44 



BULLETIN 1103, U. S. DEPARTMENT OF AGRICULTUEE. 



has led to a substitution of a regulated zone for the noncotton zone 

 in that district for 1922. 



Only two new centers of infestation have been located — five fields 

 in the vicinity of Ennis in Ellis County and a field near Marilee in 

 Grayson County, in Texas. It is believed that these outbreaks origi- 

 nated from the seed of the crop of 1920 shipped from Carlsbad. X. 

 Mex., prior to the determination of the incipient infestation at that 

 point. 



The Pecos Valley, Great Bend, and El Paso districts are almost 

 certain to be reinfested every year under any system of clean-up or 

 control which involves the continuation of the growth of cotton, or 

 until such cooperation with Mexico is obtained as will lead to the 



Fig. 24. — Geographical distribution of the pink bollworm in tlie United States in 1921 

 (solid-colored areas) and areas previously infested but reported free in 1921 (shaded 

 areas). 



cleaning up of the land on the Mexican side of the Eiver and the 

 freeing of the railway traffic from infestation at some interior point 

 in Mexico. 



On the accompanying map (Fig. 24) the shaded areas were for- 

 merly infested but were reported as free from the pink bollworm in 

 1921. The solid black areas were known to be infested in 1921. 



JAPANESE BEETLE. 



{PopilUa japonica Newm.)" 

 The Japanese beetle, a native of Japan, was introduced into the 

 United States in Burlington County, N. J., prior to 1916, presumably 

 in the grub stage in soil about the roots of perennial plants. It was 



10 From reports of John .7. Davis, C. W. Stockwell, and C. H. Hadley. 



