14 ANNUAL REPORTS OF DEPARTMENT OF AGRICULTURE, 1933 
permitted to ship their stock without chemical treatment or freeing it from soil. 
All establishments returned to class I were scouted during the summer of 1932 
and their actual premises found free from beetles. 
A joint certification plan was inaugurated in the spring of 1933 whereby, in 
territory in which inspection and certification requirements under the gypsy- 
moth and Japanese-beetle quarantines overlap, inspections may be made and 
certificates issued by either the gypsy-moth or Japanese-beetle inspector. In- 
spectors performing this joint certification are supplied with rubber stamps with 
which they may affix to packages containing inspected material a joint certificate 
showing compliance with both Quarantines Nos. 45 and 48. All men thus 
engaged were instructed in their duties by the appropriate cooperating project. 
Records of the materials jointly certified are furnished to the field offices of both 
projects. 
Nursery and greenhouse establishments maintaining classified status under the 
quarantine regulations have increased in number during the year from 1,676 to 
2,424. While extension of the area accounts for a large proportion of the increase, 
surveys within the previously regulated territory to acquaint plant growers with 
their privileges under the regulations have also resulted in the addition of many 
classified premises. Since the recent extension of area, many shippers in cen- 
trally located sections of the regulated territory have relinquished their classified 
status, as their shipments of plant material are now wholly within the zones 
under regulation. 
With the growth of the regulated territory and the increase in the number of 
classified nurseries and greenhouses in infested sections, supervision of interdealer 
movement of certified stock between classified establishments has grown to con- 
siderable proportions. Since classified establishments are obliged, under the 
precautions necessary to assure eligibility of their entire stock, to receive only 
certified stock on their premises, large quantities of stock moving to such premises 
require inspection and certification, although portions of material so received may 
not eventually be reshipped to nonregulated States. 
Results of analyses by chemists of the Technological Division of soil samples 
collected in lead-arsenate-treated nursery plots and coldframes were made avail- 
able from April to June. Upon receipt of the data, the information was in turn 
transmitted to the nursery concerned. As a result of the analyses, 44.5 acres of 
nursery plots and frames, containing 210,887 plants, were re-treated prior to 
July 1 with lead arsenate in sufficient quantity to restore the treated frames or 
plots to the prescribed dosage of 1,500 pounds per acre. 
A supplement to the requirements for the disinfection of nursery products 
issued in August 1932 permits the tieatment of potting soil with lead arsenate. 
Previously soil for use in potting plants later to be shipped under certification 
required treatment in a closed container with raw carbon disulphide. Treatment 
of the soil with lead arsenate must be pei formed prior to August 1. The poisoned 
soil may then be used between October 1 and the following June 15. 
CERTIFICATION OF FRUITS, VEGETABLES, AND CUT FLOWERS 
Seasonal regulation of movement of quarantined farm products became 
effective on June 15. Rapid disappearance early in September of adult Japanese 
beetles made possible lifting of the farm-products-certification requirements on 
September 17. Active adult flight of the insect ceased several weeks prior to the 
lifting of the summer restrictions. What few beetles were still in evidence in 
mid-September were largely inactive, confining their feeding to the blooms of 
specially favored food plants, such as the dahlia. This latter condition made it 
necessary that the inspection and certification of all cut flowers moving to non- 
regulated territory be maintained until October 15. Inspectors operating in the 
wholesale-cut-flower establishments in Philadelphia were still removing beetles 
from inspected blooms as late as September 30. 
The presence of large numbers of adult beetles in the market and waterfront 
districts of Philadelphia persisted from July 12 to August 12. As has been the 
practice in past years, inspection service during this period was confined to the 
daily hours of beetle inactivity. 
Fruits and vegetables subject to quarantine restrictions during the summer of 
1932 were limited to nine farm products which are especially susceptible to beetle 
infestation in the fields where grown. Reduction in the number of classes of 
farm products under restriction and enlargement of the New York regulated 
area considerably curtailed the amount of quarantined farm products and cut 
flowers shipped under certification. Despite the reduced quantity of articles 
