262 BUREAU OF ENTOMOLOGY AND PLANT QUAUAXTIXE [Oct.-Dec. 
Fumigatiou with methyl bromide at a dosage of 3 pounds per 1,000 cubic feet, 
including the space occupied by the strawberry plants, for a period of 4 hours, 
the plants and room to be at a temperature of not less than 00° F. during the 
fumigation i>eriod. The treatment is to be applied in a tight room with gas- 
tight doors, and the strawberry plants shall be piled loosely in open crates or 
baskets and stacked in the room so that the gas mixture can have access to all 
sides of the container. After the room is loaded and closetl the dosage of methyl 
bromide shall be volatilized within the room. The air-gas mixture shall be 
circulated by means of a fan or blower throughout the entire 4-hour fumigation 
period, anel the treatment is to be applied in a fumigation chamber of approved 
de.^ign and under the supervision of an inspector of the Bureau of Entomology 
and Plant Quarantine of the United States Depai'tnient of Agriculture. 
In authorizing the movement of strawberry plants fumigated according to 
the requirements stated above, it is to be understood that no liability shall attach 
either to the United States Department of Agriculture or to any of its employees 
in the event of injury resulting to the strawberry plants. 
Caution. — Methyl bromide is a gas at ordinary temi^ratures. It is colorless 
and practically odorless in concentrations used for fumigation of strawberry 
plants. It is a poison, and the operator should use an approved gas mask 
when exposed to the gas at concentrations used in fumigation. The strawberry 
plants in the fumigation chamber should be well aerated by blowing air through 
them and by ventilating the house before it is entered and the plants removed. 
Avery S. Hoyt, 
Acting Chief, Bureau of EntomoJogy and Plant Quarantine. 
ANNOUNCEMENTS RELATING TO MEXICAN FRUITFLY QUARANTINE 
(NO. 64) 
MEXICAN FRUITFLY QUARANTINE 
Revision of Quarantine and Regulations 
introductory note 
The following revision of Federal Domestic Plant Quarantine No. 64 and 
regulations supplemental thereto adds a portion of Jim Wells County in Texas 
to the regulated area : fixes a host-free period from May I to August 31. inclu- 
sive, of each year, subject to such modifications as to duration and dates of 
commencement and termination as may be authorized by the Chief of the Bureau 
ol Entomology and Plant Quarantine : designates the insect formerly known as 
Mexican fruitworm under the more appropriate title of Mexican fruitfly ; adds 
fruits of species of the genus Sargentia to the list of hosts; modifies former spe- 
cific restrictions as to containers ; and provides that the Chief of the Bureau of 
Entomology and Plant Quarantine may specify the conditions and period for the 
maintenance of sanitary requirements in groves, and may modify, by adminis- 
trative instructions, any of the restrictions contained in the regulations, other 
than those pertaining to extension or reduction of the regulated area, when in 
his judgment such action is necessary to prevent the spread of the Mexican 
fruitfly. 
summary 
These regulations as revised prohibit the interstate shipment of grapefruit, 
oranges, and all other citrus fruits except lemons and sour limes, from the 
counties of Brooks. Cameron. Hidalgo, Willacy, and a iwrtion of Jim Wells 
County, Tex., unless a Federal permit (Form 443) has been issued therefor. 
The permits may be limited as to destination, and when so limited, are not 
valid for ."Shipment to other dtv'^tination points or areas (except to diversion 
points ff)r diversion to authorized destinations only) (regulation 5 (a)). 
Peaches, apples, pears, plums, quinces, apricots, mangoes, sapotas, guavas, 
mameys, ciruelas, and fruit of species of the genus Sargentia are prohibited 
interstate .shipment from the regulated area (regulations 1 (e) and 5 (h)). 
There are no restrictions on the shipment of lemons or sour limes (regulation 5 
(c)). 
