BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 77 
to Gilbert, in Maricopa County. Following the discovery of pink 
bollworm infestation in the 1938 crop, immediately after cotton was 
picked, early in December, field clean-up operations were begun in 
the center of the heaviest known infestation, involving 3,100 acres. 
The Arizona Legislature supplemented the Department fund of $15,000 
available for this work with a like amount. The program consisted of 
(lit ring, raking, and burning the cotton stalks as soon as the cotton 
was picked and the plowing of fields to prevent sprouting from the 
roots and the producing of fruit to propagate and maintain the pink 
bollworm prior to the fruiting of the 1939 cotton crop. This phase of 
the program was completed in mid-March. 
The completion of these control measures was followed by a spring 
program, inaugurated on April 10, the objectives of which were as 
follows: (1) To prevent the growth of all stub cotton, (2) to secure 
the plowing up of all abandoned cotton fields by April 20. (3) to 
delay the planting of upland cotton until April 10 and prevent the 
fruiting of any cotton until June 20. It soon became apparent that 
some volunteer cotton could not be eliminated from the areas affected, 
and as the State of Arizona did not have authority to forbid the 
growing of stub cotton, the assistance of the Agricultural Adjustment 
Administration was sought. As a result, the A. A. A. issued a regula- 
tion on April 29 requiring the destruction of all stub cotton in the 
area, and this resulted in destruction of 5.210 acres of abandoned vol- 
unteer cotton and 288 acres of cultivated stub, nearly all in Pinal 
County. 
Planted cotton was held back by volunteer cooperation among the 
growers, either by delayed planting, by withholding water, or both. 
Indications are that prior to June 20 there was no cotton in fruit 
sufficient to propagate the pink bollworm in Pinal County or in that 
part of Maricopa County where eradication work was carried on. 
except in a few isolated plantings. 
SITUATION IN OLDER REGULATED AREAS 
Gin-trash inspection in the El Paso Valley district during the 1938 
season indicated that there was no material change in the status of 
pink bollworm infestation over the previous season in that district 
except in lower Hudspeth County, where it was somewhat heavier. 
Inspections made in the Juarez Valley of Mexico, across the Rio 
Grande from this district, and also in Vado and Villa Ahumada, 
Mexico, indicated that infestation in those localities was rather heavy. 
The Texas Panhandle district was given the most thorough inspection 
during, the 1938 crop season it has had for a number of years. As a 
result, it was found that the infestation, while very light, was rather 
well distributed. The greatest number of worms were found in Mid- 
land County, where 16 were taken from 482 bushels of trash. One 
specimen was found in Lamb County, which is the first finding since 
the county was originally found infested in the 1933 crop. In the 
Pecos Valley district inspections in Ward, Reeves, and Pecos Counties 
disclosed a general infestation averaging about 17 worms per bushel. 
In the Presidio area infestation was somewhat heavier than during 
the previous year. 
