18 THE SAN JOSE SCALE. 
CALIFORNIA. 
The fact that the scale is at the present time disseminated through- 
out the State has already been indicated. In general the insect is 
much less dreaded by fruit growers now than ifc was a few years since. 
They feel greater confidence in their ability to control it either with 
winter washes or by the encouragement of natural enemies The gas 
treatment is very effective as shown by experiments conducted by Mr. 
Coquillett and others, but is not employed on deciduous trees except 
nursery stock. The resin washes give good results, and much also is 
claimed for various combinations of lime- sulphur- salt, these latter, 
however, proving practically valueless in the East. In some localities 
the main dependence seems now to be placed on the action of parasitic 
and predaceous enemies. These, either by artificial introduction or by 
the natural multiplication of native species, have become so efficient as 
to very materially lessen the destructive action of the scale as com- 
pared with its work in the earlier years of its occurrence. This result 
seems to be greatly aided by the existence of a disease which fre- 
quently almost entirely exterminates the San Jose scale and also the 
yellow scale. 
DELAWARE. 
The first report of the insect's occurrence in Delaware was sent to the 
Department January 15, 1895, by Dr. J. J. Black, of Newcastle. The 
trees affected were few in number and were young Lawson pears re 
ceived from one of the New Jersey nurseries in April, 1893, and planted 
in a small block separated from an older orchard by a private roadway. 
As soon as the scale was discovered by the owner the trees of the entire 
block, including some replants of 1894, which seemed to be perfectly 
free from scales, were cut off even with the ground and burned. The 
owner examined the adjoining trees very thoroughly and found no 
scales on them, but to satisfy himself of their freedom from infestation 
he requested an examination by some one from this office. Mr. Marlatt 
accordingly visited the orchard, gave the trees adjoining the infested 
block a most thorough examination, and was unable to find upon them 
any San Jose scales whatever. The entire orchard was in a most excel- 
lent condition and showed a vigor of growth, a healthful appearance, 
and a care in management which are seldom seen. The example of 
prompt action afforded by this case, if followed by all who have infested 
stock, would materially aid in the ultimate extermination of the scale 
in the East. 
A similar infestation of young stock was found in the following 
spring in an adjoining orchard belonging to Mr. Thomas Holcomb. The 
infested trees, from the same nursery, were few in number, and were in 
this case also destroyed. 
Mr. M. H. Beckwith, of the Delaware Experiment Station, sent us in 
February, 1895, specimens of the scale on crab apple, from an orchard 
near Felton. He reported it also at Newark on some plum and peach 
