1942] 
SERVICE AND REGULATORY ANN'OUN C E A 1 E N TS 
43 
authorized. This work has also shown the practicability of applying these treat- 
ments to soil masses up to 16 inches in diameter, instead of the maximum 11-inch 
diameter required heretofore. The instructions in B. E. P. Q. 503, fourth revision, 
which became effective January 9, 1942, are modified accordingly. 
The description as to the size requirements of the soil masses has been somewhat 
reworded for the purpose of clarification. 
§ 301.72-5 (c) 3 Administrative instructions — Treatments authorized. — Pursuant 
to the authority conferred upon the Chief of the Bureau of Entomology and Plant 
Quarantine by paragraph (a) of § 301.72-5, Chapter III, Title 7, Code of Federal 
Regulations [Regulation 5 of Notice of Quarantine No. 72 on account of the white- 
fringed beetle], subparagraph (2) of paragraph (a) of § 301.72-5 (c) [page 2 of the 
mimeographed edition of circular B. E. P. Q. 503, fourth revision] is hereby 
modified effective May 6, 1942, to read as follows: 
(2) Methyl bromide fumigation under partial vacuum. — (i) Fumigation under 
partial vacuum equivalent to at least 24.5 inches of mercury may be done with a 
dosage of either 4 pounds methyl bromide per 1,000 cubic feet, including the space 
occupied by the commodity, with an exposure of 1V 2 hours at a temperature of 
70° F. ; or a dosage of 3 pounds of methyl bromide per 1,000 cubic feet for a period 
of l*/2 hours at a temperature of 75° F. In either case the vacuum shall be main- 
tained during the entire period. 
(ii) The soil masses shall have a diameter of not more than 16 inches if spherical, 
or if not spherical the masses or pots shall be of such size that no point within 
them will be more than 8 inches from the nearest point on the surface. 
(iii) The soil shall not be wet but shall be in condition satisfactory to the 
inspector when treatment is applied. 
(iv) The fumigant-air mixture shall be circulated in the fumigation chamber 
by means of a fan the first 15 minutes of the exposure period to mix the vaporized 
fumigant thoroughly with the air in the chamber and bring it rn contact with the 
surface of the soil balls. The soil balls shall be washed with one or more changes 
of air at the end of the exposure period. 
(v) A standard vacuum fumigation chamber which can be closed tight and will 
withstand an external pressure of at least one atmosphere is required. A vacuum 
pump of sufficient capacity to reduce the pressure within the vacuum chamber to 
the equivalent of 3 inches of mercury (a 27-inch vacuum at sea level) in not more 
than 20 minutes is necessarv. 
(7 C. F. R. § 301.72-5; sec. 8, 39 Stat. 1165, 44 Stat. 250; 7 U. S. C. 161) 
Done at Washington, D. C, this 29th day of April 1942. 
P. N. Annand, 
Chief. 
B. E. P. Q. 485, Ninth Revision Effective May 11, 1942 through July 31, 1942 
TITLE 7— AGRICULTURE 
Chapter III — Bureau of Entomology and Plant Quarantine 
Part 301 — Domestic Quarantine Notices 
white-fringed beetle administrative instructions modified 
§ 301.72a Administrative instructions; removal of certification requirements for 
specified articles. — (a) Pursuant to the authority conferred upon the Chief of the 
Bureau of Entomology and Plant Quarantine by the second proviso of § 301.72, 
Chapter III, Title 7, Code of Federal Regulations [Notice of Quarantine No. 72. 
on account of the white-fringed beetle], all certification requirements for the inter- 
state movement from the regulated areas are hereby waived effective May 11, 
1942, through Julv 31, 1942, for the following articles and materials enumerated 
in § 301.72-3: 
(1) Soil, sand, and gravel, as indicated below: (i) Soil, when taken from a depth 
of at least 2 feet below the existing surface, and when entirely free from any 
surface soil to a depth of 2 feet. 
(ii) Sand and gravel when washed, processed, or otherwise treated to the satis- 
faction of the inspector. 
» Superseding §§ 301.72-5a and b. 
