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VOLUME 14

O N n to

NUMBER 23

Washington, Friday, February 4, 1949

TIRE 7 AGRICULTURE
Chapter III Bureau of Entomology and Plant Quarantine, Department of Agriculture B. E-. P. Q. 575
P art
301D omestic Q uarantine N otices
ADMINISTRATIVE INSTRUCTIONS PRESCRIBING
METHODS OF TREATMENT OF GRAPEFRUIT
AND ORANGES UNDER MEXICAN FRUITFLY
QUARANTINE

Pursuant to the authority conferred upon the Chief of the Bureau of Ento mology and Plant Quarantine by 301.64-4 e of the regulations supple mental to Quarantine No. 64 relating to the Mexican fruitfly 7 CFR 1945 Supp.
301.64-4 e , the following administra tive instructions are hereby issued to prescribe methods of treatment which will meet sterilization requirements im posed under said 301.64-4 e as a con dition of the issuance of permits under said regulations for the interstate move ment of grapefruit and oranges.
3G1.64-4a Administrative instruc tions: Methods of treatment of gravefruit and oranges for the Mexican fruitfly. a Any of the approved vaporheat or low-temperature methods of treatment specified in paragraph b of this section will meet sterilization re quirements imposed under 301.64-4 e as a condition of the issuance of permits for the interstate movement of grape fruit and oranges, if the treatment is conducted in a heat-treating room or refrigeration plant, as the case may be, which is located in the regulated area and is approved by the Bureau of Ento mology and Plant Quarantine, and if it is conducted under the supervision of an inspector of said Bureau who at all times has access to the fruit while it is under going treatment. The Bureau will ap prove only those rooms and plants which are adequately equipped to handle and treat the fruit as provided in this section.
While the results of experiments so far conducted have been successful, it should be emphasized that inexactness and carelessness in using the approved meth ods of treatment may result in injury to the fruit treated. In approving treat ments specified in paragraph b of this section the United States Department of Agriculture does not accept responsibil ity for fruit injury.

b Approved methods of treatment 1 Vapor-heat methods. In approved vapor-heat treatments the fruit is heated by saturated vapor at 110 P. which in condensing on the fruit gives up its latent heat. This latent heat is essential in as suring mortality of eggs and larvae of the Mexican fruitfly and in raising the temperature of the fruit evenly and quickly so as to prevent damage to the fruit. In practice in such treatments the saturated vapor is accompanied by a fine water mist and air admixture. The fruit is cooled immediately after treatment, and no wax or paraffin, either dry or in solution, is used until after the treatment has been completed. Vapor-heat treat ments are approved only if the vapor condition within the heat-treating room, the manner of stacking the field boxes containing the fruit in the room, and all other conditions affecting the efficacy of the treatment are satisfactory, in the opinion of the supervising in spector, to assure mortality of eggs and larvae of the Mexican fruitfly. The fol lowing methods of vapor-heat treat ment, when conducted in accordance with the principles stated above in this para graph and in paragraph a of this sec tion, are approved:
1 The temperature of the fruit shall be raised to 110 F., at the approximate center of the fruit, in a period of 8 hours and shall be held at that le?Vel during the following 6 hours. This method is adapted to sterilization plants that do not have the capacity to increase the temperature of the fruit steeply at the beginning of the treating period, ii The temperature of the fruit shall be raised to 110 F., at the approximate center of the fruit, in a period of 6 hours and shall be held at that level during the following 4 hours. The temperature of the fruit must be raised rapidly during the first 2 hours, after which it may be gradually raised to 110 F. in the follow ing 4 hours.
2 Low-temperature methods. The following methods of low-temperature treatment, when conducted in accord ance with the principles stated in para graph a of this section, are approved:
i The fruit shall be cooled until the temperature at the approximate center of the fruit reaches 33 F. and shall be held at or below that temperature for a period of 18 days.
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CONTENTS

Agriculture Department
See also Entomology and Plant Quarantine Bureau.
Proposed rule making:
Milk handling:
Cincinnati, Ohio, area______
Tri-State area_____________
Peas, fresh, cauliflower, and cabbage in Colorado_______

pas
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Alien Property, Office of
Notices:
Vesting orders, etc: N
Breisacher, William, et al__
Buchholz, John Frederick__
Egan, Max________________
Filing claims of certain debtors_________
Hofmann, Elizabeth, and Bishop Trust Co_________
Ilg, Frederick W___________
Oppenheimer, Paula_______
Pagenstecher, Rudolf, and Hiram C. Todd___________
Puiseux, Boulanger et Cie, Societe en Commandite par Actions______________
Strepp, Ludwig, and Adolf Kuttroff-________________
Tietz, Bertha, a n d Erna Kuhn__________________
Voelcker, August__________
Civil Aeronautics Board
Rules and regulations:
Air traffic rules; traffic patterns, LaGuardia, New York, Inter national Idlewild, and New ark Airports_______________
Commerce Department
See Industry Cooperation, Office of; International Trade, Office of.
Entomology and Plant Quaran tine Bureau
Rules and regulations:
Domestic quarantine; methods of treatment of grapefruit and oranges under Mexican fruitfly quarantine_________
Federal Security Agency
See Food and Drug Administra tion.
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