BUREAU OF PLANT QUARANTINE 
21 
at Mexicali, Lower California, about 2 l /i months. A total of 89,406 bushels of gin 
trash was inspected outside of the regulated areas, the results all being negative. 
It takes approximately 10 acres to produce a bushel of gin trash; therefore the 
number of bushels examined would represent the inspection of 894,060 acres. 
The number of bushels of gin trash inspected in each State is shown in table 7. 
Table 7. — Summary of gin-trash inspection for the -pink bollworm outside regulated 
areas, crop season 1932 
State 
Gin 
trash 
in- 
spected 
State 
Gin 
trash 
in- 
spected 
State 
Gin 
trash 
in- 
spected 
Bushels 
2,975 
4,074 
l. 653 
7,760 
2,460 
5,524 
Bushels 
3,362 
2,309 
746 
3,373 
1,951 
1,029 
Texas 
Bushels 
37,629 
Lower California, Mex- 
13, 561 
TotaL. 
Florida 
South Carolina 
89,406 
As in previous years, a quantity of green bolls was collected from the various 
cotton States, these collections being largely confined to areas where no other 
means of inspection were available. This season approximately 11,704 samples 
of 100 bolls each were collected; also, 1,405 bushels of bollies. The inspection 
of this material is now nearing completion. In addition, samples of cottonseed 
were collected from the Delta area of Mississippi, Arkansas, and southwestern 
Tennessee, where cotton production is extremely heavy and the amount of gin- 
trash inspection was not considered sufficient. These seed samples were collected 
late in the season from representative gins and oil mills, a total of 7,400 pounds 
being secured in 10-pound samples. The inspection of these samples is also near- 
ing completion. The results of this inspection have been negative to date. 
CHANGES IN REGULATIONS 
There were three changes made in the pink-bollworm-quarantine regulations 
during the fiscal year 1933. The first change, effective September 15, 1932. 
released from the fumigation requirement cotton produced in Grant and Hidalgo 
Counties, N.Mex., and in Maricopa and Greenlee Counties, and those parts of 
Pinal and Graham Counties, Ariz., not under additional regulations on account 
of the Thurberia weevil. 
The second change became effective October 29, 1932, under which the follow- 
ing counties in Florida were added to the regulated area: Alachua, Baker, Brad- 
ford, Columbia, Gilchrist, and Union. 
The third change became effective on February 28, 1933. Under this change 
the following counties in Texas were released from the regulated area: Loving, 
Winkler, Andrews, Ector, Crane, Upton, and that part of Midland County which 
had been under regulation. 
CONTROL MEASURES ENFORCED TO PREVENT SPREAD 
The most important safeguards which have been in force for a number of years 
to control and prevent the spread of the pink Itollworm from infested areas are 
(1) disposal of Kin trash, (2) sterilization of seed, (3) supervision of oil mills, 
(4) fumigation and compression of lint, and (5) road-inspection stations. 
Disposal of gin trash. — Gin trash is disposed of daily by burning, sterilization, 
or grinding, as many pink bollworma are discharged in this trash during the 
process of ginning. The State regulations of Texas and New Mexico require 
this daily disposal of trash up to December l of each year, the average killing- 
date being prior to this, alter which the trash may be returned t.» farms 
for feeding, fertilizer, or other purposes. In areas where a killing frost has not 
occurred prior to this date, the ginners have always cooperated whole-heartedly 
in continuing the daily disposal of trash until there has been a killing frost. 
Seed sterilization. One of the most important and useful measures in pre- 
venting the spread of the pink bollworm is seed sterilization. All gins in the 
regulated area are equipped with sterilizers, whereby the seed is heated to a 
temperature of 145° F. as a continuous process during ginning, the sterilizers 
being equipped with thermographs bo that the temp eed is recorded 
