pine blister rust, they must either be shipped in a preservative or be authorized 
and labeled under the provisions of regulation 7. 
(4) Five-leaved pines with roots, when visibly infected with the white- 
pine blister rust, shall not be moved or allowed to be moved interstate from 
any State or District unless such pines are shipped in a preservative or are 
authorized and labeled under the provisions of regulation 7. 
SECTION B. CONDITIONS GOVERNING THE ISSUANCE OF PERMITS 
(5) Federal pine-shipping permits may be issued upon compliance with the 
following conditions : 
(a) That the five-leaved pines to be moved shall be grown from seed in a 
location within 1 mile of which there have existed since the time of planting 
said seed no European black currant plants and within at least 1,500 feet of 
which there have existed since the time of planting said seed no currant or 
gooseberry plants of any size or variety which in the judgment of the inspector 
would involve risk of spread of the white-pine blister rust. A Ribes-free zone 
greater than 1,500 feet in width may be required when necessary in the judg- 
ment of the inspector to insure freedom from infection. The requirement that 
the Ribes-free conditions described must have been maintained since the time of 
planting the seed may be waived in the case of premises which represent in the 
judgment of the Bureau of Entomology and Plant Quarantine little or no risk 
of being involved in blister rust infection. 
(o) That the owner of the nursery shall submit a signed application for a 
pine-shipping permit to the Bureau of Entomology and Plant Quarantine, giving 
the location of the premises upon which said pines will be grown and agreeing 
that no five-leaved pines shall be grown in or distributed by any nursery or 
nurseries owned or controlled by the applicant except such as are maintained 
in compliance with the previous paragraph: Provided, That in the case of 
nursery properties under single ownership and management, but represented 
by units widely separate, such units may be considered as independent nurseries, 
and pine-shipping permits may be issued for one or more such individual units 
based on the certification requirements stated below when in the judgment 
of the inspector no risk of spread of white-pine blister rust is involved. The 
application required herein should preferably be filed before the seed are planted 
(in order to avoid disappointment and loss in case the premises are later found 
not to comply fully with the requirements of paragraph (a) above). 
(c) That before shipment of said pines certification shall be made to the 
Bureau of Entomology and Plant Quarantine by an inspector showing that 
the nursery stock has been found to be free from white-pine blister rust and 
that the premises and the environs have been inspected annually and main- 
tained as specified in paragraph (a) above. 
(d) Permits for the reshipment of such pines certified under the conditions 
prescribed by paragraph (c) above may be issued to purchasers of such stock 
who do not grow five-leaved pines upon receipt of an application and a signed 
agreement by the applicant agreeing to observe these regulations and the condi- 
tions under which the permit was issued. 
Regulation 3. Control of Movement of Currant and Gooseberry Plants 
(a) No European black currant plants {Rites nigrum) and no plants of the 
wild native western species known as R. bracteosum and R. petiolare shall 
be moved or allowed to be moved interstate in the continental United States 
except into or within the area comprised in the States of Alabama, Arkansas, 
Florida, Kansas, Louisiana, Mississippi, Missouri, Nebraska, North Dakota, 
Oklahoma, South Dakota, and Texas. 
(6) No currant or gooseberry plants of any species or variety shall be moved 
or allowed to be moved interstate from an infected State or District unless they 
have either been dipped (except the roots) immediately prior to shipment in 
lime-sulphur solution of a strength of 4.5° B. 1 or are shipped in a dormant 
and defoliated condition. Such lime-sulphur dip shall be plainly visible on said 
plants and be easily detectable by odor, the judgment of the inspector to be 
final as to adequacy of the dip and as to the condition of the plants as to 
dormancy and defoliation. 
1 Prepare this solution by diluting one part of commercial concentrated lime-sulphur 
solution of 32° B. with eight parts of water. 
