174 BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE [Oct.-Dnc. 
of Cameron, Hidalgo, Willacy, and Brooks in the Rio Grande Valley in Texas. 
The provisions of this regulation require the maintenance of a host-free period 
during which no host fruits are permit ted to develop in groves or to exist 
elsewhere in the regulated area except under certain specified conditions. This 
period begins during the month of March and extends for 7 months. 
Under the revision of this regulation, authority to make such modifications 
as may be considered necessary with respect to the duration and dates of com- 
mencement and termination of the host-free period within the regulated area 
is delegated to the Chief of the Bureau of Entomology and Plant Quarantine. 
The object is to facilitate the prompt issuance of any such modification as may 
be required in case fruit-fly infestation is found. 
MODIFICATION OF MEXICAN FRUIT WORM QUARANTINE REGULATIONS 
INTRODUCTORY NOTE 
The following revision of regulation 7 of the Mexican fruit worm quarantine 
authorizes the Chief of the Bureau of Entomology and Plant Quarantine to 
make such modifications as may be considered necessary with respect to the 
duration and dates of commencement and termination of the host-free period 
within the regulated area. 
Lee A. Strong, 
Chief, Bureau of Entomology and Plant Quarantine. 
AMENDMENT NO. 2 TO REVISED RULES AND REGULATIONS SUPPLEMENTAL TO 
NOTICE OF QUARANTINE NO. 64 
(Approved Nov. 14, 1936 ; effective Nov. 16, 1936) 
Under authority conferred by the Plant Quarantine Act of August 20, 1912 
(37 Stat. 315), as amended, it is ordered that regulation 7 of the revised rules 
and regulations supplemental to Notice of Quarantine No. 64, on account of 
the Mexican fruit worm, which were promulgated on August 12, 1932, be and 
the same is hereby amended to read as follows : 
Regulation 7. Conditions Required in the Regulated Areas 
The interstate movement of grapefruit, oranges, and other restricted citrus 
fruit from the regulated areas under permit issued by the United States 
Department of Agriculture will be conditioned on the State of Texas providing 
for and enforcing the following control measures in manner and by method 
approved by the United States Department of Agriculture, namely: 
SECTION A. HOST-FREE PERIOD 
A host-free period shall be maintained each year beginning in the month 
of March and continuing for 7 months, subject to such modification as to 
duration and dates of commencement and termination as may be authorized 
by the Chief of the Bureau of Entomology and Plant Quarantine on presentation 
of evidence that such modification is necessary or desirable and does not 
involve increase of risk of propagating the Mexican fruit worm. 
Prior to the commencement of such host-free period each year, all citrus 
fruit except lemons and sour limes shall be removed from the trees for ship- 
ment, storage, or sale, and all other host fruits shall be destroyed either fol- 
lowing removal from the trees or by destruction of the trees themselves. 
No host fruits shall be permitted to develop in groves or to exist elsewhere 
within a regulated area at any time during such host-free period except as 
follows: (1) Citrus fruits developing on the trees in such stages of immaturity 
that, in the judgment of an inspector, they are not susceptible to infestation by 
the Mexican fruit worm; and (2) citrus fruits in storage, or on retail sale 
for immediate consumption, stored, or maintained under such conditions and 
for such periods of time as shall be approved by an inspector. 
