BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 83 
newly hatched white-fringed beetle larvae 6 months after being 
mixed. DDT mixed with three commercial fertilizers and stored for 
5 months lost none of its effectiveness when used against newly hatched 
larvae. 
In other experiments, DDT mixed in the soil at 10 pounds per acre 
gave good control of newly hatched larvae for 7 years after applica- 
tion. Twenty-five pounds per acre gave complete mortality for 5 
years, and 50 and 100 pounds per acre gave similar protection in all 7 
years since application. 
Other materials which continue to show promise as soil insecticides 
capable of destroying the larvae are aldrin, chlordane, dieldrin, hepta- 
chlor, and toxaphene. 
On farmland, DDT applied in the drill row at planting time for 
3 consecutive years, in 1946, 1947, and 1948, at 2.5 or 5 pounds per 
acre has given good control of the white-fringed beetle each year 
through 1952. 
One application of DDT applied broadcast at the rate of 10 pounds 
per acre and disked into the upper 3 or 4 inches of soil in 1947 and 
1948 has given good control of the beetle each year through 1952. 
Regulatory Activities 
Since 1946 more than 52,000 acres of agricultural land have been 
soil-treated with 10 pounds of DDT per acre for white-fringed beetle 
control. Farmers and growers have now assumed this phase of con- 
trol work. Since 1950 farmers have applied DDT-fertilizer mixtures 
to an additional 10,000 acres of farmland. Since 1948 about 3,100 
acres of nursery land have been soil-treated with 50 pounds of DDT 
per acre. Responsibility for this procedure, which allows certifica- 
tion of nursery plants for movement without further treatment, has 
also been assumed entirely by the growers. During 1951 and 1952, 
some 6,000 acres of industrial and other noncultivated land, on which 
DDT could not be cultivated into the soil, received a 25-pound per 
acre surface application. 
During the year expenditures by the States, counties, municipal- 
ities, industrial concerns, growers, and others exceeded the expendi- 
ture by the Bureau. Insecticides were furnished and applied in the 
greater part by the individual concerned. Some insecticides were 
supplied by the States. 
By the end of 1952 beetles occurred in 152 counties in 8 States. 
During 1952 infestations were found for the first time in the fol- 
lowing nine additional counties: Elmore County, Ala.; Hancock 
County, Ga. ; St. Charles Parish, La.; Copiah, Lawrence, Lincoln, 
and Wayne Counties, Miss.; Scotland County, N. C, and Horry 
County, S. C. No specimens have been found for three or more years 
in Clay, Clayton, Effingham, Habersham, Muscogee, Spalding, and 
Troup Counties, Ga. ; Montgomery County, Miss.; Bladen County, 
N. C, and Fairfield County, S. C. These 10 counties therefore were 
removed from the infested list, with the result that a total of 142 
counties are recognized as having active infestations. In these 142 
