BUREAU OF PLANT QUARANTINE 
33 
DATE SCALE ERADICATION 
Inspection and clean-up work was continued in the date-growing areas of Ari- 
zona and California. Inspection from ladders was discontinued in some areas, 
only offshoots and such foliage as could be reached from the ground being ex- 
amined. Many plantings were given their final inspections and are considered 
free from Parlatoria date scale (Parlatoria blanchardi Targ.). Certain areas were 
rescouted to locate unlisted palms. Checking previously cleaned areas for 
volunteer plants was also continued. The details are given in table 12. 
Table 12. — Palm inspection and treatment, date-scale eradication project, fiscal 
year 1934 
Ari 
?ona 
California 
Item 
Phoenix 
district 
Yuma 
district 
Coachella 
Valley 
district 
Imperial 
Valley 
district 
Total 
Palm inspections 
59, 764 


2, 172 


203, 841 


27. 695 

1 
293, 472 
New infested properties 

Total infested properties.. . . 
1 
Date palms infested 






11 

11 
Other palms infested.. ... 

Total 



11 
11 
Treatment: 
Defoliated and sprayed. . 






10 
1 
10 
No treatment (dead scale) 
1 
Total 
o 


11 
11 
Valueless palms dug out in infected areas; not in- 
cluded above ... 
. .. 
10 

605 
9 
624 
COACHELLA VALLEY 
During the year 203,841 palm inspections were made in the Coachella Valley 
and no Parlatoria scale was found. This is the second successive year since the 
beginning of the project that no scale has been found in that district, and the 
third successive year in which no new infestation has been found. Many vol- 
unteer plants growing from seed and parts of stumps in previously cleaned plant- 
ings were destroyed, and 605 valueless palms in the infested area were dug out. 
Several hundred palms were pruned to facilitate inspection, and 50 were stripped 
of fiber in order than the leaf bases might be examined. A total of 8,847 ofTshoots 
were inspected for movement. 
IMPERIAL VALLEY 
^ In the Imperial Valley, 27,095 palm inspections were made during the year. 
Eleven infested date palms were found on 1 property, an old infestation, as com- 
pared with 2 infested date palms and 5 infested Canary Island palms on 1 prop- 
erties in 1933. While, as indicated, the infested property represents an old 
infestation, the original infestation had apparently been cleaned up, and the 
present infestation probably came from an outside source. One rather hea\il\ 
infested palm was found in .July, and the other 10, vers lightly infested, were 
found during the period > ptember t<> May. These 10 palms were grouped closelj 
around the palm found in July, and the infestation on them undoubtedly resulted 
from spread from the latter. 
Careful rescouting was carried on in 134% sections to locate unlisted palms. 
PHOENIX DIS1 RICT 
in the Salt River Vallej of Arizona, 59,764 palm inspections were made, and 
tie was found. Only ] infested palm has I. ecu found in Arizona in the past 
3 years. All palms on previously infested properties were pruned where 
sary for close inspection, and 10 were dug out and destroyed. Leaf bases were 
removed from all but 2 previously infested palms, Rescouting for unlisted palms 
was carried on in certain areas. 
90845— :m 5 
