BUREAU OP PLANT QUARANTINE 
29 
Eradication measures were promptly undertaken not only with respect to the 
three instances in which larval fruit flies were captured in local fruit but also in 
every case in which adult fruit flies were caught in the traps. All fruit trees 
within the four blocks surrounding each of the infested premises were sprayed 
with the same materials used in the case of similar outbreaks in the Texas area. 
In addition, two city-wide applications of the spray were made subsequent to 
the arrival of shipments of heavily infested fruits on the markets. Following the 
finding of larval infestations all fruit was stripped from the trees on the infested 
premises and, after being carefully examined, was destroyed by burial. The 
trees on these premises were given an additional application of the spray. 
Infestations did not develop to an extent necessitating a city-wide host-free period. 
The careful and systematic collection and destruction of infested fruit reaching 
the city from the interior of Mexico reduce to a considerable extent the chances 
of an infestation's becoming established. This risk is still further reduced by the 
operations of the flytraps, in which many adult flies are caught before their eggs 
have had an opportunity to develop. 
The fruit-fly findings in Matamoros are shown in detail in table 11. 
DATE-SCALE ERADICATION 
Systematic inspection was continued in the date-growing areas of Arizona 
and California. Careful scouting for unlisted palms was also continued. Several 
small abandoned date plantings of no value were dug out and destroyed, and 
previously cleaned acreage was checked for volunteer plants and parts of stumps. 
The details are given in table 12. 
COACHELLA VALLEY 
During the past year 123,759 palm inspections were made in the Coachella 
Valley. No Parlatoria scale was found. This is the first year since the beginning 
of the project that scale has not been found, and is the second successive year 
in which no new infestation has been discovered. There were dug out and 
destroyed during the year 775 date palms of no value, many of which had pre- 
viously been infested, and 219 previously infested palms were stripped of fiber 
to examine the leaf bases for scale. 
Table 12. — Palm inspection and treatment, date-scale eradication project, fiscal 
year 1933 
Arizona 
California 
Item 
Phoenix 
district 
Yuma 
district 
Coachella 
Valley 
district 
Imperial 
Valley 
district 
Total 
Palm inspections 
41,242 

1 
2,376 


123, 759 


43, 347 

4 
210, 724 
New infested properties 

Total infested properties .. 
5 
Date palms infested 
1 





2 
5 
3 
Canary Island palms infested.. 
5 
Total... 
1 


7 
8 
Treatment: 
Dng out and destroyed.. 
1 





1 
2 
Defoliated and sprayed. 
6 
Total 
1 


7 
8 
Valueless palms dug out in infested areas; not in- 
cluded above 


77:, 
95 
s7D 
[MPBR1 \\. \ ALLEY 
In the Imperial Valley, 43,347 palm inspections were made during the year. 
Two infested date palms were found on 2 properties both old infestation* 
compared with 11 infested date palms on 7 properties I old and 3 new infesta- 
tions found during the fiscal year 1932. In addition to the 2 infested date 
palms found in the fiscal year 1933, 5 Canary [aland palms were found it:: 
