BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 13 
2-county-wide tier along the eastern perimeter of the 1949 regulated 
area. The infestation in Louisiana marked the third appearance of 
the pink bollworm in the State. Following eradication of the second 
infestation there, the quarantine had been removed in 1946. In Flor- 
ida there was a marked decrease in the infestation of wild cotton 
from that found shortly after the eradication of wild cotton was re- 
sumed there in 1949 after a 2-year interval. 
The 1950 cotton crop was inspected for pink bollworms within all 
regulated areas, as well as in Alabama, Arkansas, California, Georgia, 
Louisiana, Mississippi, Oklahoma, the nonregulated sections of Ari- 
zona and Texas, and the domestic cotton-growing area of Florida. 
Similar inspections were made in Sonora and Sinaloa, on the west 
coast of Mexico. 
Noncotton zones established in Louisiana 
A clean-up program for cotton fields was inaugurated in Louisiana 
immediately following the finding of pink bollworms there. Novem- 
ber 15 was set as a mandatory deadline for the destruction of cotton 
stalks. A few fields in Cameron Parish showed an almost 100-percent 
infestation in green bolls late in the season, with as many as 15 pink 
bollworms to the boll in some fields. Farmers were informed of the 
infestation by radio and through meetings called in the various com- 
munities. An estimated 99 percent of the infested fields were cleaned 
up on time. A State order designated Cameron Parish and parts of 
Calcasieu and Vermilion Parishes as zones in which cotton was not 
to be grown in 1951. The acreage taken out of cotton in the three 
parishes amounted to approximately 1,200 acres. 
Control by insecticides demonstrated to growers 
A spraying program was demonstrated in Maverick County, Tex., 
early in the crop season. A DDT-toxaphene spray was applied to 
control the insects that delayed early setting of the crop, thereby get- 
ting a quicker maturity of the cotton and earlier destruction of the 
stalks. 
A mixture of benzene hexachloride, DDT, and sulfur was applied 
as a dust to cotton on about 1,200 acres in the Pawnee section of Bee 
and Karnes Counties, Tex. This acreage was fairly heavily infested ; 
it could have been the source of a spread of the infestation to areas 
free of the pest. 
Quarantine procedures modified 
Changes were made in the authorized methods of treatment as a 
condition for the interstate movement of cottonseed. The counties 
of Curry and Quay in New Mexico were added to the lightly infested 
area from which cottonseed might be shipped after fumigation. A 
new method of fumigating bulk cottonseed in railway cars or trucking 
vans was approved as a second treatment preliminary to certification 
for movement from the heavily infested area. These changes were 
effective July 19, 1950. 
The State of Louisiana was included in the quarantined area on 
May 29, 1951, and the lightly infested area was extended to include 
12 parishes of that State, along with 1 county in Xew Mexico, 4 coun- 
ties in Oklahoma, and 44 counties in Texas. Samples of cotton lint 
