18 
BULLETIN 571, U. S. DEPARTMENT OE AGRICULTURE. 
Table XII. — Spraying experiments for the destruction of hibernating larvse of the pecan 
leaf case-bearer at Ocean Springs, Miss., in 1914- 
Plat' 
No. 
Number 
of trees. 
Treatment. 
Date 
of appli- 
cation. 
Result. 
I 
II 
III 
32 
17 
10 
Commercial lime-sulphur 
solution, testing 33° 
Baume, at 1 gallon to 8 
gallons of water. 
Commercial lime-sulphur 
solution, testing 33° 
Baume. at 1 gallon to 10 
gallons of water. 
Check; unspraved 
1914 
Mar. 9 
...do 
Very slightly benefited. Sufficient num- 
ber of larvse emerged to do considerable 
damage to buds and foliage. 
Very slight benefit. A large percentage of 
larvse emerged from hibernacula and 
severely injured the buds and foliage. 
Practically all larvse that were not parasi- 
tized emerged from hibernacula. Buds 
and foliage were severely injured. 
Table XIII. — Spraying experiments for the destruction of hibernating larvse of the pecan 
leaf case-bearer at Monticello, Fla., in 1914- 
Plat No. 
Number 
of trees. 
Treatment. 
Date of 
application. 
Results. 
I 
II 
III 
12 
10 
8 
Commercial lime-sulphur 
solution at 1 gallon to 8 
gallons of water. 
Commercial lime-sulphur 
solution at 1 gallon to 10 
gallons of water. 
Xtiscible oil at 1 gallon to 
20 gallons of water. 
Mar. 22,1914 
do 
do 
Slight benefit, but a sufficient number 
of larvse emerged to do much dam- 
age to buds and foliage. 
Slight benefit, but many larvse emerged 
from hibernacula and did considera- 
ble damage to buds and foliage. 
Practically no benefit derived from the 
treatment. 
The results, as will be noted in Tables XII and XIII, show that 
the lime-sulphur solution at 1:8 and 1:10 gave a slight benefit, 
but that miscible oil was a decided failure. The number of larvse 
destroyed by the lime-sulphur treatments was not sufficient to combat 
this pest satisfactorily. Although it has been suggested and advised 
by certain entomological writers that this pest can be controlled by 
the use of lime-sulphur during the dormant season, the results of all 
the experiments show conclusively that the treatment can not be 
depended upon as a remedy for the pecan leaf case-bearer. 
SPRAYING EXPERIMENTS AGAINST OVERWINTERED LARV.E. 
Experiments at Monticello, Fla. 
The work at Monticello, Fla., was conducted in the pecan orchards 
of the Summit Nurseries and the Standard Pecan Co. For the spray- 
ing regular orchard gasoline-power outfits were used and the spray 
material was applied very thoroughly at a pressure ranging from 175 
to 200 pounds. The results of the experiments are shown in Tables 
XIY and XV. 
