BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
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lished. Two parasites of the vetch bruchid were imported and liber- 
ated in infested fields. One of these has since been recovered from 
field-collected host material, apparently indicating that it has become 
established. 
INSECTS ATTACKING SUGARCANE 
According to surveys conducted in 1939, the loss to the sugarcane 
crop caused by the sugarcane borer was the heaviest for many vears 
and was estimated at $4,231,000. A practical trial was made of con- 
trol through the application of cryolite dust which gave experimental 
control on a small scale in 1938. In this recent experiment 40 acres 
of cane were dusted four times, and the results of these applications 
were shown to have saved cane to the net value of over $11 per acre 
from attacks of the borer. 
Definite proof was obtained of the presence of distinct resistance 
to attacks of the borer in certain varieties and strains of sugarcane. 
Replicated experiments showed that the selection of noninfested 
seed cane for planting gave returns of 2 more tons of cane per acre 
than when heavily infested cane was used as seed. Cane having 7 
joints bored was found to give 25 pounds less sugar per ton than 
sound cane. 
WHITE-FRINGED BEETLE CONTROL AND ERADICATION 
Among the important accomplishments of the white-fringed beetle 
program were the apparent eradication of the pest in several limited 
areas and the drastic reduction of the adult beetle population in all 
infested areas. This reduction in beetle population materially less- 
ened the danger of natural spread as well as of movement of the pest 
on host materials. As a direct result of such effective control the 
regulations of the Federal quarantine were modified to remove re- 
strictions on certain classes of articles from a major portion of the 
regulated area and to make restrictions less drastic on other host 
materials 
The methods employed to control the white-fringed beetle con- 
sisted of dusting calcium arsenate and cryolite on host plants; of 
using an oil-base emulsion to eliminate host vegetation along railroad 
rights-of-way, roadsides, abandoned fields, and waste areas; of adopt- 
ing clean-cultivation practices in crop areas; of utilizing soil fumi- 
gants in certain isolated areas of infestation; and of putting sanita- 
tion practices into effect on and in the proximity of places from which 
materials likely to carry adult beetles were to be consigned for move- 
ment to points outside infested areas. Effective applications of in- 
secticidal dusts in nonresidential areas were accomplished by use of 
Federal-owned airplanes. One or a combination of such control 
measures was applied on all known infested properties. 
As a result of intensive surveys to determine the distribution of 
the pest, several new points of infestation, all in the approximate 
vicinity of previously known infestations, were found, the most 
extensive of which was in the vicinity of Hattiesbnrg, Mi<s. The 
total known infested areas comprise approximately 70,000 acres, lo- 
cated in 6 counties in Alabama, in 3 in Florida, in 8 in Mississippi, 
and in 4 parishes in Louisiana. 
During the year Federal-State->ponsored W. P. A. project- were 
in operation. The removal of brush and debris and other types of 
