BUREAU OF PLANT QUARANTINE 6 
boroughs or other political subdivisions within or bounded by these townships or 
cities in Luzerne County, and the townships of Lackawanna, Ransom, Dunmore, 
Spring Brook, Jefferson, Roaring Spring, and Scranton, the city of Scranton, and 
any boroughs or political subdivisions within or bounded by these townships or 
cities in Lackawanna County, was announced March 15, 1933. Inspection of 
materials likely to carry infestation is required. 
The principal materials inspected thus far have been props and lagging used 
in the mines, 6,721 units of this material having been inspected and certified up 
to the close of the fiscal year. 
The results obtained in Pennsylvania have been most satisfactory considering 
the unusual difficulties which arose as a result of this emergency work. Although 
the area was scouted substantially as planned, the extreme limits of the infestation 
have not been determined up to the present time. A study of weather records 
which have been secured from the Scranton, Pa., station of the United States 
Weather Bureau covering the past 10 years, indicates that the trend of spread 
based on favorable wind and temperature conditions at the time when the wind 
spread of small larvae was possible, ranged from north to southeast from the 
central infested area. Unfavorable conditions for spread during this period in 
the sector northwest to south of the center was indicated. The actual spread 
that has been determined thus far has been principally in the directions indicated 
as favorable, but sufficient work has not been done to determine the outside 
limits of infestation. Intensive work is necessary on this project as this infesta- 
tion is one of the largest and most difficult to handle that has been found outside 
New England. 
CONDITION OF THE INFESTED AREAS IN NEW ENGLAND 
Defoliation by the gypsy moth was more extensive during the summer of 1932 
than during the previous year, the total area amounting to over 286,395 acres. 
The forests which were most completely stripped were those located south of 
Boston, in southeastern Maine, and in New Hampshire north and east of Lake 
Winnepesaukee. White pine suffered severely, particularly many of the smaller 
trees in Massachusetts, and the growth of deciduous trees was greatly retarded 
as is now shown by the subnormal length of twigs and branches. 
Records received from owners of cranberry bogs in the territory south of 
Boston and on Cape Cod indicate a loss of 2,780 barrels of fruit for the year, and 
as severe defoliation injures the growth so as to prevent fruiting the following 
year, the entire loss for the 2 years will approximate $55,600. 
BARRIER-ZONE PROJECT IN NEW ENGLAND AND NEW YORK 
At the beginning of the fiscal year severe reduction in expenditures was made 
necessary by a 38 percent cut in the funds available for the gypsy-moth project. 
On this account it was necessary to curtail purchases of supplies and equipment 
to the minimum, and in addition to dismissing more than 90 regular salaried 
employees, it was necessary to furlough 69 others for 1 month in order to keep 
within the funds available. 
Woodland scouting in the barrier zone, except in the area where the most in- 
festations have been found, was abandoned; and during the latter part of July, on 
account of the finding of the serious infestation in northeastern Pennsylvania, 
the work in the barrier zone was further reduced by the diversion of $78,000 to 
provide for this unforeseen emergency. 
As a result of such limited work as could be done in the barrier zone, 30 
infestations were found — 17 in towns in southwestern Massachusetts and 13 in 
northwestern Connecticut. Twenty-four of these were severe enough to require 
extensive spraying, and more than 1,900 acres were treated in this way during 
the month of June 1933. Weather conditions were excellent for spraying, ami 
effective results have been secured in the areas treated. 
In the New York section of the barrier /cue extensive scouting has been done 
the by conservation department of that State. Two infestations were located, 
one at Dover and another at Milan. These were treated and thoroughly sprayed 
In recent years, particular!} in the spring of 1929 and 1930, rather cone! 
evidence was secured that weather conditions were favorable for wind spread 
of the smaller caterpillars from territorj easl of the barrier /one to the section 
of the zone in southwestern Massachusetts and northwestern Connecticut. It 
is, therefore, of primary importance that more extensive work be done in this 
section of the /.one, and that the woodland areas that have uever been examined 
in Vermont and Connect? cut be Inspected at the earliest possible date. 
