gave 344 dead and 9 
living adult females. Only 3 crawlers and 
32 eggs were counted. A final examina¬ 
tion was made on December 7th, and we 
were unable to find enough leaves with 
scale on them to make a count. This sin¬ 
gle application of 2% produced highly 
satisfactory results. 
Two Applications .—Two per cent— 
J 4 Corvus, J 4 Nabob. Sprayed August 
16th and September 20th. Examined 
September 29th. On 25 leaves there were 
198 dead and 5 living adult females, 6 
nearly adult females beneath other scales, 
3 crawlers and 12 apparently normal eggs. 
On December 7th there were no scales 
present, so no count was made. 
TESTS WITH 3 % OIL 
On August 16th we sprayed four rows 
of nursery trees using 3% Nabob oil. 
The work was most carelessly done. On 
August 24th an examination of 10 leaves 
gave 414 living and 344 dead adult fe¬ 
males or 54% alive. The test with 2% 
applied when I was present gave 21% 
alive. Subsequent observations certainly 
indicated that many were left unharmed 
by the spray. A second examination 
made on August 31st gave 476 living and 
369 dead adult females, or 56 1-3% liv¬ 
ing. Owing to the unsatisfactory results 
obtained spraying August 16th, it was 
