112 
the enforcement of the provisions of Quarantine No. 58. However, 
valuable assistance in this work is rendered by insuhir inspectors 
serving as collaborators. 
In Hawaii the enforcement of foreign plant quarantines is handled 
wholly by insular inspectors serving as collaborators. The inspectors 
of this Bureau stationed in the Hawaiian Islands arc engaged in the 
enforcement of Quarantine No. IB, which governs the movement of 
fresh fruits and vegetables to the mainland. Effective November 
1. 1938, administrative instructions were issued authorizing the ship- 
ment of fruits and vegetables from Hawaii to the mainland subject 
to sterilization under supervision. Extensive experiments had 
demonstrated that the holding of fruits and vegetables at certain 
prescribed temperatures for certain periods would kill all stag* 
the Mediterranean fruitfly and the melonfly. This made it possible 
to ship host fruits and vegetables of these two insects, which prior 
to this date had been refused movement to the mainland. Super- 
vising the approved treatments as outlined in B. E. P. Q. 481 has 
increased considerably the work of the plant-quarantine inspectors 
stationed in Hawaii. 
During the year 2,721 shipments, consisting of 108.50-2 bunches of 
bananas, 105.010 crates of pineapples, 42.020 coconuts, and 2,269,485 
pounds of other approved fruits and vegetables, were inspected and 
certified for movement to the mainland. Of these. 69,363 pounds 
were papayas and 28,117 were avocados which had been given the 
approved sterilization treatments in Hawaii under close supervision. 
Inspections were made in the fields, in packing houses, and on the 
docks. The inspection of parcel-post packages destined for points on 
the mainland requires considerable time and effort. During the year 
323,055 such packages were handled; 05,^68 of these were opened and 
inspected, and 106 were found to contain prohibited plant material. 
Since the inauguration of trans-Pacific air service it has been the 
practice not only to inspect the planes when they arrive from the 
Orient but also to inspect all planes, baggage, and express before the 
planes leave Honolulu for California. This procedure serves as an 
added precaution against the carrying of plant pests from Hawaii to 
the mainland and permits the prompt release of baggage and express 
upon arrival at the mainland. Under this arrangement 41 airplanes, 
1,406 pieces of baggage, and 2.555 air-express packages were in- 
spected. The airplanes arriving in Hawaii from foreign countries 
are Included under the heading Airplane Inspection. 
Other activities in Hawaii consisted in the inspection and sealing 
of 3,162 pieces of baggage and the inspection of 530 pieces of express 
leaving Hawaii by boat. 
INSPECTION OF SPECIAL-PERMIT AND DEPARTMENTAL PLANT MATERIAL 
Importations of propagating plant material are inspected at spe- 
cial ports of entry designated for that purpose. Most of Such impor- 
tation- are inspected and treated at the inspection house in Washing- 
ton, 1). (\. and it was the practice in past report- to include a table 
summarizing the inspection of plants and plant products in the Dis- 
trict of Columbia. This table has now been discontinued, and Wash- 
ington has been given the same status as other ports of entry in 
tables 11. 15, L9, and 20. 
