THE PECAN LEAF CASE-BEARER. 
The results of these experiments are as follows : 
17 
Table XI. — Spraying experiments for the destruction of hibernating larvx of the pecan 
leaf case-bearer at Monticello, Fla., in 1913. 
Plat 
No. 
Number 
of trees. 
Treatment. 
Date 
of appli- 
cation. 
Results. 
I 
V 
VII 
11 
10 
14 
Commercial lime-sulphur 
solution, testing 33° 
Baume, at 1 gallon to 8 
gallons of water. 
Miscible oil at 1 gallon to 20 
gallons of water. 
Check; untreated 
1913 
Mar. 3 
Mar. 25 
40 per cent of the larvae emerged from hiber- 
nacula. Buds and foliage very seriously- 
damaged by larvae. 
75 per cent of the larvae emerged from hiber- 
nacula. Buds were badly damaged by 
larvae. 
Practically all larvae emerged. Nearly 
every bud was either totally or par- 
, tially destroyed. Some trees were com- 
pletely defoliated. 
Neither the lime-sulphur solution nor the miscible oil gave satis- 
factory results, but of the two, lime-sulphur was the better. In 
this series of experiments a proprietary insecticide consisting of 
distillate oil, tobacco, and soap, and another one consisting princi- 
pally of oil were tried at dormant strengths in Plats II, III, and IV, 
which are not included in Table XI, and both of these were found 
to be ineffective against the hibernating larvae. 
On February 15, 1913, in the Pabst orchard at Ocean Springs, 
Miss., fifteen 10-year-old trees were sprayed with commercial lime- 
sulphur at 1 gallon to 8 gallons of water, and on the same date six 
10-year-old trees were sprayed with miscible oil at the rate of 1 gal- 
lon to 15 gallons of water. Since it was impossible for the writer to 
make observations on these sprayed trees because of stress of work at 
Monticello, Fla., Mr. Chas. E. Pabst, of Ocean Springs, Miss., was 
requested to report the results of these experiments. In his report 
he stated that there seemed to be a slight benefit derived from the 
lime-sulphur treatment, but so far as could be determined the 
miscible-oil-sprayed trees were as badly infested with larvse as the 
trees that were left untreated. 
In order to obtain additional information on the two most common 
dormant season sprays, a series of spraying experiments was con- 
ducted at Ocean Springs, Miss., and another at Monticello, Fla. The 
results of this work are shown in Tables XII and XIII. 
