28 



CIRCULAR 4 64, U. S. DEPARTMENT OE AGRICULTURE 



EXTERMINATION PROJECT IN PENNSYLVANIA 



Late in July 1932 a serious infestation was discovered near Pitts- 

 ton, Luzerne County, Pa., through the location of male moths by 

 a biology student. A survey was made and scattered infestations 

 were found over a wide area. An eradication program was adopted 

 under the supervision of the officials of the Federal Bureau of Ento- 



NEW YORK 



FISCAL YEAR 



1935 . 



— — DELIMITS KNOWN AREA OF GYPSY MOTH 



INFESTATION- APPROXIMATELY 410 SQUARE MILES 



• INFESTATION ' 



© ISOLATED INFESTATION 



■■■ PENNSYLVANIA QUARANTINE - SEPTEMBER I, 1934 

 APPROXIMATELY 880 SQUARE MILES 



GYPSY MOTH PROJECT 



NORTHEASTERN PENNSYLVANIA 



*f» jeiser 



Figure 15.— Gypsy moth infestation in northeastern Pennsylvania in 1935. 



mology in cooperation with the Pennsylvania Department of Agricul- 

 ture and Department of Forests and Waters, and an office was estab- 

 lished in Wilkes-Barre. From the fall of 1932 to the spring of 1933 

 over 1,200 acres of tree growth were thinned and cleared of brush and 

 worthless and dead trees in the worst infested portion of the area. 

 During the same period about 2 million egg clusters were destroyed 

 by creosoting. In the summer of 1933, 3,200 acres of woodland and 

 thousands of trees in residential sections and open country were 



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